FlightAware Discussions

Incorrect response when last flight in response is diverted

When querying using FlightInfoEx endpoint with howMany set to 15, if the last flight in the response corresponds to a diverted flight, the first flight on the nextOffset is the same as last flight. It is returning one flight record instead of the two flights that I get back when I query with a bigger howMany param.

FA Flight ID showing this behavior in the below request: UAL1289-1633306572-fa-0014

First request:
https://flightxml.flightaware.com/json/FlightXML2/FlightInfoEx?ident=N33266&howMany=15&offset=0

{"FlightInfoExResult":{"next_offset":15,"flights":[{"faFlightID":"UAL1485-1633684788-fa-0009","ident":"UAL1485","aircrafttype":"B738","filed_ete":"02:30:00","filed_time":1633684788,"filed_departuretime":1633917000,"filed_airspeed_kts":346,"filed_airspeed_mach":"","filed_altitude":0,"route":"","actualdeparturetime":0,"estimatedarrivaltime":1633926000,"actualarrivaltime":0,"diverted":"","origin":"KDEN","destination":"KEUG","originName":"Denver Intl","originCity":"Denver, CO","destinationName":"Mahlon Sweet Fld","destinationCity":"Eugene, OR"},{"faFlightID":"UAL1951-1633670117-fa-0001","ident":"UAL1951","aircrafttype":"B738","filed_ete":"01:32:00","filed_time":1633670117,"filed_departuretime":1633906500,"filed_airspeed_kts":302,"filed_airspeed_mach":"","filed_altitude":0,"route":"","actualdeparturetime":0,"estimatedarrivaltime":1633912020,"actualarrivaltime":0,"diverted":"","origin":"KMCI","destination":"KDEN","originName":"Kansas City Intl","originCity":"Kansas City, MO","destinationName":"Denver Intl","destinationCity":"Denver, CO"},{"faFlightID":"UAL586-1633670112-fa-0003","ident":"UAL586","aircrafttype":"B738","filed_ete":"01:16:00","filed_time":1633670112,"filed_departuretime":1633896300,"filed_airspeed_kts":365,"filed_airspeed_mach":"","filed_altitude":0,"route":"","actualdeparturetime":0,"estimatedarrivaltime":1633900860,"actualarrivaltime":0,"diverted":"","origin":"KDEN","destination":"KMCI","originName":"Denver Intl","originCity":"Denver, CO","destinationName":"Kansas City Intl","destinationCity":"Kansas City, MO"},{"faFlightID":"UAL1448-1633627615-fa-0006","ident":"UAL1448","aircrafttype":"B738","filed_ete":"02:30:00","filed_time":1633627615,"filed_departuretime":1633880400,"filed_airspeed_kts":356,"filed_airspeed_mach":"","filed_altitude":0,"route":"","actualdeparturetime":0,"estimatedarrivaltime":1633889400,"actualarrivaltime":0,"diverted":"","origin":"KSEA","destination":"KDEN","originName":"Seattle-Tacoma Intl","originCity":"Seattle, WA","destinationName":"Denver Intl","destinationCity":"Denver, CO"},{"faFlightID":"UAL1788-1633571933-fa-0006","ident":"UAL1788","aircrafttype":"B738","filed_ete":"04:31:00","filed_time":1633571933,"filed_departuretime":1633816200,"filed_airspeed_kts":361,"filed_airspeed_mach":"","filed_altitude":0,"route":"","actualdeparturetime":0,"estimatedarrivaltime":1633832460,"actualarrivaltime":0,"diverted":"","origin":"KIAH","destination":"KSEA","originName":"Houston Bush Int'ctl","originCity":"Houston, TX","destinationName":"Seattle-Tacoma Intl","destinationCity":"Seattle, WA"},{"faFlightID":"UAL774-1633549794-fa-0004","ident":"UAL774","aircrafttype":"B738","filed_ete":"02:17:00","filed_time":1633549794,"filed_departuretime":1633803180,"filed_airspeed_kts":457,"filed_airspeed_mach":"","filed_altitude":360,"route":"LEWRD1 REMIS Y280 LEV NNCEE1","actualdeparturetime":0,"estimatedarrivaltime":1633811580,"actualarrivaltime":0,"diverted":"","origin":"KMCO","destination":"KIAH","originName":"Orlando Intl","originCity":"Orlando, FL","destinationName":"Houston Bush Int'ctl","destinationCity":"Houston, TX"},{"faFlightID":"UAL413-1633549794-fa-0006","ident":"UAL413","aircrafttype":"B738","filed_ete":"02:09:00","filed_time":1633549794,"filed_departuretime":1633791180,"filed_airspeed_kts":448,"filed_airspeed_mach":"","filed_altitude":370,"route":"GUMBY3 LLA LEV Y280 CHRGE PRICY1","actualdeparturetime":0,"estimatedarrivaltime":1633798920,"actualarrivaltime":0,"diverted":"","origin":"KIAH","destination":"KMCO","originName":"Houston Bush Int'ctl","originCity":"Houston, TX","destinationName":"Orlando Intl","destinationCity":"Orlando, FL"},{"faFlightID":"UAL2266-1633510128-fa-0007","ident":"UAL2266","aircrafttype":"B738","filed_ete":"01:21:00","filed_time":1633510128,"filed_departuretime":1633731000,"filed_airspeed_kts":445,"filed_airspeed_mach":"","filed_altitude":360,"route":"OKM CVE GUSHR3","actualdeparturetime":0,"estimatedarrivaltime":1633735860,"actualarrivaltime":0,"diverted":"","origin":"KTUL","destination":"KIAH","originName":"Tulsa Intl","originCity":"Tulsa, OK","destinationName":"Houston Bush Int'ctl","destinationCity":"Houston, TX"},{"faFlightID":"UAL1545-1633462886-fa-0011","ident":"UAL1545","aircrafttype":"B738","filed_ete":"01:06:00","filed_time":1633462886,"filed_departuretime":1633722000,"filed_airspeed_kts":486,"filed_airspeed_mach":"","filed_altitude":260,"route":"STYCK8 WTSON BYP TUL","actualdeparturetime":0,"estimatedarrivaltime":1633725960,"actualarrivaltime":0,"diverted":"","origin":"KIAH","destination":"KTUL","originName":"Houston Bush Int'ctl","originCity":"Houston, TX","destinationName":"Tulsa Intl","destinationCity":"Tulsa, OK"},{"faFlightID":"UAL2636-1633450050-fa-0006","ident":"UAL2636","aircrafttype":"B738","filed_ete":"02:04:00","filed_time":1633707910,"filed_departuretime":1633708680,"filed_airspeed_kts":453,"filed_airspeed_mach":"","filed_altitude":360,"route":"LEWRD1 REMIS Y280 LEV LINKK1","actualdeparturetime":1633708692,"estimatedarrivaltime":1633716037,"actualarrivaltime":1633716037,"diverted":"","origin":"KMCO","destination":"KIAH","originName":"Orlando Intl","originCity":"Orlando, FL","destinationName":"Houston Bush Int'ctl","destinationCity":"Houston, TX"},{"faFlightID":"UAL398-1633450052-fa-0002","ident":"UAL398","aircrafttype":"B738","filed_ete":"02:15:00","filed_time":1633695060,"filed_departuretime":1633696200,"filed_airspeed_kts":462,"filed_airspeed_mach":"","filed_altitude":360,"route":"CAVVS4 APE SPAYD VXV ATL PZD ILEXX JAFAR1","actualdeparturetime":1633695754,"estimatedarrivaltime":1633704660,"actualarrivaltime":1633704660,"diverted":"","origin":"KCLE","destination":"KMCO","originName":"Cleveland-Hopkins Intl","originCity":"Cleveland, OH","destinationName":"Orlando Intl","destinationCity":"Orlando, FL"},{"faFlightID":"UAL1816-1633395489-fa-0001","ident":"UAL1816","aircrafttype":"B738","filed_ete":"02:30:00","filed_time":1633643376,"filed_departuretime":1633644300,"filed_airspeed_kts":463,"filed_airspeed_mach":"","filed_altitude":350,"route":"EPKEE7 DUUZE ICT SGF J98 FAM J78 PXV DRUGA ROKNN3","actualdeparturetime":1633644342,"estimatedarrivaltime":1633653240,"actualarrivaltime":1633653240,"diverted":"","origin":"KDEN","destination":"KCLE","originName":"Denver Intl","originCity":"Denver, CO","destinationName":"Cleveland-Hopkins Intl","destinationCity":"Cleveland, OH"},{"faFlightID":"UAL1630-1633425652-fa-0009","ident":"UAL1630","aircrafttype":"B738","filed_ete":"02:09:00","filed_time":1633628977,"filed_departuretime":1633630200,"filed_airspeed_kts":447,"filed_airspeed_mach":"","filed_altitude":350,"route":"MONTN1 SEA NORMY MODDA STEVS FINUT Q148 WEDAK DLN TOFUU FLATI3","actualdeparturetime":1633630381,"estimatedarrivaltime":1633638059,"actualarrivaltime":1633638059,"diverted":"","origin":"KSEA","destination":"KDEN","originName":"Seattle-Tacoma Intl","originCity":"Seattle, WA","destinationName":"Denver Intl","destinationCity":"Denver, CO"},{"faFlightID":"UAL1077-1633425580-fa-0007","ident":"UAL1077","aircrafttype":"B738","filed_ete":"02:18:00","filed_time":1633614545,"filed_departuretime":1633615800,"filed_airspeed_kts":452,"filed_airspeed_mach":"","filed_altitude":380,"route":"DDRTH1 DDRTH DBS PDT CHINS4","actualdeparturetime":1633615433,"estimatedarrivaltime":1633624080,"actualarrivaltime":1633624080,"diverted":"","origin":"KDEN","destination":"KSEA","originName":"Denver Intl","originCity":"Denver, CO","destinationName":"Seattle-Tacoma Intl","destinationCity":"Seattle, WA"},{"faFlightID":"UAL1289-1633306572-fa-0014","ident":"UAL1289","aircrafttype":"B738","filed_ete":"03:52:00","filed_time":1633531143,"filed_departuretime":1633531740,"filed_airspeed_kts":456,"filed_airspeed_mach":"","filed_altitude":360,"route":"STYCK7 DOLEY FUZ SPS BGD PUB OCS PDT CHINS4","actualdeparturetime":-1,"estimatedarrivaltime":-1,"actualarrivaltime":-1,"diverted":"t","origin":"KIAH","destination":"KSEA","originName":"Houston Bush Int'ctl","originCity":"Houston, TX","destinationName":"Seattle-Tacoma Intl","destinationCity":"Seattle, WA"}]}}

Second request using the value of next_offset above as the offset in the request:

https://flightxml.flightaware.com/json/FlightXML2/FlightInfoEx?ident=N33266&howMany=15&offset=15

{"FlightInfoExResult":{"next_offset":30,"flights":[{"faFlightID":"UAL1289-1633306572-fa-0014","ident":"UAL1289","aircrafttype":"B738","filed_ete":"03:52:00","filed_time":1633531143,"filed_departuretime":1633531740,"filed_airspeed_kts":456,"filed_airspeed_mach":"","filed_altitude":360,"route":"STYCK7 DOLEY FUZ SPS BGD PUB OCS PDT CHINS4","actualdeparturetime":-1,"estimatedarrivaltime":-1,"actualarrivaltime":-1,"diverted":"t","origin":"KIAH","destination":"KSEA","originName":"Houston Bush Int'ctl","originCity":"Houston, TX","destinationName":"Seattle-Tacoma Intl","destinationCity":"Seattle, WA"},{"faFlightID":"UAL1135-1633257995-fa-0002","ident":"UAL1135","aircrafttype":"B738","filed_ete":"00:32:00","filed_time":1633515469,"filed_departuretime":1633517040,"filed_airspeed_kts":342,"filed_airspeed_mach":"","filed_altitude":230,"route":"ILEXY3 ILEXY DRLLR5","actualdeparturetime":1633516389,"estimatedarrivaltime":1633517880,"actualarrivaltime":1633517880,"diverted":"","origin":"KAUS","destination":"KIAH","originName":"Austin-Bergstrom Intl","originCity":"Austin, TX","destinationName":"Houston Bush Int'ctl","destinationCity":"Houston, TX"},{"faFlightID":"UAL1858-1633219057-fa-0009","ident":"UAL1858","aircrafttype":"B738","filed_ete":"03:11:00","filed_time":1633475120,"filed_departuretime":1633472400,"filed_airspeed_kts":458,"filed_airspeed_mach":"","filed_altitude":380,"route":"CLTCH3 MAULS PSK VXV VUZ MEI IAH LUKKN WLEEE6","actualdeparturetime":1633476080,"estimatedarrivaltime":1633486440,"actualarrivaltime":1633486440,"diverted":"","origin":"KIAD","destination":"KAUS","originName":"Washington Dulles Intl","originCity":"Washington, DC","destinationName":"Austin-Bergstrom Intl","destinationCity":"Austin, TX"},{"faFlightID":"UAL369-1633206628-fa-0002","ident":"UAL369","aircrafttype":"B738","filed_ete":"01:14:00","filed_time":1633467570,"filed_departuretime":1633460700,"filed_airspeed_kts":477,"filed_airspeed_mach":"","filed_altitude":300,"route":"BLZZR4 BLZZR BAF HYPER8","actualdeparturetime":1633468472,"estimatedarrivaltime":1633472640,"actualarrivaltime":1633472640,"diverted":"","origin":"KBOS","destination":"KIAD","originName":"Boston Logan Intl","originCity":"Boston, MA","destinationName":"Washington Dulles Intl","destinationCity":"Washington, DC"},{"faFlightID":"UAL1104-1633222021-fa-0013","ident":"UAL1104","aircrafttype":"B738","filed_ete":"01:44:00","filed_time":1633222021,"filed_departuretime":1633460520,"filed_airspeed_kts":456,"filed_airspeed_mach":"","filed_altitude":360,"route":"LOWGN8 ROLLS J52 LBL HALEN NIIXX2","actualdeparturetime":-1,"estimatedarrivaltime":-1,"actualarrivaltime":-1,"diverted":"","origin":"KDFW","destination":"KDEN","originName":"Dallas-Fort Worth Intl","originCity":"Dallas-Fort Worth, TX","destinationName":"Denver Intl","destinationCity":"Denver, CO"},{"faFlightID":"UAL782-1633222020-fa-0010","ident":"UAL782","aircrafttype":"B738","filed_ete":"01:18:00","filed_time":1633450005,"filed_departuretime":1633449900,"filed_airspeed_kts":439,"filed_airspeed_mach":"","filed_altitude":370,"route":"","actualdeparturetime":-1,"estimatedarrivaltime":-1,"actualarrivaltime":-1,"diverted":"","origin":"KDEN","destination":"KMCI","originName":"Denver Intl","originCity":"Denver, CO","destinationName":"Kansas City Intl","destinationCity":"Kansas City, MO"},{"faFlightID":"UAL361-1633206628-fa-0013","ident":"UAL361","aircrafttype":"B738","filed_ete":"03:34:00","filed_time":1633450487,"filed_departuretime":1633443300,"filed_airspeed_kts":463,"filed_airspeed_mach":"","filed_altitude":350,"route":"CHUWY1 CHUWY ONL MCW BAE HOCKE Q935 PONCT JFUND2","actualdeparturetime":1633451003,"estimatedarrivaltime":1633464720,"actualarrivaltime":1633464720,"diverted":"","origin":"KDEN","destination":"KBOS","originName":"Denver Intl","originCity":"Denver, CO","destinationName":"Boston Logan Intl","destinationCity":"Boston, MA"},{"faFlightID":"UAL486-1633166260-fa-0003","ident":"UAL486","aircrafttype":"B738","filed_ete":"02:31:00","filed_time":1633382406,"filed_departuretime":1633383300,"filed_airspeed_kts":443,"filed_airspeed_mach":"","filed_altitude":360,"route":"GTLKE4 YABRO IOW J10 OBH BRWRY LAWGR2","actualdeparturetime":1633383051,"estimatedarrivaltime":1633391940,"actualarrivaltime":1633391940,"diverted":"","origin":"KCLE","destination":"KDEN","originName":"Cleveland-Hopkins Intl","originCity":"Cleveland, OH","destinationName":"Denver Intl","destinationCity":"Denver, CO"},{"faFlightID":"UAL405-1633112498-fa-0011","ident":"UAL405","aircrafttype":"B738","filed_ete":"02:40:00","filed_time":1633364140,"filed_departuretime":1633363500,"filed_airspeed_kts":474,"filed_airspeed_mach":"","filed_altitude":330,"route":"EEONS8 WYNDM HCT J60 DRABS J60 JOT ZIINE BENJO BRWNZ4","actualdeparturetime":1633364985,"estimatedarrivaltime":1633374300,"actualarrivaltime":1633374300,"diverted":"","origin":"KDEN","destination":"KCLE","originName":"Denver Intl","originCity":"Denver, CO","destinationName":"Cleveland-Hopkins Intl","destinationCity":"Cleveland, OH"},{"faFlightID":"UAL2381-1633131014-fa-0012","ident":"UAL2381","aircrafttype":"B738","filed_ete":"01:53:00","filed_time":1633351483,"filed_departuretime":1633352100,"filed_airspeed_kts":460,"filed_airspeed_mach":"","filed_altitude":390,"route":"SKOTT2 SKOTT TOFUU FLATI2","actualdeparturetime":1633352292,"estimatedarrivaltime":1633358460,"actualarrivaltime":1633358460,"diverted":"","origin":"KGPI","destination":"KDEN","originName":"Glacier Park Intl","originCity":"Kalispell, MT","destinationName":"Denver Intl","destinationCity":"Denver, CO"},{"faFlightID":"UAL696-1633079903-fa-0007","ident":"UAL696","aircrafttype":"B738","filed_ete":"01:45:00","filed_time":1633311441,"filed_departuretime":1633312320,"filed_airspeed_kts":437,"filed_airspeed_mach":"","filed_altitude":380,"route":"DDRTH1 DDRTH BOY HLN FCA","actualdeparturetime":1633312131,"estimatedarrivaltime":1633318680,"actualarrivaltime":1633318680,"diverted":"","origin":"KDEN","destination":"KGPI","originName":"Denver Intl","originCity":"Denver, CO","destinationName":"Glacier Park Intl","destinationCity":"Kalispell, MT"},{"faFlightID":"UAL486-1633079825-fa-0001","ident":"UAL486","aircrafttype":"B738","filed_ete":"02:38:00","filed_time":1633297265,"filed_departuretime":1633296900,"filed_airspeed_kts":423,"filed_airspeed_mach":"","filed_altitude":280,"route":"GTLKE4 ALPHE PMM BAE MCW ONL PORDR AALLE2","actualdeparturetime":1633296640,"estimatedarrivaltime":1633306020,"actualarrivaltime":1633306020,"diverted":"","origin":"KCLE","destination":"KDEN","originName":"Cleveland-Hopkins Intl","originCity":"Cleveland, OH","destinationName":"Denver Intl","destinationCity":"Denver, CO"},{"faFlightID":"UAL1739-1633079891-fa-0007","ident":"UAL1739","aircrafttype":"B738","filed_ete":"01:57:00","filed_time":1633275674,"filed_departuretime":1633276500,"filed_airspeed_kts":453,"filed_airspeed_mach":"","filed_altitude":370,"route":"FATHE1 VIYAP Q69 GURGE Q93 QUIWE SPA J85 HVQ JANYS ROLLN2","actualdeparturetime":1633276480,"estimatedarrivaltime":1633283460,"actualarrivaltime":1633283460,"diverted":"","origin":"KMCO","destination":"KCLE","originName":"Orlando Intl","originCity":"Orlando, FL","destinationName":"Cleveland-Hopkins Intl","destinationCity":"Cleveland, OH"},{"faFlightID":"UAL785-1633006916-fa-0002","ident":"UAL785","aircrafttype":"B738","filed_ete":"01:48:00","filed_time":1633263753,"filed_departuretime":1633264800,"filed_airspeed_kts":443,"filed_airspeed_mach":"","filed_altitude":370,"route":"MMUGS4 LLA LEV Y280 CHRGE PRICY1","actualdeparturetime":1633264800,"estimatedarrivaltime":1633271340,"actualarrivaltime":1633271340,"diverted":"","origin":"KIAH","destination":"KMCO","originName":"Houston Bush Int'ctl","originCity":"Houston, TX","destinationName":"Orlando Intl","destinationCity":"Orlando, FL"},{"faFlightID":"UAL1201-1632993360-fa-0006","ident":"UAL1201","aircrafttype":"B738","filed_ete":"03:22:00","filed_time":1633209724,"filed_departuretime":1633210500,"filed_airspeed_kts":448,"filed_airspeed_mach":"","filed_altitude":380,"route":"SCRAM6 GLANC COLZI Q52 CHOPZ MGM J37 HRV KCEEE HOODO LAMMY LMEDA HTOWN2","actualdeparturetime":1633210785,"estimatedarrivaltime":1633221900,"actualarrivaltime":1633221900,"diverted":"","origin":"KIAD","destination":"KIAH","originName":"Washington Dulles Intl","originCity":"Washington, DC","destinationName":"Houston Bush Int'ctl","destinationCity":"Houston, TX"}]}}

However if I tweak the howMany to return a larger set of if I use offset = next_offset -1, I get both the flights back.

https://flightxml.flightaware.com/json/FlightXML2/FlightInfoEx?ident=N33266&howMany=15&offset=14

{"FlightInfoExResult":{"next_offset":29,"flights":[{"faFlightID":"UAL1289-1633306572-fa-0014","ident":"UAL1289","aircrafttype":"B738","filed_ete":"03:52:00","filed_time":1633531143,"filed_departuretime":1633531740,"filed_airspeed_kts":456,"filed_airspeed_mach":"","filed_altitude":360,"route":"STYCK7 DOLEY FUZ SPS BGD PUB OCS PDT CHINS4","actualdeparturetime":1633532308,"estimatedarrivaltime":1633539120,"actualarrivaltime":1633539120,"diverted":"","origin":"KIAH","destination":"KDEN","originName":"Houston Bush Int'ctl","originCity":"Houston, TX","destinationName":"Denver Intl","destinationCity":"Denver, CO"},{"faFlightID":"UAL1289-1633306572-fa-0014","ident":"UAL1289","aircrafttype":"B738","filed_ete":"03:52:00","filed_time":1633531143,"filed_departuretime":1633531740,"filed_airspeed_kts":456,"filed_airspeed_mach":"","filed_altitude":360,"route":"STYCK7 DOLEY FUZ SPS BGD PUB OCS PDT CHINS4","actualdeparturetime":-1,"estimatedarrivaltime":-1,"actualarrivaltime":-1,"diverted":"t","origin":"KIAH","destination":"KSEA","originName":"Houston Bush Int'ctl","originCity":"Houston, TX","destinationName":"Seattle-Tacoma Intl","destinationCity":"Seattle, WA"},{"faFlightID":"UAL1135-1633257995-fa-0002","ident":"UAL1135","aircrafttype":"B738","filed_ete":"00:32:00","filed_time":1633515469,"filed_departuretime":1633517040,"filed_airspeed_kts":342,"filed_airspeed_mach":"","filed_altitude":230,"route":"ILEXY3 ILEXY DRLLR5","actualdeparturetime":1633516389,"estimatedarrivaltime":1633517880,"actualarrivaltime":1633517880,"diverted":"","origin":"KAUS","destination":"KIAH","originName":"Austin-Bergstrom Intl","originCity":"Austin, TX","destinationName":"Houston Bush Int'ctl","destinationCity":"Houston, TX"},{"faFlightID":"UAL1858-1633219057-fa-0009","ident":"UAL1858","aircrafttype":"B738","filed_ete":"03:11:00","filed_time":1633475120,"filed_departuretime":1633472400,"filed_airspeed_kts":458,"filed_airspeed_mach":"","filed_altitude":380,"route":"CLTCH3 MAULS PSK VXV VUZ MEI IAH LUKKN WLEEE6","actualdeparturetime":1633476080,"estimatedarrivaltime":1633486440,"actualarrivaltime":1633486440,"diverted":"","origin":"KIAD","destination":"KAUS","originName":"Washington Dulles Intl","originCity":"Washington, DC","destinationName":"Austin-Bergstrom Intl","destinationCity":"Austin, TX"},{"faFlightID":"UAL369-1633206628-fa-0002","ident":"UAL369","aircrafttype":"B738","filed_ete":"01:14:00","filed_time":1633467570,"filed_departuretime":1633460700,"filed_airspeed_kts":477,"filed_airspeed_mach":"","filed_altitude":300,"route":"BLZZR4 BLZZR BAF HYPER8","actualdeparturetime":1633468472,"estimatedarrivaltime":1633472640,"actualarrivaltime":1633472640,"diverted":"","origin":"KBOS","destination":"KIAD","originName":"Boston Logan Intl","originCity":"Boston, MA","destinationName":"Washington Dulles Intl","destinationCity":"Washington, DC"},{"faFlightID":"UAL1104-1633222021-fa-0013","ident":"UAL1104","aircrafttype":"B738","filed_ete":"01:44:00","filed_time":1633222021,"filed_departuretime":1633460520,"filed_airspeed_kts":456,"filed_airspeed_mach":"","filed_altitude":360,"route":"LOWGN8 ROLLS J52 LBL HALEN NIIXX2","actualdeparturetime":-1,"estimatedarrivaltime":-1,"actualarrivaltime":-1,"diverted":"","origin":"KDFW","destination":"KDEN","originName":"Dallas-Fort Worth Intl","originCity":"Dallas-Fort Worth, TX","destinationName":"Denver Intl","destinationCity":"Denver, CO"},{"faFlightID":"UAL782-1633222020-fa-0010","ident":"UAL782","aircrafttype":"B738","filed_ete":"01:18:00","filed_time":1633450005,"filed_departuretime":1633449900,"filed_airspeed_kts":439,"filed_airspeed_mach":"","filed_altitude":370,"route":"","actualdeparturetime":-1,"estimatedarrivaltime":-1,"actualarrivaltime":-1,"diverted":"","origin":"KDEN","destination":"KMCI","originName":"Denver Intl","originCity":"Denver, CO","destinationName":"Kansas City Intl","destinationCity":"Kansas City, MO"},{"faFlightID":"UAL361-1633206628-fa-0013","ident":"UAL361","aircrafttype":"B738","filed_ete":"03:34:00","filed_time":1633450487,"filed_departuretime":1633443300,"filed_airspeed_kts":463,"filed_airspeed_mach":"","filed_altitude":350,"route":"CHUWY1 CHUWY ONL MCW BAE HOCKE Q935 PONCT JFUND2","actualdeparturetime":1633451003,"estimatedarrivaltime":1633464720,"actualarrivaltime":1633464720,"diverted":"","origin":"KDEN","destination":"KBOS","originName":"Denver Intl","originCity":"Denver, CO","destinationName":"Boston Logan Intl","destinationCity":"Boston, MA"},{"faFlightID":"UAL486-1633166260-fa-0003","ident":"UAL486","aircrafttype":"B738","filed_ete":"02:31:00","filed_time":1633382406,"filed_departuretime":1633383300,"filed_airspeed_kts":443,"filed_airspeed_mach":"","filed_altitude":360,"route":"GTLKE4 YABRO IOW J10 OBH BRWRY LAWGR2","actualdeparturetime":1633383051,"estimatedarrivaltime":1633391940,"actualarrivaltime":1633391940,"diverted":"","origin":"KCLE","destination":"KDEN","originName":"Cleveland-Hopkins Intl","originCity":"Cleveland, OH","destinationName":"Denver Intl","destinationCity":"Denver, CO"},{"faFlightID":"UAL405-1633112498-fa-0011","ident":"UAL405","aircrafttype":"B738","filed_ete":"02:40:00","filed_time":1633364140,"filed_departuretime":1633363500,"filed_airspeed_kts":474,"filed_airspeed_mach":"","filed_altitude":330,"route":"EEONS8 WYNDM HCT J60 DRABS J60 JOT ZIINE BENJO BRWNZ4","actualdeparturetime":1633364985,"estimatedarrivaltime":1633374300,"actualarrivaltime":1633374300,"diverted":"","origin":"KDEN","destination":"KCLE","originName":"Denver Intl","originCity":"Denver, CO","destinationName":"Cleveland-Hopkins Intl","destinationCity":"Cleveland, OH"},{"faFlightID":"UAL2381-1633131014-fa-0012","ident":"UAL2381","aircrafttype":"B738","filed_ete":"01:53:00","filed_time":1633351483,"filed_departuretime":1633352100,"filed_airspeed_kts":460,"filed_airspeed_mach":"","filed_altitude":390,"route":"SKOTT2 SKOTT TOFUU FLATI2","actualdeparturetime":1633352292,"estimatedarrivaltime":1633358460,"actualarrivaltime":1633358460,"diverted":"","origin":"KGPI","destination":"KDEN","originName":"Glacier Park Intl","originCity":"Kalispell, MT","destinationName":"Denver Intl","destinationCity":"Denver, CO"},{"faFlightID":"UAL696-1633079903-fa-0007","ident":"UAL696","aircrafttype":"B738","filed_ete":"01:45:00","filed_time":1633311441,"filed_departuretime":1633312320,"filed_airspeed_kts":437,"filed_airspeed_mach":"","filed_altitude":380,"route":"DDRTH1 DDRTH BOY HLN FCA","actualdeparturetime":1633312131,"estimatedarrivaltime":1633318680,"actualarrivaltime":1633318680,"diverted":"","origin":"KDEN","destination":"KGPI","originName":"Denver Intl","originCity":"Denver, CO","destinationName":"Glacier Park Intl","destinationCity":"Kalispell, MT"},{"faFlightID":"UAL486-1633079825-fa-0001","ident":"UAL486","aircrafttype":"B738","filed_ete":"02:38:00","filed_time":1633297265,"filed_departuretime":1633296900,"filed_airspeed_kts":423,"filed_airspeed_mach":"","filed_altitude":280,"route":"GTLKE4 ALPHE PMM BAE MCW ONL PORDR AALLE2","actualdeparturetime":1633296640,"estimatedarrivaltime":1633306020,"actualarrivaltime":1633306020,"diverted":"","origin":"KCLE","destination":"KDEN","originName":"Cleveland-Hopkins Intl","originCity":"Cleveland, OH","destinationName":"Denver Intl","destinationCity":"Denver, CO"},{"faFlightID":"UAL1739-1633079891-fa-0007","ident":"UAL1739","aircrafttype":"B738","filed_ete":"01:57:00","filed_time":1633275674,"filed_departuretime":1633276500,"filed_airspeed_kts":453,"filed_airspeed_mach":"","filed_altitude":370,"route":"FATHE1 VIYAP Q69 GURGE Q93 QUIWE SPA J85 HVQ JANYS ROLLN2","actualdeparturetime":1633276480,"estimatedarrivaltime":1633283460,"actualarrivaltime":1633283460,"diverted":"","origin":"KMCO","destination":"KCLE","originName":"Orlando Intl","originCity":"Orlando, FL","destinationName":"Cleveland-Hopkins Intl","destinationCity":"Cleveland, OH"},{"faFlightID":"UAL785-1633006916-fa-0002","ident":"UAL785","aircrafttype":"B738","filed_ete":"01:48:00","filed_time":1633263753,"filed_departuretime":1633264800,"filed_airspeed_kts":443,"filed_airspeed_mach":"","filed_altitude":370,"route":"MMUGS4 LLA LEV Y280 CHRGE PRICY1","actualdeparturetime":1633264800,"estimatedarrivaltime":1633271340,"actualarrivaltime":1633271340,"diverted":"","origin":"KIAH","destination":"KMCO","originName":"Houston Bush Int'ctl","originCity":"Houston, TX","destinationName":"Orlando Intl","destinationCity":"Orlando, FL"}]}}

This is because whenever a flight is diverted, we return multiple entries per flightID. One represents the original plan that diverted, and one represents the new active plan as a result of the diversion. This is what you are seeing with the cutoff in the offset.

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