I just did another run, here are the list of tracks that returned “data not available”, 22 out of 75 requests.
ident aircrafttype actualdeparturetime actualarrivaltime origin destination originName originCity destinationName destinationCity
ROU1846 A319 1445917751 1445924100 CYVR KSFO Vancouver Int'l Vancouver, British Columbia San Francisco Intl San Francisco, CA
SWA450 B737 1445908260 1445923320 KMDW KSFO Chicago Midway Intl Chicago, IL San Francisco Intl San Francisco, CA
AAL1183 A321 1445909150 1445923115 KDFW KSFO Dallas/Fort Worth Intl Dallas-Fort Worth, TX San Francisco Intl San Francisco, CA
FFT667 A320 1445914920 1445922948 KDEN KSFO Denver Intl Denver, CO San Francisco Intl San Francisco, CA
AMX664 7S8 1445907518 1445922781 MMMX KSFO Lic. Benito Juarez Int'l Mexico City San Francisco Intl San Francisco, CA
UAL1699 B739 1445908897 1445922448 KIAH KSFO Houston Bush Int'ctl Houston, TX San Francisco Intl San Francisco, CA
SKW5237 E170 1445913542 1445921663 CYYC KSFO Calgary Int'l Calgary, Alberta San Francisco Intl San Francisco, CA
SKW5385 CRJ 1445916720 1445921280 KRDM KSFO Roberts Field Redmond, OR San Francisco Intl San Francisco, CA
SKW5260 CRJ 1445918520 1445921280 KBFL KSFO Meadows Field Bakersfield, CA San Francisco Intl San Francisco, CA
UAL1251 B752 1445900400 1445920959 KEWR KSFO Newark Liberty Intl Newark, NJ San Francisco Intl San Francisco, CA
SKW5451 CRJ 1445918760 1445920860 KSBP KSFO San Luis County Rgnl San Luis Obispo, CA San Francisco Intl San Francisco, CA
SKW5583 CRJ7 1445914920 1445920800 KSEA KSFO Seattle-Tacoma Intl Seattle, WA San Francisco Intl San Francisco, CA
CPA872 B77W 1445879522 1445920663 VHHH KSFO Hong Kong Int'l Hong Kong San Francisco Intl San Francisco, CA
DAL241 B752 1445903692 1445920289 KATL KSFO Hartsfield-Jackson Intl Atlanta, GA San Francisco Intl San Francisco, CA
SKW5363 CRJ 1445916420 1445920020 KONT KSFO Ontario Intl Ontario, CA San Francisco Intl San Francisco, CA
UAL712 B739 1445901109 1445919822 KIAD KSFO Washington Dulles Intl Washington, DC San Francisco Intl San Francisco, CA
SKW5601 E170 1445913597 1445919587 KPHX KSFO Phoenix Sky Harbor Intl Phoenix, AZ San Francisco Intl San Francisco, CA
UAL384 A320 1445915400 1445919501 KSAN KSFO San Diego Intl San Diego, CA San Francisco Intl San Francisco, CA
SKW6252 CRJ 1445914980 1445919360 KEUG KSFO Mahlon Sweet Field Eugene, OR San Francisco Intl San Francisco, CA
UAL1762 A320 1445898780 1445919120 KPHL KSFO Philadelphia Intl Philadelphia, PA San Francisco Intl San Francisco, CA
UAL1152 B752 1445902560 1445918880 PHLI KSFO Lihue Lihue, HI San Francisco Intl San Francisco, CA
UAL715 A319 1445904780 1445918760 KSTL KSFO Lambert-St Louis Intl St Louis, MO San Francisco Intl San Francisco, CA