Is Delta flying slow?


#1

Over the last few weeks, DL 317 has gone from a scheduled 9 hour flight to almost 10 hours (scheduled). Are they slowing down to save fuel? Doesn’t that hurt by putting more airmiles on the planes?


#2

Hi, JeffSheets and welcome to FlightAware. Perhaps what you’re seeing is the result of a seasonal wind change? Here’s the departure time (Zulu), airspeed, and filed enroute time for the last couple months.



 2005-10-01 16:25:00 |                469 | 09:10:00
 2005-10-02 16:26:00 |                474 | 08:58:00
 2005-10-03 16:28:00 |                472 | 08:59:00
 2005-10-04 16:18:00 |                471 | 08:59:00
 2005-10-05 16:22:00 |                473 | 09:02:00
 2005-10-06 19:36:00 |                475 | 08:53:00
 2005-10-07 16:33:00 |                472 | 08:50:00
 2005-10-08 16:35:00 |                469 | 08:55:00
 2005-10-09 16:21:00 |                469 | 09:06:00
 2005-10-13 16:22:00 |                474 | 08:52:00
 2005-10-11 16:20:00 |                475 | 08:53:00
 2005-10-12 16:23:00 |                475 | 08:54:00
 2005-10-10 16:27:00 |                480 | 09:01:00
 2005-10-14 16:27:00 |                479 | 08:55:00
 2005-10-16 16:27:00 |                478 | 09:04:00
 2005-10-15 16:27:00 |                480 | 09:10:00
 2005-10-17 16:21:00 |                474 | 09:06:00
 2005-10-18 16:26:00 |                468 | 08:59:00
 2005-10-20 16:27:00 |                479 | 09:19:00
 2005-10-21 16:25:00 |                478 | 09:11:00
 2005-10-22 16:22:00 |                478 | 09:18:00
 2005-10-23 16:23:00 |                482 | 09:13:00
 2005-10-24 16:22:00 |                482 | 09:04:00
 2005-10-25 16:21:00 |                477 | 09:18:00
 2005-10-26 16:28:00 |                477 | 09:15:00
 2005-10-27 16:28:00 |                474 | 09:12:00
 2005-10-28 16:51:00 |                466 | 09:14:00
 2005-10-29 16:19:00 |                465 | 09:17:00
 2005-10-30 17:29:00 |                471 | 09:17:00
 2005-10-31 17:22:00 |                471 | 09:17:00
 2005-11-01 17:32:00 |                470 | 09:11:00
 2005-11-02 17:28:00 |                468 | 08:58:00
 2005-11-03 17:22:00 |                469 | 08:57:00
 2005-11-04 17:19:00 |                479 | 09:28:00
 2005-11-05 17:44:00 |                480 | 09:21:00
 2005-11-06 17:26:00 |                480 | 09:26:00
 2005-11-07 17:22:00 |                469 | 09:19:00
 2005-11-08 17:22:00 |                477 | 09:06:00
 2005-11-09 17:19:00 |                478 | 09:06:00
 2005-11-10 17:29:00 |                475 | 09:06:00
 2005-11-11 17:19:00 |                470 | 09:04:00
 2005-11-12 17:18:00 |                477 | 08:59:00
 2005-11-13 17:22:00 |                477 | 09:07:00
 2005-11-14 17:22:00 |                476 | 09:06:00
 2005-11-15 17:32:00 |                476 | 09:17:00
 2005-11-16 17:23:00 |                482 | 09:06:00
 2005-11-17 17:24:00 |                479 | 09:13:00
 2005-11-18 17:24:00 |                480 | 09:02:00
 2005-11-19 17:22:00 |                475 | 09:06:00
 2005-11-20 17:19:00 |                476 | 09:00:00
 2005-11-21 17:15:00 |                465 | 08:58:00
 2005-11-22 17:31:00 |                474 | 09:12:00
 2005-11-23 17:21:00 |                475 | 09:14:00
 2005-11-24 17:26:00 |                477 | 09:19:00
 2005-11-26 17:19:00 |                473 | 09:32:00
 2005-11-25 17:21:00 |                481 | 09:23:00
 2005-11-27 17:19:00 |                479 | 09:31:00
 2005-11-28 17:24:00 |                479 | 09:35:00
 2005-11-29 18:11:00 |                469 | 09:37:00
 2005-11-30 17:19:00 |                467 | 09:36:00
 2005-12-01 17:22:00 |                484 | 09:49:00
 2005-12-02 18:29:00 |                468 | 09:51:00
 2005-12-03 17:27:00 |                465 | 09:49:00
 2005-12-04 17:32:00 |                482 | 09:40:00
 2005-12-05 17:33:00 |                477 | 09:36:00
 2005-12-06 17:19:00 |                478 | 09:48:00
 2005-12-07 17:25:00 |                484 | 09:16:00
 2005-12-08 17:30:00 |                468 | 09:01:00
 2005-12-09 17:36:00 |                478 | 08:46:00
 2005-12-10 17:18:00 |                472 | 09:13:00
 2005-12-11 17:38:00 |                471 | 09:14:00
 2005-12-13 17:21:00 |                478 | 09:24:00
 2005-12-12 17:22:00 |                471 | 09:38:00
 2005-12-14 17:23:00 |                481 | 09:17:00
 2005-12-15 17:49:00 |                459 | 09:31:00
 2005-12-16 17:23:00 |                485 | 09:38:00
 2005-12-17 18:29:00 |                483 | 09:46:00
 2005-12-18 17:22:00 |                483 | 09:55:00
 2005-12-19 17:20:00 |                481 | 09:47:00
 2005-12-20 17:48:00 |                467 | 09:24:00
 2005-12-21 17:52:00 |                460 | 09:13:00
 2005-12-22 17:27:00 |                459 | 09:14:00
 2005-12-23 17:30:00 |                462 | 09:25:00
 2005-12-24 17:18:00 |                471 | 09:05:00
 2005-12-25 17:28:00 |                465 | 09:19:00
 2005-12-26 17:24:00 |                474 | 09:21:00
 2005-12-27 17:22:00 |                470 | 09:21:00
 2005-12-28 17:27:00 |                467 | 09:20:00
 2005-12-29 17:26:00 |                479 | 09:10:00
 2005-12-30 17:24:00 |                480 | 09:13:00
 2005-12-31 17:21:00 |                479 | 09:19:00
 2006-01-01 17:16:00 |                481 | 09:37:00
 2006-01-02 20:02:00 |                473 | 09:48:00
 2006-01-03 17:58:00 |                484 | 09:41:00



#3

Seasonal wind change is definitely what you’re seeing. As a pilot at Delta, I can tell you that there has been no move to reduce cruise speeds in order to save fuel. We cruise at whatever the optimum altitude is for the current wind/temp/turbulence/weight situation.

Isaac


#4

Date Type Origin Destination Departure Arrival Duration
04-Jan-2006 B764/Q Hartsfield Jackson Atlanta Int’l [KATL] Honolulu Int’l [PHNL] 01:33PM EST 06:23PM HST En Route
03-Jan-2006 B764/Q Hartsfield Jackson Atlanta Int’l [KATL] Honolulu Int’l [PHNL] 12:58PM EST 10:05AM HST 2:07
02-Jan-2006 B764/Q Hartsfield Jackson Atlanta Int’l [KATL] Honolulu Int’l [PHNL] 03:02PM EST 07:44PM HST 9:42
01-Jan-2006 B764/Q Hartsfield Jackson Atlanta Int’l [KATL] Honolulu Int’l [PHNL] 12:16PM EST 04:46PM HST 9:30
31-Dec-2005 B764/Q Hartsfield Jackson Atlanta Int’l [KATL] Honolulu Int’l [PHNL] 12:21PM EST 04:31PM HST 9:10
30-Dec-2005 B764/Q Hartsfield Jackson Atlanta Int’l [KATL] Honolulu Int’l [PHNL] 12:24PM EST 04:24PM HST 9:00
29-Dec-2005 B764/Q Hartsfield Jackson Atlanta Int’l [KATL] Honolulu Int’l [PHNL] 12:26PM EST 04:24PM HST 8:58
28-Dec-2005 B764/Q Hartsfield Jackson Atlanta Int’l [KATL] Honolulu Int’l [PHNL] 12:27PM EST result unknown (?) n/a
27-Dec-2005 B764/Q Hartsfield Jackson Atlanta Int’l [KATL] Honolulu Int’l [PHNL] 12:22PM EST 04:37PM HST 9:15
26-Dec-2005 B764/Q Hartsfield Jackson Atlanta Int’l [KATL] Honolulu Int’l [PHNL] 12:24PM EST 04:32PM HST 9:08
25-Dec-2005 B764/Q Hartsfield Jackson Atlanta Int’l [KATL] Honolulu Int’l [PHNL] 12:28PM EST 04:47PM HST 9:19
24-Dec-2005 B764/Q Hartsfield Jackson Atlanta Int’l [KATL] Honolulu Int’l [PHNL] 12:18PM EST 04:17PM HST 8:59
23-Dec-2005 B764/Q Hartsfield Jackson Atlanta Int’l [KATL] Honolulu Int’l [PHNL] 12:30PM EST 04:47PM HST 9:17
22-Dec-2005 B764/Q Hartsfield Jackson Atlanta Int’l [KATL] Honolulu Int’l [PHNL] 12:27PM EST 04:33PM HST 9:06


#5

Swissflight:

What is the difference between a B764/J and a B764/Q?

Thanks


#6

What is the suffix that’s appended to an aircraft type, such as C172/G or B738/Q?


#7

Aircraft Equipment Suffixes

NO DME

/X No transponder
/T Transponder with no Mode C
/U Transponder with Mode C

DME

/D No transponder
/B Transponder with no Mode C
/A Transponder with Mode C

TACAN ONLY

/M No transponder
/N Transponder with no Mode C
/P Transponder with Mode C

AREA NAVIGATION (RNAV)

/Y LORAN, VOR/DME, or INS with no transponder
/C LORAN, VOR/DME, or INS, transponder with no Mode C
/I LORAN, VOR/DME, or INS, transponder with Mode C

ADVANCED RNAV WITH TRANSPONDER AND MODE C (If an aircraft is unable to operate with a transponder and/or Mode C, it will revert to the appropriate code listed above under Area Navigation.)

/E Flight Management System (FMS) with DME/DME and IRU position updating
/F Flight Management System (FMS) with DME/DME position updating
/G Global Navigation Satellite System (GNSS), including GPS or WAAS, with en route and terminal capability
/R Required Navigational Performance. The aircraft meets the RNP type prescribed for the route segment(s), route(s) and/or area concerned.

REDUCED VERTICAL SEPARATION MINIMUM (RVSM). Prior to conducting RVSM operations within the U.S., the operator must obtain authorization from the FAA or from the responsible authority, as appropriate.

/J /E with RVSM
/K /F with RVSM
/L /G with RVSM
/Q /R with RVSM
/W RVSM

(from faa.gov/ATPubs/ATC/Chp2/atc0203.html)