Delta Air Lines flight DL 1223: Multiple routes

Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Sat 14:59 Atlanta (ATL) S 16:15 Houston George Bush (IAH) A
DL 1223 Non-stop Airbus A320 (320) 2:16 Effective 2026-01-24 through 2026-02-07
Sun 14:59 Atlanta (ATL) S 16:15 Houston George Bush (IAH) A
DL 1223 Non-stop Airbus A320 (320) 2:16 Operates only on 2026-02-08
Daily 15:15 Atlanta (ATL) S 16:32 Houston George Bush (IAH) A
DL 1223 Non-stop Airbus A320 (320) 2:17 Effective 2026-04-13 through 2026-06-06
Daily 15:15 Atlanta (ATL) S 16:32 Houston George Bush (IAH) A
DL 1223 Non-stop Airbus A321 (321) 2:17 Effective 2026-06-07 through 2026-07-06
Daily 15:15 Atlanta (ATL) S 16:28 Houston George Bush (IAH) A
DL 1223 Non-stop Airbus A321 (321) 2:13 Effective 2026-07-07 through 2026-10-05
Daily 15:15 Atlanta (ATL) S 16:35 Houston George Bush (IAH) A
DL 1223 Non-stop Airbus A321 (321) 2:20 Effective from 2026-10-06
Mon,Thu,Fri,Sun 16:17 Atlanta (ATL) S 17:33 Houston George Bush (IAH) A
DL 1223 Non-stop Airbus A321 (321) 2:16 Valid until 2026-01-04
Sat 16:19 Atlanta (ATL) S 17:35 Houston George Bush (IAH) A
DL 1223 Non-stop Airbus A319 (319) 2:16 Valid until 2026-01-03
Mon-Fri,Sun 16:20 Atlanta (ATL) S 17:35 Houston George Bush (IAH) A
DL 1223 Non-stop Airbus A320 (320) 2:15 Effective 2026-02-12 through 2026-03-06
Mon-Fri,Sun 16:25 Atlanta (ATL) S 17:40 Houston George Bush (IAH) A
DL 1223 Non-stop Airbus A320 (320) 2:15 Effective 2026-01-05 through 2026-01-16
Mon-Fri,Sun 16:25 Atlanta (ATL) S 17:40 Houston George Bush (IAH) A
DL 1223 Non-stop Airbus A320 (320) 2:15 Effective 2026-01-19 through 2026-02-06
Mon-Wed 16:25 Atlanta (ATL) S 17:40 Houston George Bush (IAH) A
DL 1223 Non-stop Airbus A320 (320) 2:15 Effective 2026-02-09 through 2026-02-11
Mon,Thu,Fri,Sun 17:00 Houston George Bush (IAH) A 20:10 Atlanta (ATL) S
DL 1223 Non-stop Airbus A320 (320) 2:10 Effective 2026-05-07 through 2026-05-22
Mon,Thu,Fri,Sun 17:00 Houston George Bush (IAH) A 20:10 Atlanta (ATL) S
DL 1223 Non-stop Airbus A320 (320) 2:10 Effective 2026-05-25 through 2026-06-05
Mon,Thu,Fri,Sun 17:00 Houston George Bush (IAH) A 20:10 Atlanta (ATL) S
DL 1223 Non-stop Airbus A321 (321) 2:10 Effective 2026-06-07 through 2026-07-06
Mon,Thu,Fri,Sun 17:00 Houston George Bush (IAH) A 20:18 Atlanta (ATL) S
DL 1223 Non-stop Airbus A321 (321) 2:18 Effective 2026-07-09 through 2026-08-09
Daily 17:00 Houston George Bush (IAH) A 20:18 Atlanta (ATL) S
DL 1223 Non-stop Airbus A320 (320) 2:18 Effective 2026-08-10 through 2026-09-09
Daily 17:00 Houston George Bush (IAH) A 20:18 Atlanta (ATL) S
DL 1223 Non-stop Airbus A321 (321) 2:18 Effective 2026-09-10 through 2026-10-05
Daily 17:00 Houston George Bush (IAH) A 20:09 Atlanta (ATL) S
DL 1223 Non-stop Airbus A321 (321) 2:09 Effective from 2026-10-06
Sat 17:15 Houston George Bush (IAH) A 20:26 Atlanta (ATL) S
DL 1223 Non-stop Airbus A320 (320) 2:11 Effective 2026-01-24 through 2026-02-07
Sun 17:15 Houston George Bush (IAH) A 20:26 Atlanta (ATL) S
DL 1223 Non-stop Airbus A320 (320) 2:11 Operates only on 2026-02-08
Daily 18:00 Houston George Bush (IAH) A 21:10 Atlanta (ATL) S
DL 1223 Non-stop Airbus A320 (320) 2:10 Effective 2026-04-13 through 2026-05-06
Tue,Wed,Sat 18:00 Houston George Bush (IAH) A 21:10 Atlanta (ATL) S
DL 1223 Non-stop Airbus A320 (320) 2:10 Effective 2026-05-09 through 2026-05-23
Tue,Wed,Sat,Sun 18:00 Houston George Bush (IAH) A 21:10 Atlanta (ATL) S
DL 1223 Non-stop Airbus A320 (320) 2:10 Effective 2026-05-24 through 2026-05-30
Tue,Wed,Sat 18:00 Houston George Bush (IAH) A 21:10 Atlanta (ATL) S
DL 1223 Non-stop Airbus A320 (320) 2:10 Effective 2026-06-02 through 2026-06-06
Sat 18:00 Houston George Bush (IAH) A 21:10 Atlanta (ATL) S
DL 1223 Non-stop Airbus A321 (321) 2:10 Effective 2026-06-13 through 2026-07-04
Sat 18:00 Houston George Bush (IAH) A 21:18 Atlanta (ATL) S
DL 1223 Non-stop Airbus A321 (321) 2:18 Effective 2026-07-11 through 2026-08-08
Sat 18:31 Houston George Bush (IAH) A 21:41 Atlanta (ATL) S
DL 1223 Non-stop Airbus A321 (321) 2:10 Operates only on 2026-02-14
Sat,Sun 18:31 Houston George Bush (IAH) A 21:41 Atlanta (ATL) S
DL 1223 Non-stop Airbus A320 (320) 2:10 Effective 2026-02-15 through 2026-02-21
Sat 18:31 Houston George Bush (IAH) A 21:41 Atlanta (ATL) S
DL 1223 Non-stop Airbus A320 (320) 2:10 Effective 2026-02-28 through 2026-03-07
Mon-Fri 18:32 Houston George Bush (IAH) A 21:42 Atlanta (ATL) S
DL 1223 Non-stop Airbus A320 (320) 2:10 Effective 2026-02-12 through 2026-02-20
Mon-Fri,Sun 18:32 Houston George Bush (IAH) A 21:42 Atlanta (ATL) S
DL 1223 Non-stop Airbus A320 (320) 2:10 Effective 2026-02-22 through 2026-03-06
Mon-Fri,Sun 18:37 Houston George Bush (IAH) A 21:47 Atlanta (ATL) S
DL 1223 Non-stop Airbus A320 (320) 2:10 Effective 2026-01-05 through 2026-01-16
Mon-Fri,Sun 18:37 Houston George Bush (IAH) A 21:47 Atlanta (ATL) S
DL 1223 Non-stop Airbus A320 (320) 2:10 Effective 2026-01-19 through 2026-02-06
Mon-Wed 18:37 Houston George Bush (IAH) A 21:47 Atlanta (ATL) S
DL 1223 Non-stop Airbus A320 (320) 2:10 Effective 2026-02-09 through 2026-02-11
Sat 18:38 Houston George Bush (IAH) A 21:50 Atlanta (ATL) S
DL 1223 Non-stop Airbus A319 (319) 2:12 Valid until 2026-01-03
Mon,Thu,Fri,Sun 18:38 Houston George Bush (IAH) A 21:50 Atlanta (ATL) S
DL 1223 Non-stop Airbus A321 (321) 2:12 Valid until 2026-01-04
Daily 22:59 Seattle-Tacoma (SEA) 00:06 Spokane (GEG)
DL 1223 Non-stop Airbus A220-100 (221) 1:07 Effective 2026-03-08 through 2026-03-14
The flight arrives 1 day after departure.
Daily 22:59 Seattle-Tacoma (SEA) 00:07 Spokane (GEG)
DL 1223 Non-stop Airbus A220-100 (221) 1:08 Effective 2026-03-15 through 2026-04-12
The flight arrives 1 day after departure.
This flight number is listed as serving the following routes:


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Delta Air Lines flight DL 1223: Multiple routes
Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Delta Air Lines DL1223
14:59
Atlanta (ATL) S

16:15
Houston George Bush (IAH) A
Effective 2026-01-24 through 2026-02-07
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 2:16, non-stop
Airbus A320 (320)
Direct Flights:
Delta Air Lines DL1223
14:59
Atlanta (ATL) S

16:15
Houston George Bush (IAH) A
Operates only on 2026-02-08
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:16, non-stop
Airbus A320 (320)
Direct Flights:
Delta Air Lines DL1223
15:15
Atlanta (ATL) S

16:32
Houston George Bush (IAH) A
Effective 2026-04-13 through 2026-06-06
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:17, non-stop
Airbus A320 (320)
Direct Flights:
Delta Air Lines DL1223
15:15
Atlanta (ATL) S

16:32
Houston George Bush (IAH) A
Effective 2026-06-07 through 2026-07-06
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:17, non-stop
Airbus A321 (321)
Direct Flights:
Delta Air Lines DL1223
15:15
Atlanta (ATL) S

16:28
Houston George Bush (IAH) A
Effective 2026-07-07 through 2026-10-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:13, non-stop
Airbus A321 (321)
Direct Flights:
Delta Air Lines DL1223
15:15
Atlanta (ATL) S

16:35
Houston George Bush (IAH) A
Effective from 2026-10-06
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:20, non-stop
Airbus A321 (321)
Direct Flights:
Delta Air Lines DL1223
16:17
Atlanta (ATL) S

17:33
Houston George Bush (IAH) A
Valid until 2026-01-04
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 2:16, non-stop
Airbus A321 (321)
Direct Flights:
Delta Air Lines DL1223
16:19
Atlanta (ATL) S

17:35
Houston George Bush (IAH) A
Valid until 2026-01-03
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 2:16, non-stop
Airbus A319 (319)
Direct Flights:
Delta Air Lines DL1223
16:20
Atlanta (ATL) S

17:35
Houston George Bush (IAH) A
Effective 2026-02-12 through 2026-03-06
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 2:15, non-stop
Airbus A320 (320)
Direct Flights:
Delta Air Lines DL1223
16:25
Atlanta (ATL) S

17:40
Houston George Bush (IAH) A
Effective 2026-01-05 through 2026-01-16
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 2:15, non-stop
Airbus A320 (320)
Direct Flights:
Delta Air Lines DL1223
16:25
Atlanta (ATL) S

17:40
Houston George Bush (IAH) A
Effective 2026-01-19 through 2026-02-06
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 2:15, non-stop
Airbus A320 (320)
Direct Flights:
Delta Air Lines DL1223
16:25
Atlanta (ATL) S

17:40
Houston George Bush (IAH) A
Effective 2026-02-09 through 2026-02-11
Mon
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:15, non-stop
Airbus A320 (320)
Direct Flights:
Delta Air Lines DL1223
17:00
Houston George Bush (IAH) A

20:10
Atlanta (ATL) S
Effective 2026-05-07 through 2026-05-22
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 2:10, non-stop
Airbus A320 (320)
Direct Flights:
Delta Air Lines DL1223
17:00
Houston George Bush (IAH) A

20:10
Atlanta (ATL) S
Effective 2026-05-25 through 2026-06-05
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 2:10, non-stop
Airbus A320 (320)
Direct Flights:
Delta Air Lines DL1223
17:00
Houston George Bush (IAH) A

20:10
Atlanta (ATL) S
Effective 2026-06-07 through 2026-07-06
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 2:10, non-stop
Airbus A321 (321)
Direct Flights:
Delta Air Lines DL1223
17:00
Houston George Bush (IAH) A

20:18
Atlanta (ATL) S
Effective 2026-07-09 through 2026-08-09
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 2:18, non-stop
Airbus A321 (321)
Direct Flights:
Delta Air Lines DL1223
17:00
Houston George Bush (IAH) A

20:18
Atlanta (ATL) S
Effective 2026-08-10 through 2026-09-09
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:18, non-stop
Airbus A320 (320)
Direct Flights:
Delta Air Lines DL1223
17:00
Houston George Bush (IAH) A

20:18
Atlanta (ATL) S
Effective 2026-09-10 through 2026-10-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:18, non-stop
Airbus A321 (321)
Direct Flights:
Delta Air Lines DL1223
17:00
Houston George Bush (IAH) A

20:09
Atlanta (ATL) S
Effective from 2026-10-06
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:09, non-stop
Airbus A321 (321)
Direct Flights:
Delta Air Lines DL1223
17:15
Houston George Bush (IAH) A

20:26
Atlanta (ATL) S
Effective 2026-01-24 through 2026-02-07
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 2:11, non-stop
Airbus A320 (320)
Direct Flights:
Delta Air Lines DL1223
17:15
Houston George Bush (IAH) A

20:26
Atlanta (ATL) S
Operates only on 2026-02-08
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:11, non-stop
Airbus A320 (320)
Direct Flights:
Delta Air Lines DL1223
18:00
Houston George Bush (IAH) A

21:10
Atlanta (ATL) S
Effective 2026-04-13 through 2026-05-06
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:10, non-stop
Airbus A320 (320)
Direct Flights:
Delta Air Lines DL1223
18:00
Houston George Bush (IAH) A

21:10
Atlanta (ATL) S
Effective 2026-05-09 through 2026-05-23
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
Sun
-
Duration: 2:10, non-stop
Airbus A320 (320)
Direct Flights:
Delta Air Lines DL1223
18:00
Houston George Bush (IAH) A

21:10
Atlanta (ATL) S
Effective 2026-05-24 through 2026-05-30
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
Sun
Duration: 2:10, non-stop
Airbus A320 (320)
Direct Flights:
Delta Air Lines DL1223
18:00
Houston George Bush (IAH) A

21:10
Atlanta (ATL) S
Effective 2026-06-02 through 2026-06-06
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
Sun
-
Duration: 2:10, non-stop
Airbus A320 (320)
Direct Flights:
Delta Air Lines DL1223
18:00
Houston George Bush (IAH) A

21:10
Atlanta (ATL) S
Effective 2026-06-13 through 2026-07-04
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 2:10, non-stop
Airbus A321 (321)
Direct Flights:
Delta Air Lines DL1223
18:00
Houston George Bush (IAH) A

21:18
Atlanta (ATL) S
Effective 2026-07-11 through 2026-08-08
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 2:18, non-stop
Airbus A321 (321)
Direct Flights:
Delta Air Lines DL1223
18:31
Houston George Bush (IAH) A

21:41
Atlanta (ATL) S
Operates only on 2026-02-14
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 2:10, non-stop
Airbus A321 (321)
Direct Flights:
Delta Air Lines DL1223
18:31
Houston George Bush (IAH) A

21:41
Atlanta (ATL) S
Effective 2026-02-15 through 2026-02-21
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
Duration: 2:10, non-stop
Airbus A320 (320)
Direct Flights:
Delta Air Lines DL1223
18:31
Houston George Bush (IAH) A

21:41
Atlanta (ATL) S
Effective 2026-02-28 through 2026-03-07
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 2:10, non-stop
Airbus A320 (320)
Direct Flights:
Delta Air Lines DL1223
18:32
Houston George Bush (IAH) A

21:42
Atlanta (ATL) S
Effective 2026-02-12 through 2026-02-20
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
-
Duration: 2:10, non-stop
Airbus A320 (320)
Direct Flights:
Delta Air Lines DL1223
18:32
Houston George Bush (IAH) A

21:42
Atlanta (ATL) S
Effective 2026-02-22 through 2026-03-06
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 2:10, non-stop
Airbus A320 (320)
Direct Flights:
Delta Air Lines DL1223
18:37
Houston George Bush (IAH) A

21:47
Atlanta (ATL) S
Effective 2026-01-05 through 2026-01-16
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 2:10, non-stop
Airbus A320 (320)
Direct Flights:
Delta Air Lines DL1223
18:37
Houston George Bush (IAH) A

21:47
Atlanta (ATL) S
Effective 2026-01-19 through 2026-02-06
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 2:10, non-stop
Airbus A320 (320)
Direct Flights:
Delta Air Lines DL1223
18:37
Houston George Bush (IAH) A

21:47
Atlanta (ATL) S
Effective 2026-02-09 through 2026-02-11
Mon
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:10, non-stop
Airbus A320 (320)
Direct Flights:
Delta Air Lines DL1223
18:38
Houston George Bush (IAH) A

21:50
Atlanta (ATL) S
Valid until 2026-01-03
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 2:12, non-stop
Airbus A319 (319)
Direct Flights:
Delta Air Lines DL1223
18:38
Houston George Bush (IAH) A

21:50
Atlanta (ATL) S
Valid until 2026-01-04
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 2:12, non-stop
Airbus A321 (321)
Direct Flights:
Delta Air Lines DL1223
22:59
Seattle-Tacoma (SEA)

00:06(+1)
Spokane (GEG)
Effective 2026-03-08 through 2026-03-14
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:07, non-stop
Airbus A220-100 (221)
The flight arrives 1 day after departure.
Direct Flights:
Delta Air Lines DL1223
22:59
Seattle-Tacoma (SEA)

00:07(+1)
Spokane (GEG)
Effective 2026-03-15 through 2026-04-12
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:08, non-stop
Airbus A220-100 (221)
The flight arrives 1 day after departure.
This flight number is listed as serving the following routes:
  • Atlanta (ATL) - Houston George Bush (IAH)
  • Seattle-Tacoma (SEA) - Spokane (GEG)
All Delta Air Lines flights
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