Delta Air Lines flight DL 1644: Multiple routes

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FLIGHT SCHEDULE
Direct Flights:
Mon-Sat 06:00 Richmond (RIC) 07:58 Detroit (DTW) M
DL 1644 Non-stop Airbus A319 (319) 1:58 Effective 2026-01-20 through 2026-02-07
Mon 06:00 Richmond (RIC) 07:54 Detroit (DTW) M
DL 1644 Non-stop Airbus A319 (319) 1:54 Operates only on 2026-02-09
Tue 06:00 Richmond (RIC) 07:58 Detroit (DTW) M
DL 1644 Non-stop Airbus A319 (319) 1:58 Operates only on 2026-02-10
Mon-Fri 11:00 Atlanta (ATL) S 12:38 Austin (AUS)
DL 1644 Non-stop Airbus A321 (321) 2:38 Effective 2026-02-12 through 2026-02-20
Mon-Fri,Sun 11:00 Atlanta (ATL) S 12:38 Austin (AUS)
DL 1644 Non-stop Airbus A321 (321) 2:38 Effective 2026-02-22 through 2026-03-06
Daily 12:43 Charlotte (CLT) 14:00 Atlanta (ATL) S
DL 1644 Non-stop Boeing 717 (717) 1:17 Effective 2026-03-08 through 2026-04-12
Mon-Fri 13:44 Austin (AUS) 16:54 Atlanta (ATL) S
DL 1644 Non-stop Airbus A321 (321) 2:10 Effective 2026-02-12 through 2026-02-20
Mon-Fri,Sun 13:44 Austin (AUS) 16:54 Atlanta (ATL) S
DL 1644 Non-stop Airbus A321 (321) 2:10 Effective 2026-02-22 through 2026-03-06
Mon,Tue,Fri,Sun 16:12 Atlanta (ATL) S 16:35 Gulfport/Biloxi (GPT)
DL 1644 Non-stop Boeing 717 (717) 1:23 Valid until 2026-01-04
Mon-Fri,Sun 17:21 Gulfport/Biloxi (GPT) 19:51 Atlanta (ATL) S
DL 1644 Non-stop Boeing 717 (717) 1:30 Valid until 2026-01-04
Sat 19:21 Fort Myers (RSW) 22:16 Detroit (DTW) M
DL 1644 Non-stop Boeing 757-300 (753) 2:55 Operates only on 2026-01-03
Mon-Fri,Sun 20:25 Detroit (DTW) M 21:38 Denver (DEN)
DL 1644 Non-stop Airbus A320 (320) 3:13 Effective 2026-04-13 through 2026-05-22
Mon-Fri,Sun 20:25 Detroit (DTW) M 21:38 Denver (DEN)
DL 1644 Non-stop Airbus A320 (320) 3:13 Effective 2026-05-25 through 2026-09-04
Mon-Fri,Sun 20:25 Detroit (DTW) M 21:38 Denver (DEN)
DL 1644 Non-stop Airbus A320 (320) 3:13 Effective 2026-09-07 through 2026-10-05
Mon-Fri,Sun 20:25 Detroit (DTW) M 21:40 Denver (DEN)
DL 1644 Non-stop Airbus A320 (320) 3:15 Effective from 2026-10-06
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This flight number is listed as serving the following routes:
Delta Air Lines flight DL 1644: Multiple routes
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Select flight date:
FLIGHT SCHEDULE
Direct Flights:

Delta Air Lines DL1644
Effective 2026-01-20 through 2026-02-07
Mon
Tue
Wed
Thu
Fri
Sat
Sun
-
Duration: 1:58, non-stop
Airbus A319 (319)

Direct Flights:

Delta Air Lines DL1644
Operates only on 2026-02-09
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:54, non-stop
Airbus A319 (319)

Direct Flights:

Delta Air Lines DL1644
Operates only on 2026-02-10
Mon
-
Tue
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:58, non-stop
Airbus A319 (319)

Direct Flights:

Delta Air Lines DL1644
11:00

12:38
Effective 2026-02-12 through 2026-02-20
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
-
Duration: 2:38, non-stop
Airbus A321 (321)

Direct Flights:

Delta Air Lines DL1644
11:00

12:38
Effective 2026-02-22 through 2026-03-06
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 2:38, non-stop
Airbus A321 (321)

Direct Flights:

Delta Air Lines DL1644
Effective 2026-03-08 through 2026-04-12
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:17, non-stop
Boeing 717 (717)

Direct Flights:

Delta Air Lines DL1644
13:44

16:54
Effective 2026-02-12 through 2026-02-20
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
-
Duration: 2:10, non-stop
Airbus A321 (321)

Direct Flights:

Delta Air Lines DL1644
13:44

16:54
Effective 2026-02-22 through 2026-03-06
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 2:10, non-stop
Airbus A321 (321)

Direct Flights:

Delta Air Lines DL1644
Valid until 2026-01-04
Mon
Tue
Wed
-
Thu
-
Fri
Sat
-
Sun
Duration: 1:23, non-stop
Boeing 717 (717)

Direct Flights:

Delta Air Lines DL1644
Valid until 2026-01-04
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 1:30, non-stop
Boeing 717 (717)

Direct Flights:

Delta Air Lines DL1644
Operates only on 2026-01-03
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 2:55, non-stop
Boeing 757-300 (753)

Direct Flights:

Delta Air Lines DL1644
20:25

21:38
Effective 2026-04-13 through 2026-05-22
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 3:13, non-stop
Airbus A320 (320)

Direct Flights:

Delta Air Lines DL1644
20:25

21:38
Effective 2026-05-25 through 2026-09-04
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 3:13, non-stop
Airbus A320 (320)

Direct Flights:

Delta Air Lines DL1644
20:25

21:38
Effective 2026-09-07 through 2026-10-05
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 3:13, non-stop
Airbus A320 (320)

Direct Flights:

Delta Air Lines DL1644
20:25

21:40
Effective from 2026-10-06
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 3:15, non-stop
Airbus A320 (320)
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This flight number is listed as serving the following routes:
  • Atlanta (ATL) - Austin (AUS)
  • Charlotte (CLT) - Atlanta (ATL)
  • Detroit (DTW) - Denver (DEN)
  • Fort Myers (RSW) - Detroit (DTW)
  • Gulfport/Biloxi (GPT) - Atlanta (ATL)
  • Richmond (RIC) - Detroit (DTW)