United Airlines flight UA 1640: Multiple routes

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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Daily 11:00 Chicago O'Hare (ORD) 1 12:50 Phoenix Sky Harbor (PHX) 3
UA 1640 Non-stop Airbus A321neo (32Q) 3:50 Effective 2025-09-25 through 2025-10-25
Mon,Tue,Thu,Fri,Sun 11:05 Chicago O'Hare (ORD) 1 13:10 Phoenix Sky Harbor (PHX) 3
UA 1640 Non-stop Boeing 737-900 (739) 4:05 Valid until 2025-05-09
Sat 11:05 Chicago O'Hare (ORD) 1 13:10 Phoenix Sky Harbor (PHX) 3
UA 1640 Non-stop Boeing 737-800 (738) 4:05 Operates only on 2025-05-03
Wed,Sat,Sun 11:05 Chicago O'Hare (ORD) 1 13:10 Phoenix Sky Harbor (PHX) 3
UA 1640 Non-stop Boeing 737 MAX 9 (7M9) 4:05 Effective 2025-05-07 through 2025-05-11
Mon-Fri 11:05 Chicago O'Hare (ORD) 1 13:10 Phoenix Sky Harbor (PHX) 3
UA 1640 Non-stop Boeing 737-900 (739) 4:05 Effective 2025-05-12 through 2025-05-20
Sat,Sun 11:05 Chicago O'Hare (ORD) 1 13:10 Phoenix Sky Harbor (PHX) 3
UA 1640 Non-stop Boeing 737 MAX 9 (7M9) 4:05 Effective 2025-05-17 through 2025-05-18
Daily 11:10 Chicago O'Hare (ORD) 1 12:57 Phoenix Sky Harbor (PHX) 3
UA 1640 Non-stop Boeing 737-900 (739) 3:47 Effective 2025-10-26 through 2025-11-01
Daily 11:10 Chicago O'Hare (ORD) 1 13:57 Phoenix Sky Harbor (PHX) 3
UA 1640 Non-stop Boeing 737-900 (739) 3:47 Effective 2025-11-02 through 2025-12-17
Daily 11:10 Chicago O'Hare (ORD) 1 14:00 Phoenix Sky Harbor (PHX) 3
UA 1640 Non-stop Boeing 737-900 (739) 3:50 Effective 2025-12-18 through 2026-01-05
Daily 11:10 Chicago O'Hare (ORD) 1 13:57 Phoenix Sky Harbor (PHX) 3
UA 1640 Non-stop Boeing 737-900 (739) 3:47 Effective 2026-01-06 through 2026-02-11
Daily 11:15 Chicago O'Hare (ORD) 1 14:05 Phoenix Sky Harbor (PHX) 3
UA 1640 Non-stop Boeing 737-900 (739) 3:50 Effective from 2026-02-12
Daily 16:30 Phoenix Sky Harbor (PHX) 3 17:44 San Francisco (SFO) 3
UA 1640 Non-stop Boeing 737-800 (738) 2:14 Effective 2025-12-18 through 2026-01-05
Daily 16:32 Phoenix Sky Harbor (PHX) 3 17:46 San Francisco (SFO) 3
UA 1640 Non-stop Boeing 737-800 (738) 2:14 Effective from 2026-02-12
Daily 16:35 Phoenix Sky Harbor (PHX) 3 17:49 San Francisco (SFO) 3
UA 1640 Non-stop Boeing 737-800 (738) 2:14 Effective 2025-11-02 through 2025-12-01
Daily 16:40 Phoenix Sky Harbor (PHX) 3 17:42 San Francisco (SFO) 3
UA 1640 Non-stop Boeing 737-800 (738) 2:02 Effective 2025-12-02 through 2025-12-17
Daily 16:40 Phoenix Sky Harbor (PHX) 3 17:42 San Francisco (SFO) 3
UA 1640 Non-stop Boeing 737-800 (738) 2:02 Effective 2026-01-06 through 2026-02-11
Wed 20:44 Fairbanks (FAI) 05:51 Chicago O'Hare (ORD) 1
UA 1640 Non-stop Boeing 737 MAX 8 (7M8) 6:07 Operates only on 2025-05-21
The flight arrives 1 day after departure.
Daily 20:50 Fairbanks (FAI) 05:54 Chicago O'Hare (ORD) 1
UA 1640 Non-stop Boeing 737 MAX 8 (7M8) 6:04 Effective 2025-06-01 through 2025-06-25
The flight arrives 1 day after departure.
Daily 20:53 Fairbanks (FAI) 05:57 Chicago O'Hare (ORD) 1
UA 1640 Non-stop Boeing 737 MAX 8 (7M8) 6:04 Effective 2025-06-26 through 2025-08-18
The flight arrives 1 day after departure.
Daily 20:59 Fairbanks (FAI) 05:57 Chicago O'Hare (ORD) 1
UA 1640 Non-stop Boeing 737 MAX 8 (7M8) 5:58 Effective 2025-08-19 through 2025-09-06
The flight arrives 1 day after departure.
Daily 21:10 Fairbanks (FAI) 06:14 Chicago O'Hare (ORD) 1
UA 1640 Non-stop Boeing 737 MAX 8 (7M8) 6:04 Effective 2025-05-22 through 2025-05-31
The flight arrives 1 day after departure.
Daily 22:34 Anchorage (ANC) S 08:27 George Bush, Houston (IAH) C
UA 1640 Non-stop Boeing 737 MAX 8 (7M8) 6:53 Effective 2025-09-07 through 2025-09-24
The flight arrives 1 day after departure.
Non-Direct Flights:
Daily 11:10 Chicago O'Hare (ORD) 1 17:49 San Francisco (SFO) 3
UA 1640 1-stop Boeing 737-900 (739) 8:39 Effective 2025-11-02 through 2025-12-01
Daily 11:10 Chicago O'Hare (ORD) 1 17:42 San Francisco (SFO) 3
UA 1640 1-stop Boeing 737-900 (739) 8:32 Effective 2025-12-02 through 2025-12-17
Daily 11:10 Chicago O'Hare (ORD) 1 17:44 San Francisco (SFO) 3
UA 1640 1-stop Boeing 737-900 (739) 8:34 Effective 2025-12-18 through 2026-01-05
Daily 11:10 Chicago O'Hare (ORD) 1 17:42 San Francisco (SFO) 3
UA 1640 1-stop Boeing 737-900 (739) 8:32 Effective 2026-01-06 through 2026-02-11
Daily 11:15 Chicago O'Hare (ORD) 1 17:46 San Francisco (SFO) 3
UA 1640 1-stop Boeing 737-900 (739) 8:31 Effective from 2026-02-12
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This flight number is listed as serving the following routes:


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United Airlines flight UA 1640: Multiple routes
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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
United Airlines UA1640
11:00
Chicago O'Hare (ORD) 1

12:50
Phoenix Sky Harbor (PHX) 3
Effective 2025-09-25 through 2025-10-25
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 3:50, non-stop
Airbus A321neo (32Q)
United Airlines UA1640
11:05
Chicago O'Hare (ORD) 1

13:10
Phoenix Sky Harbor (PHX) 3
Valid until 2025-05-09
Mon
Tue
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 4:05, non-stop
Boeing 737-900 (739)
United Airlines UA1640
11:05
Chicago O'Hare (ORD) 1

13:10
Phoenix Sky Harbor (PHX) 3
Operates only on 2025-05-03
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 4:05, non-stop
Boeing 737-800 (738)
United Airlines UA1640
11:05
Chicago O'Hare (ORD) 1

13:10
Phoenix Sky Harbor (PHX) 3
Effective 2025-05-07 through 2025-05-11
Mon
-
Tue
-
Wed
Thu
-
Fri
-
Sat
Sun
Duration: 4:05, non-stop
Boeing 737 MAX 9 (7M9)
United Airlines UA1640
11:05
Chicago O'Hare (ORD) 1

13:10
Phoenix Sky Harbor (PHX) 3
Effective 2025-05-12 through 2025-05-20
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
-
Duration: 4:05, non-stop
Boeing 737-900 (739)
United Airlines UA1640
11:05
Chicago O'Hare (ORD) 1

13:10
Phoenix Sky Harbor (PHX) 3
Effective 2025-05-17 through 2025-05-18
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
Duration: 4:05, non-stop
Boeing 737 MAX 9 (7M9)
United Airlines UA1640
11:10
Chicago O'Hare (ORD) 1

12:57
Phoenix Sky Harbor (PHX) 3
Effective 2025-10-26 through 2025-11-01
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 3:47, non-stop
Boeing 737-900 (739)
United Airlines UA1640
11:10
Chicago O'Hare (ORD) 1

13:57
Phoenix Sky Harbor (PHX) 3
Effective 2025-11-02 through 2025-12-17
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 3:47, non-stop
Boeing 737-900 (739)
United Airlines UA1640
11:10
Chicago O'Hare (ORD) 1

14:00
Phoenix Sky Harbor (PHX) 3
Effective 2025-12-18 through 2026-01-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 3:50, non-stop
Boeing 737-900 (739)
United Airlines UA1640
11:10
Chicago O'Hare (ORD) 1

13:57
Phoenix Sky Harbor (PHX) 3
Effective 2026-01-06 through 2026-02-11
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 3:47, non-stop
Boeing 737-900 (739)
United Airlines UA1640
11:15
Chicago O'Hare (ORD) 1

14:05
Phoenix Sky Harbor (PHX) 3
Effective from 2026-02-12
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 3:50, non-stop
Boeing 737-900 (739)
United Airlines UA1640
16:30
Phoenix Sky Harbor (PHX) 3

17:44
San Francisco (SFO) 3
Effective 2025-12-18 through 2026-01-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:14, non-stop
Boeing 737-800 (738)
United Airlines UA1640
16:32
Phoenix Sky Harbor (PHX) 3

17:46
San Francisco (SFO) 3
Effective from 2026-02-12
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:14, non-stop
Boeing 737-800 (738)
United Airlines UA1640
16:35
Phoenix Sky Harbor (PHX) 3

17:49
San Francisco (SFO) 3
Effective 2025-11-02 through 2025-12-01
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:14, non-stop
Boeing 737-800 (738)
United Airlines UA1640
16:40
Phoenix Sky Harbor (PHX) 3

17:42
San Francisco (SFO) 3
Effective 2025-12-02 through 2025-12-17
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:02, non-stop
Boeing 737-800 (738)
United Airlines UA1640
16:40
Phoenix Sky Harbor (PHX) 3

17:42
San Francisco (SFO) 3
Effective 2026-01-06 through 2026-02-11
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:02, non-stop
Boeing 737-800 (738)
United Airlines UA1640
20:44
Fairbanks (FAI)

05:51(+1)
Chicago O'Hare (ORD) 1
Operates only on 2025-05-21
Mon
-
Tue
-
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 6:07, non-stop
Boeing 737 MAX 8 (7M8)
The flight arrives 1 day after departure.
United Airlines UA1640
20:50
Fairbanks (FAI)

05:54(+1)
Chicago O'Hare (ORD) 1
Effective 2025-06-01 through 2025-06-25
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 6:04, non-stop
Boeing 737 MAX 8 (7M8)
The flight arrives 1 day after departure.
United Airlines UA1640
20:53
Fairbanks (FAI)

05:57(+1)
Chicago O'Hare (ORD) 1
Effective 2025-06-26 through 2025-08-18
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 6:04, non-stop
Boeing 737 MAX 8 (7M8)
The flight arrives 1 day after departure.
United Airlines UA1640
20:59
Fairbanks (FAI)

05:57(+1)
Chicago O'Hare (ORD) 1
Effective 2025-08-19 through 2025-09-06
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:58, non-stop
Boeing 737 MAX 8 (7M8)
The flight arrives 1 day after departure.
United Airlines UA1640
21:10
Fairbanks (FAI)

06:14(+1)
Chicago O'Hare (ORD) 1
Effective 2025-05-22 through 2025-05-31
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 6:04, non-stop
Boeing 737 MAX 8 (7M8)
The flight arrives 1 day after departure.
United Airlines UA1640
22:34
Anchorage (ANC) S

08:27(+1)
George Bush, Houston (IAH) C
Effective 2025-09-07 through 2025-09-24
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 6:53, non-stop
Boeing 737 MAX 8 (7M8)
The flight arrives 1 day after departure.
Non-Direct Flights:
United Airlines UA1640
11:10
Chicago O'Hare (ORD) 1

17:49
San Francisco (SFO) 3
Effective 2025-11-02 through 2025-12-01
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 8:39, 1-stop
Boeing 737-900 (739)
United Airlines UA1640
11:10
Chicago O'Hare (ORD) 1

17:42
San Francisco (SFO) 3
Effective 2025-12-02 through 2025-12-17
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 8:32, 1-stop
Boeing 737-900 (739)
United Airlines UA1640
11:10
Chicago O'Hare (ORD) 1

17:44
San Francisco (SFO) 3
Effective 2025-12-18 through 2026-01-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 8:34, 1-stop
Boeing 737-900 (739)
United Airlines UA1640
11:10
Chicago O'Hare (ORD) 1

17:42
San Francisco (SFO) 3
Effective 2026-01-06 through 2026-02-11
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 8:32, 1-stop
Boeing 737-900 (739)
United Airlines UA1640
11:15
Chicago O'Hare (ORD) 1

17:46
San Francisco (SFO) 3
Effective from 2026-02-12
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 8:31, 1-stop
Boeing 737-900 (739)
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This flight number is listed as serving the following routes:
  • Anchorage (ANC) - George Bush, Houston (IAH)
  • Chicago O'Hare (ORD) - Phoenix Sky Harbor (PHX)
  • Chicago O'Hare (ORD) - San Francisco (SFO)
  • Fairbanks (FAI) - Chicago O'Hare (ORD)
  • Phoenix Sky Harbor (PHX) - San Francisco (SFO)
All United Airlines flights
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