United Airlines flight UA 644: Multiple routes

Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Mon,Thu,Fri,Sun 06:35 San Francisco (SFO) 3 10:18 Denver (DEN)
UA 644 Non-stop Boeing 737-900 (739) 2:43 Valid until 2024-09-23
Tue,Wed 06:35 San Francisco (SFO) 3 10:18 Denver (DEN)
UA 644 Non-stop Boeing 737 MAX 9 (7M9) 2:43 Valid until 2024-09-11
Sat 06:35 San Francisco (SFO) 3 10:18 Denver (DEN)
UA 644 Non-stop Boeing 737-800 (738) 2:43 Valid until 2024-09-07
Tue,Wed,Sat 06:35 San Francisco (SFO) 3 10:18 Denver (DEN)
UA 644 Non-stop Boeing 737 MAX 9 (7M9) 2:43 Effective 2024-09-14 through 2024-09-25
Fri 11:15 Denver (DEN) 12:57 Portland (PDX)
UA 644 Non-stop Boeing 737-900 (739) 2:42 Operates only on 2024-10-11
Daily 11:21 Denver (DEN) 13:15 Portland (PDX)
UA 644 Non-stop Boeing 737 MAX 9 (7M9) 2:54 Effective from 2025-02-13
Sun 11:30 Denver (DEN) 13:12 Portland (PDX)
UA 644 Non-stop Boeing 737-800 (738) 2:42 Operates only on 2024-10-13
Mon-Fri,Sun 11:35 Denver (DEN) 13:17 Portland (PDX)
UA 644 Non-stop Boeing 737-900 (739) 2:42 Effective 2024-09-26 through 2024-10-10
Sat 11:35 Denver (DEN) 13:17 Portland (PDX)
UA 644 Non-stop Boeing 737 MAX 8 (7M8) 2:42 Effective 2024-09-28 through 2024-10-26
Mon-Fri,Sun 11:35 Denver (DEN) 13:17 Portland (PDX)
UA 644 Non-stop Boeing 737-900 (739) 2:42 Effective 2024-10-14 through 2024-10-25
Daily 11:45 Denver (DEN) 13:40 Portland (PDX)
UA 644 Non-stop Boeing 737-800 (738) 2:55 Effective 2024-12-19 through 2025-01-06
Daily 11:55 Denver (DEN) 13:49 Portland (PDX)
UA 644 Non-stop Boeing 737-900 (739) 2:54 Effective 2024-12-03 through 2024-12-18
Daily 11:55 Denver (DEN) 13:49 Portland (PDX)
UA 644 Non-stop Boeing 737-900 (739) 2:54 Effective 2025-01-07 through 2025-02-12
Mon-Fri,Sun 15:20 Portland (PDX) 17:09 San Francisco (SFO) 3
UA 644 Non-stop Boeing 737-800 (738) 1:49 Effective 2024-12-03 through 2024-12-18
Daily 15:41 Portland (PDX) 17:23 San Francisco (SFO) 3
UA 644 Non-stop Boeing 737-800 (738) 1:42 Effective from 2025-02-13
Daily 16:16 Portland (PDX) 18:05 San Francisco (SFO) 3
UA 644 Non-stop Boeing 737 MAX 8 (7M8) 1:49 Effective 2024-10-27 through 2024-11-27
Mon,Fri-Sun 16:16 Portland (PDX) 18:05 San Francisco (SFO) 3
UA 644 Non-stop Boeing 737 MAX 8 (7M8) 1:49 Effective 2024-11-29 through 2024-12-02
Sat,Sun 19:53 San Francisco (SFO) 3 21:28 San Diego (SAN) 2
UA 644 Non-stop Boeing 737-800 (738) 1:35 Effective 2024-11-30 through 2024-12-01
Daily 19:55 San Francisco (SFO) 3 21:32 San Diego (SAN) 2
UA 644 Non-stop Boeing 737-800 (738) 1:37 Effective 2024-10-27 through 2024-11-27
Mon,Fri 19:55 San Francisco (SFO) 3 21:32 San Diego (SAN) 2
UA 644 Non-stop Boeing 737-800 (738) 1:37 Effective 2024-11-29 through 2024-12-02
Sat,Sun 22:30 San Diego (SAN) 2 01:57 Denver (DEN)
UA 644 Non-stop Boeing 737-800 (738) 2:27 Effective 2024-11-30 through 2024-12-01
The flight arrives 1 day after departure.
Non-Direct Flights:
Daily 11:21 Denver (DEN) 17:23 San Francisco (SFO) 3
UA 644 1-stop Boeing 737 MAX 9 (7M9) 7:02 Effective from 2025-02-13
Mon-Fri,Sun 11:55 Denver (DEN) 17:09 San Francisco (SFO) 3
UA 644 1-stop Boeing 737-900 (739) 6:14 Effective 2024-12-03 through 2024-12-18
Daily 16:16 Portland (PDX) 21:32 San Diego (SAN) 2
UA 644 1-stop Boeing 737 MAX 8 (7M8) 5:16 Effective 2024-10-27 through 2024-11-27
Mon,Fri 16:16 Portland (PDX) 21:32 San Diego (SAN) 2
UA 644 1-stop Boeing 737 MAX 8 (7M8) 5:16 Effective 2024-11-29 through 2024-12-02
Sat,Sun 16:16 Portland (PDX) 21:28 San Diego (SAN) 2
UA 644 1-stop Boeing 737 MAX 8 (7M8) 5:12 Effective 2024-11-30 through 2024-12-01
Sat,Sun 19:53 San Francisco (SFO) 3 01:57 Denver (DEN)
UA 644 1-stop Boeing 737-800 (738) 5:04 Effective 2024-11-30 through 2024-12-01
The flight arrives 1 day after departure.
Sat,Sun 16:16 Portland (PDX) 01:57 Denver (DEN)
UA 644 2-stop Boeing 737 MAX 8 (7M8) 8:41 Effective 2024-11-30 through 2024-12-01
The flight arrives 1 day after departure.
This flight number is listed as serving the following routes:
United Airlines flight UA 644: Multiple routes
Select flight date:
FLIGHT SCHEDULE
Direct Flights:

United Airlines UA644
Valid until 2024-09-23
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 2:43, non-stop
Boeing 737-900 (739)

United Airlines UA644
Valid until 2024-09-11
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:43, non-stop
Boeing 737 MAX 9 (7M9)

United Airlines UA644
Valid until 2024-09-07
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 2:43, non-stop
Boeing 737-800 (738)

United Airlines UA644
Effective 2024-09-14 through 2024-09-25
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
Sun
-
Duration: 2:43, non-stop
Boeing 737 MAX 9 (7M9)

United Airlines UA644
Operates only on 2024-10-11
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Duration: 2:42, non-stop
Boeing 737-900 (739)

United Airlines UA644
Effective from 2025-02-13
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:54, non-stop
Boeing 737 MAX 9 (7M9)

United Airlines UA644
Operates only on 2024-10-13
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:42, non-stop
Boeing 737-800 (738)

United Airlines UA644
Effective 2024-09-26 through 2024-10-10
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 2:42, non-stop
Boeing 737-900 (739)

United Airlines UA644
Effective 2024-09-28 through 2024-10-26
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 2:42, non-stop
Boeing 737 MAX 8 (7M8)

United Airlines UA644
Effective 2024-10-14 through 2024-10-25
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 2:42, non-stop
Boeing 737-900 (739)

United Airlines UA644
Effective 2024-12-19 through 2025-01-06
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:55, non-stop
Boeing 737-800 (738)

United Airlines UA644
Effective 2024-12-03 through 2024-12-18
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:54, non-stop
Boeing 737-900 (739)

United Airlines UA644
Effective 2025-01-07 through 2025-02-12
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:54, non-stop
Boeing 737-900 (739)

United Airlines UA644
Effective 2024-12-03 through 2024-12-18
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 1:49, non-stop
Boeing 737-800 (738)

United Airlines UA644
Effective from 2025-02-13
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:42, non-stop
Boeing 737-800 (738)

United Airlines UA644
Effective 2024-10-27 through 2024-11-27
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:49, non-stop
Boeing 737 MAX 8 (7M8)

United Airlines UA644
Effective 2024-11-29 through 2024-12-02
Mon
Tue
-
Wed
-
Thu
-
Fri
Sat
Sun
Duration: 1:49, non-stop
Boeing 737 MAX 8 (7M8)

United Airlines UA644
Effective 2024-11-30 through 2024-12-01
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
Duration: 1:35, non-stop
Boeing 737-800 (738)

United Airlines UA644
Effective 2024-10-27 through 2024-11-27
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:37, non-stop
Boeing 737-800 (738)

United Airlines UA644
Effective 2024-11-29 through 2024-12-02
Mon
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Duration: 1:37, non-stop
Boeing 737-800 (738)

United Airlines UA644
22:30

01:57(+1)
Effective 2024-11-30 through 2024-12-01
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
Duration: 2:27, non-stop
Boeing 737-800 (738)
The flight arrives 1 day after departure.

Non-Direct Flights:

United Airlines UA644
Effective from 2025-02-13
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 7:02, 1-stop
Boeing 737 MAX 9 (7M9)

United Airlines UA644
Effective 2024-12-03 through 2024-12-18
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 6:14, 1-stop
Boeing 737-900 (739)

United Airlines UA644
Effective 2024-10-27 through 2024-11-27
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:16, 1-stop
Boeing 737 MAX 8 (7M8)

United Airlines UA644
Effective 2024-11-29 through 2024-12-02
Mon
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Duration: 5:16, 1-stop
Boeing 737 MAX 8 (7M8)

United Airlines UA644
Effective 2024-11-30 through 2024-12-01
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
Duration: 5:12, 1-stop
Boeing 737 MAX 8 (7M8)

United Airlines UA644
19:53

01:57(+1)
Effective 2024-11-30 through 2024-12-01
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
Duration: 5:04, 1-stop
Boeing 737-800 (738)
The flight arrives 1 day after departure.

United Airlines UA644
16:16

01:57(+1)
Effective 2024-11-30 through 2024-12-01
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
Duration: 8:41, 2-stop
Boeing 737 MAX 8 (7M8)
The flight arrives 1 day after departure.
This flight number is listed as serving the following routes:
  • Denver (DEN) - Portland (PDX)
  • Portland (PDX) - San Diego (SAN)
  • Portland (PDX) - San Francisco (SFO)
  • San Diego (SAN) - Denver (DEN)
  • San Francisco (SFO) - Denver (DEN)
  • San Francisco (SFO) - San Diego (SAN)