United Airlines flight UA 1603: Multiple routes

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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Daily 17:43 Saint Louis (STL) 1 20:03 San Francisco (SFO) 3
UA 1603 Non-stop Boeing 737 MAX 8 (7M8) 4:20 Effective 2025-09-25 through 2025-10-25
Daily 17:45 Saint Louis (STL) 1 20:05 San Francisco (SFO) 3
UA 1603 Non-stop Airbus A319 (319) 4:20 Effective 2025-08-19 through 2025-09-24
Mon-Fri,Sun 18:39 Ontario, Los Angeles (ONT) 2 20:06 San Francisco (SFO) 3
UA 1603 Non-stop Airbus A320 (320) 1:27 Effective 2025-06-26 through 2025-07-03
Mon-Fri,Sun 18:39 Ontario, Los Angeles (ONT) 2 20:06 San Francisco (SFO) 3
UA 1603 Non-stop Airbus A320 (320) 1:27 Effective 2025-07-06 through 2025-07-31
Daily 19:00 Saint Louis (STL) 1 21:35 San Francisco (SFO) 3
UA 1603 Non-stop Airbus A319 (319) 4:35 Effective 2025-10-26 through 2025-12-01
Daily 20:55 San Francisco (SFO) 3 23:09 Seattle-Tacoma (SEA)
UA 1603 Non-stop Boeing 737 MAX 8 (7M8) 2:14 Effective 2025-08-19 through 2025-09-01
Tue-Sun 21:30 San Francisco (SFO) 3 04:51 Indianapolis (IND)
UA 1603 Non-stop Boeing 737-800 (738) 4:21 Effective 2025-05-22 through 2025-06-29
The flight arrives 1 day after departure.
Mon 21:30 San Francisco (SFO) 3 04:51 Indianapolis (IND)
UA 1603 Non-stop Boeing 737 MAX 8 (7M8) 4:21 Effective 2025-05-26 through 2025-06-23
The flight arrives 1 day after departure.
Daily 21:30 San Francisco (SFO) 3 04:51 Indianapolis (IND)
UA 1603 Non-stop Boeing 737-800 (738) 4:21 Effective 2025-06-30 through 2025-08-18
The flight arrives 1 day after departure.
Mon,Wed-Fri,Sun 22:50 San Francisco (SFO) 3 06:16 Indianapolis (IND)
UA 1603 Non-stop Boeing 737 MAX 8 (7M8) 4:26 Valid until 2025-05-21
The flight arrives 1 day after departure.
Mon-Fri,Sun 23:15 San Francisco (SFO) 3 06:30 Indianapolis (IND)
UA 1603 Non-stop Airbus A319 (319) 4:15 Effective 2025-10-26 through 2025-11-07
The flight arrives 1 day after departure.
Sat 23:15 San Francisco (SFO) 3 05:30 Indianapolis (IND)
UA 1603 Non-stop Airbus A319 (319) 4:15 Operates only on 2025-11-01
The flight arrives 1 day after departure.
Daily 23:15 San Francisco (SFO) 3 06:30 Indianapolis (IND)
UA 1603 Non-stop Airbus A319 (319) 4:15 Effective from 2025-11-08
The flight arrives 1 day after departure.
Daily 23:20 San Francisco (SFO) 3 06:44 Indianapolis (IND)
UA 1603 Non-stop Boeing 737 MAX 8 (7M8) 4:24 Effective 2025-09-25 through 2025-10-25
The flight arrives 1 day after departure.
Non-Direct Flights:
Daily 17:43 Saint Louis (STL) 1 06:44 Indianapolis (IND)
UA 1603 1-stop Boeing 737 MAX 8 (7M8) 12:01 Effective 2025-09-25 through 2025-10-25
The flight arrives 1 day after departure.
Daily 17:45 Saint Louis (STL) 1 23:09 Seattle-Tacoma (SEA)
UA 1603 1-stop Airbus A319 (319) 7:24 Effective 2025-08-19 through 2025-09-01
Mon-Fri,Sun 18:39 Ontario, Los Angeles (ONT) 2 04:51 Indianapolis (IND)
UA 1603 1-stop Airbus A320 (320) 7:12 Effective 2025-06-26 through 2025-07-03
The flight arrives 1 day after departure.
Mon-Fri,Sun 18:39 Ontario, Los Angeles (ONT) 2 04:51 Indianapolis (IND)
UA 1603 1-stop Airbus A320 (320) 7:12 Effective 2025-07-06 through 2025-07-31
The flight arrives 1 day after departure.
Mon-Fri,Sun 19:00 Saint Louis (STL) 1 06:30 Indianapolis (IND)
UA 1603 1-stop Airbus A319 (319) 10:30 Effective 2025-10-26 through 2025-11-07
The flight arrives 1 day after departure.
Sat 19:00 Saint Louis (STL) 1 05:30 Indianapolis (IND)
UA 1603 1-stop Airbus A319 (319) 10:30 Operates only on 2025-11-01
The flight arrives 1 day after departure.
Daily 19:00 Saint Louis (STL) 1 06:30 Indianapolis (IND)
UA 1603 1-stop Airbus A319 (319) 10:30 Effective 2025-11-08 through 2025-12-01
The flight arrives 1 day after departure.
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This flight number is listed as serving the following routes:


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United Airlines flight UA 1603: Multiple routes
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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
United Airlines UA1603
17:43
Saint Louis (STL) 1

20:03
San Francisco (SFO) 3
Effective 2025-09-25 through 2025-10-25
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 4:20, non-stop
Boeing 737 MAX 8 (7M8)
United Airlines UA1603
17:45
Saint Louis (STL) 1

20:05
San Francisco (SFO) 3
Effective 2025-08-19 through 2025-09-24
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 4:20, non-stop
Airbus A319 (319)
United Airlines UA1603
18:39
Ontario, Los Angeles (ONT) 2

20:06
San Francisco (SFO) 3
Effective 2025-06-26 through 2025-07-03
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 1:27, non-stop
Airbus A320 (320)
United Airlines UA1603
18:39
Ontario, Los Angeles (ONT) 2

20:06
San Francisco (SFO) 3
Effective 2025-07-06 through 2025-07-31
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 1:27, non-stop
Airbus A320 (320)
United Airlines UA1603
19:00
Saint Louis (STL) 1

21:35
San Francisco (SFO) 3
Effective 2025-10-26 through 2025-12-01
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 4:35, non-stop
Airbus A319 (319)
United Airlines UA1603
20:55
San Francisco (SFO) 3

23:09
Seattle-Tacoma (SEA)
Effective 2025-08-19 through 2025-09-01
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:14, non-stop
Boeing 737 MAX 8 (7M8)
United Airlines UA1603
21:30
San Francisco (SFO) 3

04:51(+1)
Indianapolis (IND)
Effective 2025-05-22 through 2025-06-29
Mon
-
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 4:21, non-stop
Boeing 737-800 (738)
The flight arrives 1 day after departure.
United Airlines UA1603
21:30
San Francisco (SFO) 3

04:51(+1)
Indianapolis (IND)
Effective 2025-05-26 through 2025-06-23
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 4:21, non-stop
Boeing 737 MAX 8 (7M8)
The flight arrives 1 day after departure.
United Airlines UA1603
21:30
San Francisco (SFO) 3

04:51(+1)
Indianapolis (IND)
Effective 2025-06-30 through 2025-08-18
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 4:21, non-stop
Boeing 737-800 (738)
The flight arrives 1 day after departure.
United Airlines UA1603
22:50
San Francisco (SFO) 3

06:16(+1)
Indianapolis (IND)
Valid until 2025-05-21
Mon
Tue
-
Wed
Thu
Fri
Sat
-
Sun
Duration: 4:26, non-stop
Boeing 737 MAX 8 (7M8)
The flight arrives 1 day after departure.
United Airlines UA1603
23:15
San Francisco (SFO) 3

06:30(+1)
Indianapolis (IND)
Effective 2025-10-26 through 2025-11-07
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 4:15, non-stop
Airbus A319 (319)
The flight arrives 1 day after departure.
United Airlines UA1603
23:15
San Francisco (SFO) 3

05:30(+1)
Indianapolis (IND)
Operates only on 2025-11-01
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 4:15, non-stop
Airbus A319 (319)
The flight arrives 1 day after departure.
United Airlines UA1603
23:15
San Francisco (SFO) 3

06:30(+1)
Indianapolis (IND)
Effective from 2025-11-08
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 4:15, non-stop
Airbus A319 (319)
The flight arrives 1 day after departure.
United Airlines UA1603
23:20
San Francisco (SFO) 3

06:44(+1)
Indianapolis (IND)
Effective 2025-09-25 through 2025-10-25
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 4:24, non-stop
Boeing 737 MAX 8 (7M8)
The flight arrives 1 day after departure.
Non-Direct Flights:
United Airlines UA1603
17:43
Saint Louis (STL) 1

06:44(+1)
Indianapolis (IND)
Effective 2025-09-25 through 2025-10-25
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 12:01, 1-stop
Boeing 737 MAX 8 (7M8)
The flight arrives 1 day after departure.
United Airlines UA1603
17:45
Saint Louis (STL) 1

23:09
Seattle-Tacoma (SEA)
Effective 2025-08-19 through 2025-09-01
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 7:24, 1-stop
Airbus A319 (319)
United Airlines UA1603
18:39
Ontario, Los Angeles (ONT) 2

04:51(+1)
Indianapolis (IND)
Effective 2025-06-26 through 2025-07-03
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 7:12, 1-stop
Airbus A320 (320)
The flight arrives 1 day after departure.
United Airlines UA1603
18:39
Ontario, Los Angeles (ONT) 2

04:51(+1)
Indianapolis (IND)
Effective 2025-07-06 through 2025-07-31
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 7:12, 1-stop
Airbus A320 (320)
The flight arrives 1 day after departure.
United Airlines UA1603
19:00
Saint Louis (STL) 1

06:30(+1)
Indianapolis (IND)
Effective 2025-10-26 through 2025-11-07
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 10:30, 1-stop
Airbus A319 (319)
The flight arrives 1 day after departure.
United Airlines UA1603
19:00
Saint Louis (STL) 1

05:30(+1)
Indianapolis (IND)
Operates only on 2025-11-01
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 10:30, 1-stop
Airbus A319 (319)
The flight arrives 1 day after departure.
United Airlines UA1603
19:00
Saint Louis (STL) 1

06:30(+1)
Indianapolis (IND)
Effective 2025-11-08 through 2025-12-01
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 10:30, 1-stop
Airbus A319 (319)
The flight arrives 1 day after departure.
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This flight number is listed as serving the following routes:
  • Ontario, Los Angeles (ONT) - Indianapolis (IND)
  • Ontario, Los Angeles (ONT) - San Francisco (SFO)
  • Saint Louis (STL) - Indianapolis (IND)
  • Saint Louis (STL) - San Francisco (SFO)
  • Saint Louis (STL) - Seattle-Tacoma (SEA)
  • San Francisco (SFO) - Indianapolis (IND)
  • San Francisco (SFO) - Seattle-Tacoma (SEA)
All United Airlines flights
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