United Airlines flights from Seattle-Tacoma (SEA) to Denver (DEN).
| FLIGHT SCHEDULE |
|---|
| Direct Flights: |
| Tue
05:00
Seattle-Tacoma (SEA)
08:48
Denver (DEN) United Airlines UA 397 Non-stop Boeing 737-800 (738) 2:48 Operates only on 2026-01-06 |
| Daily
05:00
Seattle-Tacoma (SEA)
08:48
Denver (DEN) United Airlines UA 397 Non-stop Boeing 737 MAX 9 (7M9) 2:48 Effective 2026-01-07 through 2026-02-03 |
| Mon-Sat
05:00
Seattle-Tacoma (SEA)
08:48
Denver (DEN) United Airlines UA 397 Non-stop Boeing 737 MAX 9 (7M9) 2:48 Effective 2026-02-05 through 2026-02-11 |
| Sun
05:00
Seattle-Tacoma (SEA)
08:48
Denver (DEN) United Airlines UA 397 Non-stop Boeing 737-900 (739) 2:48 Operates only on 2026-02-08 |
| Fri
14:49
Seattle-Tacoma (SEA)
18:32
Denver (DEN) United Airlines UA 399 Non-stop Boeing 737-800 (738) 2:43 Operates only on 2026-02-13 |
| Wed,Sun
14:55
Seattle-Tacoma (SEA)
18:38
Denver (DEN) United Airlines UA 399 Non-stop Boeing 737-900 (739) 2:43 Effective 2026-02-15 through 2026-03-04 |
| Thu
15:16
Seattle-Tacoma (SEA)
18:59
Denver (DEN) United Airlines UA 399 Non-stop Boeing 737-900 (739) 2:43 Effective 2026-02-12 through 2026-02-19 |
| Mon
15:16
Seattle-Tacoma (SEA)
18:59
Denver (DEN) United Airlines UA 399 Non-stop Boeing 737 MAX 9 (7M9) 2:43 Operates only on 2026-02-16 |
| Mon,Tue
15:16
Seattle-Tacoma (SEA)
18:59
Denver (DEN) United Airlines UA 399 Non-stop Boeing 737-800 (738) 2:43 Effective 2026-02-17 through 2026-03-03 |
| Thu,Fri
15:16
Seattle-Tacoma (SEA)
18:59
Denver (DEN) United Airlines UA 399 Non-stop Boeing 737-900 (739) 2:43 Effective 2026-02-20 through 2026-02-27 |
| Sat
15:25
Seattle-Tacoma (SEA)
19:12
Denver (DEN) United Airlines UA 399 Non-stop Airbus A320 (320) 2:47 Effective 2026-02-14 through 2026-02-28 |
| Daily
14:30
Seattle-Tacoma (SEA)
18:14
Denver (DEN) United Airlines UA 663 Non-stop Boeing 737 MAX 9 (7M9) 2:44 Effective 2026-05-21 through 2026-08-17 |
| Daily
12:55
Seattle-Tacoma (SEA)
16:41
Denver (DEN) United Airlines UA 757 Non-stop Boeing 737 MAX 9 (7M9) 2:46 Effective 2026-02-12 through 2026-03-04 |
| Mon-Fri
12:55
Seattle-Tacoma (SEA)
16:42
Denver (DEN) United Airlines UA 757 Non-stop Boeing 737-800 (738) 2:47 Effective 2026-03-05 through 2026-03-27 |
| Sat
12:55
Seattle-Tacoma (SEA)
16:42
Denver (DEN) United Airlines UA 757 Non-stop Boeing 737-900 (739) 2:47 Effective 2026-03-07 through 2026-03-28 |
| Sun
12:55
Seattle-Tacoma (SEA)
16:42
Denver (DEN) United Airlines UA 757 Non-stop Boeing 737 MAX 9 (7M9) 2:47 Effective 2026-03-08 through 2026-03-22 |
| Mon-Fri,Sun
15:30
Seattle-Tacoma (SEA)
19:16
Denver (DEN) United Airlines UA 757 Non-stop Boeing 737-900 (739) 2:46 Effective 2026-01-06 through 2026-02-06 |
| Sat
15:30
Seattle-Tacoma (SEA)
19:16
Denver (DEN) United Airlines UA 757 Non-stop Boeing 737-800 (738) 2:46 Effective 2026-01-10 through 2026-01-31 |
| Mon-Wed,Sat,Sun
15:30
Seattle-Tacoma (SEA)
19:16
Denver (DEN) United Airlines UA 757 Non-stop Boeing 737-900 (739) 2:46 Effective 2026-02-07 through 2026-02-11 |
| Daily
15:44
Seattle-Tacoma (SEA)
19:34
Denver (DEN) United Airlines UA 757 Non-stop Boeing 737 MAX 9 (7M9) 2:50 Effective 2026-03-29 through 2026-04-29 |
| Mon-Thu
15:50
Seattle-Tacoma (SEA)
19:37
Denver (DEN) United Airlines UA 757 Non-stop Airbus A320 (320) 2:47 Valid until 2026-01-05 |
| Fri-Sun
15:50
Seattle-Tacoma (SEA)
19:37
Denver (DEN) United Airlines UA 757 Non-stop Airbus A319 (319) 2:47 Valid until 2026-01-04 |
| Daily
15:51
Seattle-Tacoma (SEA)
19:35
Denver (DEN) United Airlines UA 757 Non-stop Boeing 737-800 (738) 2:44 Effective from 2026-04-30 |
| Daily
19:02
Seattle-Tacoma (SEA)
22:53
Denver (DEN) United Airlines UA 1218 Non-stop Airbus A320 (320) 2:51 Effective 2026-03-29 through 2026-04-29 |
| Daily
19:05
Seattle-Tacoma (SEA)
22:56
Denver (DEN) United Airlines UA 1218 Non-stop Boeing 737-800 (738) 2:51 Effective 2026-04-30 through 2026-05-20 |
| Mon,Wed-Fri,Sun
19:10
Seattle-Tacoma (SEA)
22:49
Denver (DEN) United Airlines UA 1218 Non-stop Boeing 737 MAX 9 (7M9) 2:39 Effective 2026-02-12 through 2026-02-22 |
| Wed-Fri,Sun
19:10
Seattle-Tacoma (SEA)
22:49
Denver (DEN) United Airlines UA 1218 Non-stop Boeing 737 MAX 9 (7M9) 2:39 Effective 2026-02-25 through 2026-03-05 |
| Fri
19:10
Seattle-Tacoma (SEA)
22:50
Denver (DEN) United Airlines UA 1218 Non-stop Airbus A320 (320) 2:40 Effective 2026-03-06 through 2026-03-27 |
| Wed,Thu,Sun
19:10
Seattle-Tacoma (SEA)
22:49
Denver (DEN) United Airlines UA 1218 Non-stop Boeing 737 MAX 9 (7M9) 2:39 Effective 2026-03-08 through 2026-03-26 |
| Daily
19:10
Seattle-Tacoma (SEA)
22:55
Denver (DEN) United Airlines UA 1218 Non-stop Airbus A320 (320) 2:45 Effective from 2026-05-21 |
| Mon,Tue,Thu-Sun
13:55
Seattle-Tacoma (SEA)
17:41
Denver (DEN) United Airlines UA 1263 Non-stop Boeing 737-800 (738) 2:46 Valid until 2026-01-05 |
| Daily
12:46
Seattle-Tacoma (SEA)
16:30
Denver (DEN) United Airlines UA 1351 Non-stop Boeing 737 MAX 9 (7M9) 2:44 Effective from 2026-05-21 |
| Daily
12:51
Seattle-Tacoma (SEA)
16:42
Denver (DEN) United Airlines UA 1351 Non-stop Airbus A321neo (32Q) 2:51 Effective 2026-04-30 through 2026-05-20 |
| Daily
12:55
Seattle-Tacoma (SEA)
16:45
Denver (DEN) United Airlines UA 1351 Non-stop Boeing 737 MAX 9 (7M9) 2:50 Effective 2026-03-29 through 2026-04-29 |
| Sat
12:30
Seattle-Tacoma (SEA)
16:16
Denver (DEN) United Airlines UA 1374 Non-stop Boeing 737-900 (739) 2:46 Valid until 2026-01-03 |
| Thu,Sun
12:37
Seattle-Tacoma (SEA)
16:24
Denver (DEN) United Airlines UA 1374 Non-stop Airbus A319 (319) 2:47 Valid until 2026-01-04 |
| Mon-Wed,Fri
12:44
Seattle-Tacoma (SEA)
16:30
Denver (DEN) United Airlines UA 1374 Non-stop Boeing 737-900 (739) 2:46 Valid until 2026-01-02 |
| Mon
12:44
Seattle-Tacoma (SEA)
16:30
Denver (DEN) United Airlines UA 1374 Non-stop Boeing 737 MAX 8 (7M8) 2:46 Operates only on 2026-01-05 |
| Mon-Thu,Sun
05:02
Seattle-Tacoma (SEA)
08:51
Denver (DEN) United Airlines UA 1479 Non-stop Airbus A320 (320) 2:49 Valid until 2026-01-04 |
| Fri,Sat
05:02
Seattle-Tacoma (SEA)
08:51
Denver (DEN) United Airlines UA 1479 Non-stop Airbus A319 (319) 2:49 Effective 2026-01-02 through 2026-01-03 |
| Mon
05:02
Seattle-Tacoma (SEA)
08:51
Denver (DEN) United Airlines UA 1479 Non-stop Boeing 737-800 (738) 2:49 Operates only on 2026-01-05 |
| Daily
08:30
Seattle-Tacoma (SEA)
12:11
Denver (DEN) United Airlines UA 1505 Non-stop Boeing 737 MAX 9 (7M9) 2:41 Effective from 2026-05-21 |
| Daily
08:40
Seattle-Tacoma (SEA)
12:32
Denver (DEN) United Airlines UA 1505 Non-stop Airbus A320 (320) 2:52 Effective 2026-01-06 through 2026-02-11 |
| Daily
08:55
Seattle-Tacoma (SEA)
12:45
Denver (DEN) United Airlines UA 1505 Non-stop Boeing 737-800 (738) 2:50 Effective 2026-03-29 through 2026-04-29 |
| Daily
08:56
Seattle-Tacoma (SEA)
12:45
Denver (DEN) United Airlines UA 1505 Non-stop Boeing 737-800 (738) 2:49 Effective 2026-04-30 through 2026-05-20 |
| Daily
08:57
Seattle-Tacoma (SEA)
12:44
Denver (DEN) United Airlines UA 1505 Non-stop Airbus A319 (319) 2:47 Valid until 2026-01-05 |
| Daily
08:59
Seattle-Tacoma (SEA)
12:44
Denver (DEN) United Airlines UA 1505 Non-stop Boeing 737-800 (738) 2:45 Effective 2026-03-05 through 2026-03-28 |
| Daily
09:00
Seattle-Tacoma (SEA)
12:45
Denver (DEN) United Airlines UA 1505 Non-stop Boeing 737-800 (738) 2:45 Effective 2026-02-12 through 2026-03-04 |
| Daily
11:11
Seattle-Tacoma (SEA)
14:52
Denver (DEN) United Airlines UA 2031 Non-stop Boeing 737 MAX 9 (7M9) 2:41 Effective 2026-05-21 through 2026-10-24 |
| Tue
12:25
Seattle-Tacoma (SEA)
16:11
Denver (DEN) United Airlines UA 2258 Non-stop Boeing 737-900 (739) 2:46 Operates only on 2026-01-06 |
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- A domestic route departing from the Seattle-Tacoma airport (SEA) and arriving at Denver airport (DEN).
- The flight distance is 1022 miles, or 1644 km.
- The timezone of the departure airport is UTC-8 , and the timezone of the arrival airport is UTC-7 . Current time at the point of departure is (loading...), and (loading...) at the point of arrival. There is a (loading...) hour time difference between the airports.
- For direct flights, the flight time varies between 2:38 and 2:52.
