Airlines with flights from Seattle to Denver

There are five airlines with scheduled flights between SEA and DEN. United, Alaska Airlines and 3 more carriers has non-stop flights from Seattle Airport to Denver International and the flight time is 2 hours and 49 minutes.

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Schedules

United Airlines

Non-stop with United Airlines

  • Total flight time: 2 hours and 49 minutes
  • Denver is a United Airlines hub.
  • 50 flights per week
  • Airbus A321neo
    Airbus A320
    Boeing 737-800 Passenger
    Boeing 737MAX 9 Passenger
    Boeing 737MAX 8 Passenger
    Boeing 737-900 Passenger
  • Business and first class available
SEA
Direct
DEN
 
Flight
Mon
Jun 1
Tue
Jun 2
Wed
Jun 3
Thu
Jun 4
Fri
Jun 5
Sat
Jun 6
Sun
Jun 7
UA1915
05:07
05:07
05:07
05:07
05:07
05:07
05:07
UA1505
08:56
08:56
08:58
08:56
08:56
08:56
08:56
UA1715
11:02
11:02
11:02
11:02
11:02
11:02
11:02
UA1351
12:50
12:50
12:50
12:50
12:50
12:50
12:50
UA655
14:36
14:36
14:36
14:36
14:36
----
14:36
UA757
15:40
15:40
15:40
15:40
15:40
15:40
15:41
UA1218
19:54
----
19:54
19:54
20:05
----
19:54
SHOW RETURN SCHEDULE
CHECK PRICES FOR SEA - DEN

The timetable & schedule information was updated at 2026-04-22

Alaska Airlines

Non-stop with Alaska Airlines

  • Total flight time: 2 hours and 50 minutes
  • One World Alliance
  • Seattle is a Alaska Airlines hub (Primary hub).
  • 35 flights per week
  • Boeing 737-900 (winglets) Passenger/BBJ3
    Boeing 737MAX 9 Passenger
    Boeing 737-800 (winglets) Passenger/BBJ2
    Boeing 737MAX 8 Passenger
  • Business and first class available
SEA
Direct
DEN
 
Flight
Mon
Jun 1
Tue
Jun 2
Wed
Jun 3
Thu
Jun 4
Fri
Jun 5
Sat
Jun 6
Sun
Jun 7
AS682
07:30
07:30
07:30
07:30
07:30
07:30
07:30
AS1332
10:04
10:04
10:04
10:04
10:04
10:04
10:04
AS786
13:13
13:13
13:13
13:13
13:13
13:13
13:13
AS602
17:59
17:59
17:59
17:59
17:59
17:59
17:59
AS642
20:07
20:07
20:07
20:07
20:07
20:07
20:07
SHOW RETURN SCHEDULE
CHECK PRICES FOR SEA - DEN

The timetable & schedule information was updated at 2026-04-22

Southwest Airlines

Non-stop with Southwest Airlines

  • Total flight time: 2 hours and 35 minutes
  • Low-cost airline
  • Denver is a Southwest Airlines focus city (Operating base).
  • 22 flights per week
  • Boeing 737-800 (winglets) Passenger/BBJ2
    Boeing 737-700 Passenger (Scimitar Winglets)
    Boeing 737MAX 8 Passenger
SEA
Direct
DEN
 
Flight
Mon
Jun 1
Tue
Jun 2
Wed
Jun 3
Thu
Jun 4
Fri
Jun 5
Sat
Jun 6
Sun
Jun 7
WN3615
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05:15
05:15
05:00
05:30
WN1310
05:30
06:30
06:30
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WN3397
----
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07:50
07:50
09:45
08:45
WN4194
08:00
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WN4195
13:55
09:20
09:20
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WN3616
----
----
----
12:20
12:20
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WN376
----
13:25
13:25
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----
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WN3617
----
----
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14:35
14:35
13:30
17:05
WN1166
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14:25
WN4845
----
----
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19:25
19:20
19:35
20:05
SHOW RETURN SCHEDULE
CHECK PRICES FOR SEA - DEN

The timetable & schedule information was updated at 2026-04-22

Delta Air Lines

Non-stop with Delta Air Lines

  • Total flight time: 2 hours and 50 minutes
  • Sky Team Alliance
  • Seattle is a Delta Air Lines hub.
  • 21 flights per week
  • Airbus A220-300
  • Business and first class available
SEA
Direct
DEN
 
Flight
Mon
Jun 1
Tue
Jun 2
Wed
Jun 3
Thu
Jun 4
Fri
Jun 5
Sat
Jun 6
Sun
Jun 7
DL1358
07:55
07:55
07:55
07:55
07:55
07:55
08:30
DL2759
13:40
13:40
13:40
13:40
13:40
13:40
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DL2543
----
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13:50
DL2851
19:59
19:59
19:59
19:59
19:59
19:59
19:56
SHOW RETURN SCHEDULE
CHECK PRICES FOR SEA - DEN

The timetable & schedule information was updated at 2026-04-22

Frontier Airlines

Non-stop with Frontier Airlines

  • Total flight time: 2 hours and 53 minutes
  • Low-cost airline
  • Denver is a Frontier Airlines focus city (Operating base).
  • 11 flights per week
  • Airbus A321
    Airbus A321neo
SEA
Direct
DEN
 
Flight
Mon
Jun 1
Tue
Jun 2
Wed
Jun 3
Thu
Jun 4
Fri
Jun 5
Sat
Jun 6
Sun
Jun 7
F93406
15:19
----
----
15:19
15:19
----
15:19
F91176
19:50
19:50
19:50
19:50
19:50
19:50
19:50
SHOW RETURN SCHEDULE
CHECK PRICES FOR SEA - DEN

The timetable & schedule information was updated at 2026-04-22

Alaska Airlines

Via Portland with Alaska Airlines

  • Total flight time: 4h 15m - 6h 18m.
  • One World Alliance
  • Seattle is a Alaska Airlines hub (Primary hub).
  • 68 flights per week
  • Boeing 737-900 (winglets) Passenger/BBJ3
    Boeing 737MAX 9 Passenger
    Boeing 737-800 (winglets) Passenger/BBJ2
    Boeing 737MAX 8 Passenger
SEA
 
Via PDX
 
DEN
 
Flight
Mon
Jun 1
Tue
Jun 2
Wed
Jun 3
Thu
Jun 4
Fri
Jun 5
Sat
Jun 6
Sun
Jun 7
AS2354
AS1346
13:00
13:00
13:00
13:00
13:00
13:00
13:00
AS1384
AS711
15:55
15:50
15:50
15:50
15:50
15:50
15:50
SHOW RETURN SCHEDULE
CHECK PRICES FOR SEA - DEN

The timetable & schedule information was updated at 2026-04-22

Delta Air Lines

Via Salt Lake City with Delta Air Lines

  • Total flight time: 4h 29m - 6h 43m.
  • Sky Team Alliance
  • Seattle is a Delta Air Lines hub.
  • 99 flights per week
  • Airbus A220-300
SEA
 
Via SLC
 
DEN
 
Flight
Mon
Jun 1
Tue
Jun 2
Wed
Jun 3
Thu
Jun 4
Fri
Jun 5
Sat
Jun 6
Sun
Jun 7
DL1128
DL1553
05:30
05:30
05:30
05:30
05:30
05:30
05:30
DL2858
DL1623
07:15
07:15
07:15
07:15
07:15
07:15
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DL1016
DL1623
09:25
09:25
09:25
09:25
09:25
09:25
09:26
DL1120
DL1586
13:25
13:25
13:25
13:25
13:25
13:25
13:30
SHOW RETURN SCHEDULE
CHECK PRICES FOR SEA - DEN

The timetable & schedule information was updated at 2026-04-22

Frontier Airlines

Via Salt Lake City with Frontier Airlines

  • Total flight time: 4h 34m - 4h 41m.
  • Low-cost airline
  • Denver is a Frontier Airlines focus city (Operating base).
  • 12 flights per week
  • Airbus A321
    Airbus A321neo
SEA
 
Via SLC
 
DEN
 
Flight
Mon
Jun 1
Tue
Jun 2
Wed
Jun 3
Thu
Jun 4
Fri
Jun 5
Sat
Jun 6
Sun
Jun 7
SHOW RETURN SCHEDULE
CHECK PRICES FOR SEA - DEN

The timetable & schedule information was updated at 2026-04-22

Southwest Airlines

Via Sacramento with Southwest Airlines

  • Total flight time: 4h 40m - 9h 10m.
  • Low-cost airline
  • Denver is a Southwest Airlines focus city (Operating base).
  • 84 flights per week
  • Boeing 737-800 (winglets) Passenger/BBJ2
    Boeing 737-700 Passenger (Scimitar Winglets)
    Boeing 737MAX 8 Passenger
SEA
 
Via SMF
 
DEN
 
Flight
Mon
Jun 1
Tue
Jun 2
Wed
Jun 3
Thu
Jun 4
Fri
Jun 5
Sat
Jun 6
Sun
Jun 7
WN3629
WN3548
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05:00
WN2862
WN4329
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05:30
05:30
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WN3630
WN3774
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07:35
07:35
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WN3630
WN3775
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09:10
WN3212
WN4105
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11:10
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WN4204
WN1354
11:40
11:35
11:35
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WN3231
WN3474
----
----
----
----
----
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15:30
SHOW RETURN SCHEDULE
CHECK PRICES FOR SEA - DEN

The timetable & schedule information was updated at 2026-04-22

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Flight data on this page was last updated on 2026-05-18
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