Seattle to Denver Flights (SEA-DEN)

🇺🇸 SEA

Seattle

1023 mi

DEN 🇺🇸

Denver

Seattle–Tacoma International Airport Denver International Airport 9 airlines

The Seattle to Denver route connects Seattle–Tacoma International Airport (SEA) in US with Denver International Airport (DEN) in US. This medium-haul flight covers approximately 1023 miles (1646 km) with a typical flight time of 2h 17m. This route is served by 9 airlines: United, Southwest, Alaska Airlines and others. AirportRoutes has tracked 28 unique flight numbers on this route.

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Departure Airport

Seattle–Tacoma International Airport

ICAO Code:: KSEA
IATA Code:: SEA
City:: 🇺🇸 Seattle
Country:: US
Elevation:: 433 ft

Destination Airport

Denver International Airport

ICAO Code:: KDEN
IATA Code:: DEN
City:: 🇺🇸 Denver
Country:: US
Elevation:: 5431 ft

Operators

Tracked Flights

1023

Miles

2h 17m

Flight Duration

Route Map

Great Circle

Map data © Mapbox © OpenStreetMap contributors

Operating Airlines

Airline	ICAO	IATA
United	`UAL`	`UA`
Southwest	`SWA`	`WN`
Alaska Airlines	`ASA`	`AS`
Delta Air Lines	`DAL`	`DL`
Frontier	`FFT`	`F9`
SkyWest	`SKW`	`OO`
Air Transport International, Inc.	`ATN`	`8C`
Atlas Air	`GTI`	`5Y`
Volaris	`VOI`	`Y4`

Flight Schedule Pattern

Day	Flights Observed	Frequency
Monday	39	14%
Tuesday	29	11%
Wednesday	40	15%
Thursday	42	15%
Friday	47	17%
Saturday	43	16%
Sunday	34	12%

Pattern Analysis

28 Tracked Flights:

Data Points: 274
API observations used to build this analysis

Weekdays: 197 flights
Weekend: 77 flights

Business Route More active on weekdays

All Flight Routes

9 Routes

Note: This table shows aggregated route data by airline. Each airline may operate multiple daily flights at different times. See the "Spotted Departure Times" section below for all observed departure times.

Airline	Flight Numbers	Aircraft Type	Typical Time	Days Active	Last Seen	Status
Air Transport International, Inc. `ATN` / `8C`	-	B763	-	M T W T F S S	Jul 2, 2026	Active
Alaska Airlines `ASA` / `AS`		B39M	10:04 10:04 AM (Representative)	M T W T F S S	Jul 2, 2026	Active
Atlas Air `GTI` / `5Y`	-	B744	11:32 11:32 AM (Representative)	M T W T F S S	Jul 2, 2026	Active
Delta Air Lines `DAL` / `DL`		BCS3	19:59 7:59 PM (Representative)	M T W T F S S	Jul 2, 2026	Active
Frontier `FFT` / `F9`		A321	19:50 7:50 PM (Representative)	M T W T F S S	Jul 2, 2026	Active
SkyWest `SKW` / `OO`		E75L	13:40 1:40 PM (Representative)	M T W T F S S	Jul 2, 2026	Active
Southwest `SWA` / `WN`		B38M	06:30 6:30 AM (Representative)	M T W T F S S	Jul 2, 2026	Active
United `UAL` / `UA`		A21N	05:07 5:07 AM (Representative)	M T W T F S S	Jul 2, 2026	Active
Volaris `VOI` / `Y4`		A321	13:25 1:25 PM (Representative)	M T W T F S S	Jul 2, 2026	Active

Total Routes: 9

Active Routes: 9

Unique Airlines: 9

Aircraft Types: 10

Spotted Departure Times

Departure Time	Operator	ICAO	IATA
05:07 5:07 AM	United	`UAL`	`UA`
06:30 6:30 AM	Southwest	`SWA`	`WN`
10:04 10:04 AM	Alaska Airlines	`ASA`	`AS`
11:32 11:32 AM	Atlas Air	`GTI`	`5Y`
13:25 1:25 PM	Volaris	`VOI`	`Y4`
13:40 1:40 PM	SkyWest	`SKW`	`OO`
19:50 7:50 PM	Frontier	`FFT`	`F9`
19:59 7:59 PM	Delta Air Lines	`DAL`	`DL`

Time Information

Times are shown in the departure airport's local timezone (KSEA - America/Los_Angeles).

Total Departure Times: 8

Time Range:
05:07 - 19:59

These are typical departure times observed from actual flights. Times may vary by season and schedule changes.

Seattle to Denver Flights

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