Denver to Seattle Flights (DEN-SEA)

🇺🇸 DEN

Denver

1023 mi

SEA 🇺🇸

Seattle

Denver International Airport Seattle–Tacoma International Airport 9 airlines

The Denver to Seattle route connects Denver International Airport (DEN) in US with Seattle–Tacoma International Airport (SEA) in US. This medium-haul flight covers approximately 1023 miles (1646 km) with a typical flight time of 2h 21m. This route is served by 9 airlines: Alaska Airlines, Southwest, Delta Air Lines and others. AirportRoutes has tracked 30 unique flight numbers on this route.

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Departure Airport

Denver International Airport

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

Destination Airport

Seattle–Tacoma International Airport

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

Operators

Tracked Flights

1023

Miles

2h 21m

Flight Duration

Route Map

Great Circle

Map data © Mapbox © OpenStreetMap contributors

Operating Airlines

Airline	ICAO	IATA
Alaska Airlines	`ASA`	`AS`
Southwest	`SWA`	`WN`
Delta Air Lines	`DAL`	`DL`
United	`UAL`	`UA`
Air Transport International, Inc.	`ATN`	`8C`
Frontier	`FFT`	`F9`
SkyWest	`SKW`	`OO`
Eastern	`EAL`	`2D`
Volaris	`VOI`	`Y4`

Flight Schedule Pattern

Day	Flights Observed	Frequency
Monday	16	12%
Tuesday	21	16%
Wednesday	21	16%
Thursday	25	19%
Friday	14	10%
Saturday	20	15%
Sunday	18	13%

Pattern Analysis

30 Tracked Flights:

Data Points: 135
API observations used to build this analysis

Weekdays: 97 flights
Weekend: 38 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	Aircraft Type	Typical Time	Days Active	Last Seen	Status
Air Transport International, Inc. `ATN` / `8C`	B763	22:00 10:00 PM (Representative)	M T W T F S S	Apr 23, 2026	Active
Alaska Airlines `ASA` / `AS`	B739	06:00 6:00 AM (Representative)	M T W T F S S	Jun 30, 2026	Active
Delta Air Lines `DAL` / `DL`	BCS3	13:08 1:08 PM (Representative)	M T W T F S S	Jun 30, 2026	Active
Eastern `EAL` / `2D`	BCS3	13:08 1:08 PM (Representative)	M T W T F S S	May 27, 2026	Active
Frontier `FFT` / `F9`	A20N	10:16 10:16 AM (Representative)	M T W T F S S	Jun 30, 2026	Active
SkyWest `SKW` / `OO`	E75L	18:50 6:50 PM (Representative)	M T W T F S S	Apr 23, 2026	Active
Southwest `SWA` / `WN`	B38M	20:30 8:30 PM (Representative)	M T W T F S S	Jun 30, 2026	Active
United `UAL` / `UA`	B738	06:00 6:00 AM (Representative)	M T W T F S S	Jun 30, 2026	Active
Volaris `VOI` / `Y4`	A320	10:16 10:16 AM (Representative)	M T W T F S S	Dec 24, 2025	Active

Total Routes: 9

Active Routes: 9

Unique Airlines: 9

Aircraft Types: 9

Spotted Departure Times

Departure Time	Operator	ICAO	IATA
06:00 6:00 AM	Alaska Airlines	`ASA`	`AS`
06:00 6:00 AM	United	`UAL`	`UA`
10:16 10:16 AM	Frontier	`FFT`	`F9`
10:16 10:16 AM	Volaris	`VOI`	`Y4`
13:08 1:08 PM	Delta Air Lines	`DAL`	`DL`
13:08 1:08 PM	Eastern	`EAL`	`2D`
18:50 6:50 PM	SkyWest	`SKW`	`OO`
20:30 8:30 PM	Southwest	`SWA`	`WN`
22:00 10:00 PM	Air Transport International, Inc.	`ATN`	`8C`

Time Information

Times are shown in the departure airport's local timezone (UTC).

Total Departure Times: 9

Time Range:
06:00 - 22:00

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

Denver to Seattle Flights

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