DEN KDEN → SEA KSEA

Denver International Airport → Seattle–Tacoma International Airport

🇺🇸 Denver, US → 🇺🇸 Seattle, US

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

8

Operators

5

Daily Flights

1023

Miles

2h 38m

Flight Duration

Route Map

Operating Airlines

Southwest ICAO: SWA • IATA: WN

Delta Air Lines ICAO: DAL • IATA: DL

United ICAO: UAL • IATA: UA

Alaska Airlines ICAO: ASA • IATA: AS

Air Transport International, Inc. ICAO: ATN • IATA: 8C

Frontier ICAO: FFT • IATA: F9

Volaris ICAO: VOI • IATA: Y4

SkyWest ICAO: SKW • IATA: OO

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

Flight Schedule Pattern

Day	Flights Observed	Frequency
Monday	9	13%
Tuesday	16	23%
Wednesday	4	6%
Thursday	12	17%
Friday	8	11%
Saturday	12	17%
Sunday	10	14%

Pattern Analysis

5 Daily Flights:

SWA2628 ASA535 SWA2919 FFT2746 VOI2746

Data Points: 71
API observations used to build this analysis

Weekdays: 49 flights
Weekend: 22 flights

Business Route More active on weekdays

All Flight Routes

8 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	Oct 21, 2025	Active
Alaska Airlines `ASA` / `AS`	-	B739	-	M T W T F S S	Nov 18, 2025	Active
Delta Air Lines `DAL` / `DL`	-	BCS1	-	M T W T F S S	Nov 1, 2025	Active
Frontier `FFT` / `F9`	FFT2746	A320	09:42 9:42 AM (Representative)	M T W T F S S	Dec 8, 2025	Active
SkyWest `SKW` / `OO`	-	E75L	07:21 7:21 AM (Representative)	M T W T F S S	Nov 30, 2025	Active
Southwest `SWA` / `WN`	SWA2628 ASA535 SWA2919	B38M	14:50 2:50 PM (Representative)	M T W T F S S	Dec 6, 2025	Active
United `UAL` / `UA`	-	B739	-	M T W T F S S	Nov 15, 2025	Active
Volaris `VOI` / `Y4`	VOI2746	A320	09:42 9:42 AM (Representative)	M T W T F S S	Dec 8, 2025	Active

Total Routes: 8

Active Routes: 8

Unique Airlines: 8

Aircraft Types: 8

Spotted Departure Times

Departure Time	Operator	ICAO	IATA
07:21 7:21 AM	SkyWest	`SKW`	`OO`
09:42 9:42 AM	Frontier	`FFT`	`F9`
09:42 9:42 AM	Volaris	`VOI`	`Y4`
14:50 2:50 PM	Southwest	`SWA`	`WN`

Time Information

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

Total Departure Times: 4

Time Range:
07:21 - 14:50

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