Denver to Seattle (DEN-SEA): nonstop upgrade & award space

United Airlines, Alaska Airlines, Delta Air Lines, Frontier Airlines, and American Airlines fly nonstop between Denver (DEN) and Seattle (SEA), roughly 155 times a week. With this many departures on a short sector, premium cabins are small and turn over daily, so upgrade or award space opens and closes within hours. 2LNR tracks confirmed upgrade and award space on Alaska Airlines, Delta Air Lines, and American Airlines, on every DEN to SEA departure, so you know which flights have space before you book.

Schedule last confirmed . Departure times come from 2LNR's schedule data; confirm with the airline before you book.

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155
Nonstop flights a week
1,022 mi
Nonstop distance
Free
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Denver to Seattle flight schedule

Scheduled nonstop departures for DEN to SEA, last checked against our schedule feed on September 6, 2026. Airlines retime and cancel flights, so confirm with the airline before you book.

Schedule data dated .

Scheduled nonstop departures from Denver (DEN) to Seattle (SEA)
Date Flight Airline Departs DEN Arrives SEA Duration Aircraft
DL 1731Delta Air Lines06:0007:592h 59m223
F9 4545Frontier Airlines07:1509:193h 4m321
UA 2271United Airlines08:0210:012h 59m738
AS 317Alaska Airlines, Inc.08:2210:223h7M8
UA 1347United Airlines09:4511:442h 59m7M8
UA 2757United Airlines09:4511:442h 59m7M8
UA 648United Airlines09:5811:572h 59m7M8
F9 1175Frontier Airlines11:0513:223h 17m32N
UA 1424United Airlines11:2113:213h32Q
UA 2058United Airlines11:2313:222h 59m32Q
AS 682Alaska Airlines, Inc.12:1714:152h 58m7M8
DL 2740Delta Air Lines12:2014:263h 6m223
AS 381Alaska Airlines, Inc.12:5514:532h 58m73J
DL 1358Delta Air Lines13:4015:463h 6m223
UA 2164United Airlines14:0016:003h320
AS 535Alaska Airlines, Inc.15:0417:002h 56m73J
UA 2013United Airlines15:5517:522h 57m7M9
AS 309Alaska Airlines, Inc.17:4119:413h73J
DL 2543Delta Air Lines18:2820:373h 9m738
AS 615Alaska Airlines, Inc.19:0821:083h7M9
UA 360United Airlines19:3021:313h 1m7M9
DL 1731Delta Air Lines06:0007:592h 59m223
UA 2271United Airlines08:0210:012h 59m738
AS 317Alaska Airlines, Inc.08:2210:223h7M9
UA 1347United Airlines09:4511:442h 59m7M8
UA 2757United Airlines09:4511:442h 59m7M8
UA 1877United Airlines09:5811:572h 59m7M8
UA 648United Airlines09:5811:572h 59m7M8
UA 1424United Airlines11:2113:213h32Q
UA 2058United Airlines11:2313:222h 59m32Q
AS 682Alaska Airlines, Inc.12:1714:152h 58m7M9
DL 2740Delta Air Lines12:2014:263h 6m223
AS 381Alaska Airlines, Inc.12:5514:532h 58m73J
F9 1175Frontier Airlines13:0715:083h 1m32N
DL 1358Delta Air Lines13:4015:463h 6m223
UA 464United Airlines13:5515:522h 57m7M9
UA 650United Airlines13:5515:522h 57m7M9
UA 2164United Airlines14:0016:003h320
AS 535Alaska Airlines, Inc.15:0417:002h 56m73J
UA 2013United Airlines15:4517:422h 57m7M9

Showing the first 40 of 155 scheduled DEN to SEA departures across the next 7 days with service. Every remaining date is on the interactive map.

Departure and arrival times are local at their own airport, so an arrival can fall on a different local date than the departure; the duration column is the true elapsed flying time. A dash means the airline has not filed that value in the schedule data we hold. Aircraft are IATA equipment codes as filed, and can change up to departure.

See every DEN to SEA date on the interactive map

Confirmed upgrade & award space on DEN to SEA departures

2LNR tracks confirmed upgrade and award space on Alaska Airlines, Delta Air Lines, and American Airlines, segment by segment and date by date. Open the calendar for Denver to Seattle to see which departures have space, the next 14 days free on every product and the full horizon on Pro.

See real availability

Confirmed upgrade and award seats on each DEN to SEA departure, checked against live inventory so you know what is open before you book.

Set an alert

Premium inventory turns over fast. Watch this route and 2LNR notifies you when space appears on a date you are tracking.

Plan on the map

See DEN to SEA on the interactive route map, with schedules, connections, and route statistics.

Airlines flying Denver to Seattle nonstop

Carriers operating DEN to SEA nonstop in the current schedule. 2LNR tracks confirmed upgrade and award space on each of them.

See DEN to SEA on the interactive map →

Frequently asked questions about DEN to SEA

How far is Seattle from Denver?
DEN to SEA covers about 1,022 miles nonstop. Flight times vary by aircraft and season; the schedule table on this page lists each scheduled departure with its own times.
Which airlines fly nonstop from DEN to SEA?
United Airlines, Alaska Airlines, Delta Air Lines, Frontier Airlines, and American Airlines fly the route nonstop. 2LNR tracks confirmed upgrade and award space on Alaska Airlines, Delta Air Lines, and American Airlines.
How many flights a week are there from DEN to SEA?
About 155 nonstop flights a week run between Denver and Seattle in the current schedule, operated by United Airlines, Alaska Airlines, Delta Air Lines, Frontier Airlines, and American Airlines. Frequency shifts by season, and the schedule table on this page shows what is scheduled next.
What time do flights from DEN to SEA depart?
Scheduled DEN to SEA nonstops in the next 7 days with service leave between 06:00 and 19:30, local time at Denver. The schedule table on this page lists every departure by date, with its arrival time and aircraft.
How do I check upgrade or award availability on DEN to SEA?
Open the DEN to SEA route on the interactive map or the matrix to see confirmed upgrade and award space by date on Alaska Airlines, Delta Air Lines, and American Airlines, the next 14 days free and the full horizon on Pro. On Pro you can also set an alert on the route and 2LNR notifies you when space opens.

Never miss DEN to SEA upgrade or award space

See what is open by date on this route, the next 14 days free on every product and the full horizon on Pro.

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