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

Alaska Airlines, United Airlines, Delta Air Lines, and Frontier Airlines fly nonstop between Denver (DEN) and Seattle (SEA), roughly 97 times a week. The timetable below shows the nonstop scheduled at 2h 57m to 3h 13m for the 1,022 miles. 2LNR checks confirmed upgrade and award space on Alaska Airlines and Delta Air Lines flights on this route, so you can see which departures have space before you book.

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

Updated .

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97
Flights a week, 4-week average
2h 57m to 3h 13m
Scheduled flight time
1,022 mi
Nonstop distance
Free
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Denver to Seattle flight schedule

Scheduled nonstop departures for DEN to SEA starting October 21, 2026, last checked against our schedule feed on October 18, 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 Lines06:0008:103h 10mAirbus A220-300
AS 317Alaska Airlines, Inc.07:0709:103h 3mBoeing 737-800
F9 4545Frontier Airlines07:4509:513h 6mAirbus A320
UA 1348United Airlines08:0210:012h 59mBoeing 737 MAX 8
UA 2058United Airlines11:2213:212h 59mAirbus A321neo family
AS 682Alaska Airlines, Inc.12:0013:592h 59mBoeing 737 MAX 9
DL 2740Delta Air Lines12:2014:313h 11mAirbus A220-300
F9 1175Frontier Airlines13:0715:123h 5mAirbus A320
DL 1358Delta Air Lines13:5516:083h 13mAirbus A220-300
AS 567Alaska Airlines, Inc.15:3017:292h 59mBoeing 737 MAX 9
UA 2013United Airlines15:4017:372h 57mBoeing 737 MAX 9
AS 615Alaska Airlines, Inc.17:5719:583h 1mBoeing 737 MAX 9
DL 2543Delta Air Lines18:4220:483h 6mAirbus A220-300
UA 2767United Airlines19:1421:153h 1mAirbus A321neo family
UA 2651United Airlines20:5822:593h 1mBoeing 737-800
DL 1731Delta Air Lines06:0008:103h 10mAirbus A220-300
AS 317Alaska Airlines, Inc.07:0709:103h 3mBoeing 737-800
F9 4545Frontier Airlines07:4509:513h 6mAirbus A320
UA 1348United Airlines08:0310:022h 59mBoeing 737 MAX 8
UA 2058United Airlines11:2213:212h 59mBoeing 737-900
AS 682Alaska Airlines, Inc.12:0013:592h 59mBoeing 737 MAX 9
DL 2740Delta Air Lines12:2014:313h 11mAirbus A220-300
F9 1175Frontier Airlines13:0715:123h 5mAirbus A321
DL 1358Delta Air Lines13:5516:083h 13mAirbus A220-300
UA 2833United Airlines14:0516:032h 58mAirbus A321neo family
AS 567Alaska Airlines, Inc.15:3017:292h 59mBoeing 737 MAX 9
UA 2013United Airlines15:4017:372h 57mBoeing 737 MAX 9
AS 615Alaska Airlines, Inc.17:5719:583h 1mBoeing 737-900
DL 2543Delta Air Lines18:4220:483h 6mAirbus A220-300
UA 2767United Airlines19:1421:153h 1mAirbus A321neo family
UA 2651United Airlines20:5822:593h 1mBoeing 737-800
DL 1731Delta Air Lines06:0008:103h 10mAirbus A220-300
AS 317Alaska Airlines, Inc.07:0709:103h 3mBoeing 737-900
F9 4545Frontier Airlines07:4509:513h 6mAirbus A320
UA 1348United Airlines08:0210:012h 59mBoeing 737 MAX 8
UA 2058United Airlines11:2213:212h 59mBoeing 737 MAX 8
AS 682Alaska Airlines, Inc.12:0013:592h 59mBoeing 737-900
F9 1175Frontier Airlines13:0715:123h 5mAirbus A321
DL 1358Delta Air Lines13:5516:083h 13mAirbus A220-300
UA 2833United Airlines14:0516:032h 58mAirbus A321neo family

Showing the first 40 of 102 scheduled DEN to SEA departures across 7 days with service, starting October 21, 2026. 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 hasn't filed that value in the schedule data we hold. Aircraft are the equipment the airline filed, named where the code pins down one type and shown as the family or the bare code where it doesn't. Swaps can happen up to departure.

See every DEN to SEA date on the interactive map

Aircraft on the Denver to Seattle nonstop

In the schedule table on this page, United Airlines flies the Airbus A321neo family, the Boeing 737 MAX 8, the Boeing 737 MAX 9, the Boeing 737-800, and the Boeing 737-900. Delta Air Lines flies the Airbus A220-300. Alaska Airlines flies the Boeing 737 MAX 9, the Boeing 737-900, and the Boeing 737-800. Frontier Airlines flies the Airbus A320. The Aircraft column has the rest. Each linked aircraft page shows where that airline schedules it. Airlines can swap aircraft up to departure.

Confirmed upgrade & award space on DEN to SEA departures

2LNR tracks confirmed upgrade and award space on Alaska Airlines and Delta Air Lines, 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.

In the 7 days to October 19, 2026, 2LNR checked award space on Denver to Seattle departures from October 19 to November 1. Alaska Airlines had space open on 7 of 14 dates checked and Delta Air Lines on 14 of 14.

See real availability

Confirmed upgrade or award seats by date on the DEN to SEA departures 2LNR tracks, checked against live inventory so you know what's open before you book.

Set an alert

Premium inventory turns over fast. Watch this route on Pro and 2LNR notifies you when space appears on a date you're 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. Where 2LNR tracks the carrier, its departures show confirmed upgrade or award space by date.

See DEN to SEA on the interactive map →

Frequently asked questions about DEN to SEA

How long is the flight from Denver (DEN) to Seattle (SEA)?
Scheduled flight times from Denver (DEN) to Seattle (SEA) run from 2h 57m to 3h 13m across the departures in the schedule table on this page. The nonstop covers about 1,022 miles, and airlines adjust scheduled times by season, so confirm with the airline before you book.
Which airlines fly nonstop from DEN to SEA?
Alaska Airlines, United Airlines, Delta Air Lines, and Frontier Airlines fly DEN to SEA nonstop. 2LNR tracks confirmed upgrade and award space on Alaska Airlines and Delta Air Lines.
How many flights a week are there from DEN to SEA?
About 97 nonstop flights a week run between Denver (DEN) and Seattle (SEA) in the current schedule, operated by Alaska Airlines, United Airlines, Delta Air Lines, and Frontier 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 20:58, local time at Denver. The schedule table on this page lists every departure by date, with its arrival time and aircraft.
Which flights operate DEN to SEA nonstop?
The schedule table on this page lists 16 flight numbers for DEN to SEA nonstops, including UA 1348 and UA 2058 on United Airlines; AS 317 and AS 682 on Alaska Airlines; DL 1358 and DL 1731 on Delta Air Lines; and F9 1175 and F9 4545 on Frontier Airlines. The table lists each departure by date with its times 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 and Delta Air Lines, 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's open by date on this route, the next 14 days free on every product and the full horizon on Pro.

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