Direct flights from Seattle to Denver SEA → DEN
Alaska Airlines, ATI, Delta Air Lines, Frontier Airlines, Southwest Airlines and United Airlines operate nonstop flights from Seattle (SEA) to Denver (DEN). The nonstop flight takes around ~2h 3m, covering 1,022 miles (1,645 km) and operates multiple daily. Round-trip fares currently start at $153, with a typical fare around $341 across 221 recent fare combinations. Updated 28 June 2026.
60-day flexibility overview based on 221 recent fares across the next 60 days
Cheapest combos
Delta
Best
Delta
Delta
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Alaska Airlines
AS
ATI
8C
Delta Air Lines
DL
Frontier Airlines
F9
Southwest Airlines
WN
United Airlines
UA
Departure Schedule next 7 days
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Frequently asked questions
Is there a direct flight from Seattle to Denver?
Yes, Alaska Airlines, ATI and 4 more airlines operate nonstop flights from Seattle (SEA) to Denver (DEN).
Which airlines fly direct from Seattle to Denver?
Alaska Airlines, ATI, Delta Air Lines, Frontier Airlines, Southwest Airlines, United Airlines operate nonstop flights from Seattle to Denver.
How long is the flight from Seattle to Denver?
The nonstop flight from Seattle to Denver takes ~2h 3m (approximately 1645 km).
How often do direct flights operate from Seattle to Denver?
Nonstop flights from Seattle to Denver operate multiple daily.
How much is a round-trip flight from Seattle to Denver?
Round-trip flights from Seattle (SEA) to Denver (DEN) start at $153, with a typical fare around $341. Based on 221 recent fare combinations.