Outbound
2 hours 50 minutes
Return
2 hours 35 minutes
Daily Flights
12+
Airlines
4
Timezone note
Seattle is 1 hour behind Denver (Pacific vs Mountain Time).
About this route
Denver to Seattle flights
Denver to Seattle links the Rocky Mountain hub with the Pacific Northwest's largest city. United and Alaska compete for business travelers, while Southwest and Frontier offer budget-friendly alternatives. Flight frequency peaks during ski season and summer outdoor travel.
Seattle's low cloud ceilings rarely close the airport but can trigger instrument approaches that space out landings. Denver's afternoon convective storms are the bigger delay risk on this route. SMS alerts let pickup drivers know exactly when to head to baggage claim.
Airlines
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FAQ
Frequently asked questions.
How long is the Denver to Seattle flight?
About 2 hours 50 minutes northwestbound and 2 hours 35 minutes on the return.
Which airlines fly DEN to SEA nonstop?
United, Alaska, Southwest, and Frontier all operate nonstop service.
Are DEN-SEA flights often delayed?
Denver afternoon thunderstorms are the main delay risk. Seattle weather rarely causes cancellations but can slow arrivals.
Know when they land in Seattle
Avoid waiting at arrivals. Get a text the moment their Denver to Seattle flight touches down.
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Aviation lover who built SkyText because families deserve to know when someone lands safely. Has tracked more flights than he'd like to admit.