Cheap flights from Denver to Seattle

One-way fares from $119 · DEN → SEA · prices found by travellers in the last 48 hours

Compare all dates Seattle → Denver
Cheapest fare
$119

Frontier Airlines · Wed, Nov 11

Cheapest month
November

from $119

Direct flights
Yes

United Airlines

Flight time
3h 07m

1,640 km

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Cheapest month to fly from Denver to Seattle

Lowest one-way fare per person in each month. Choose a month to see every date.

  1. November 2026 Cheapest $119

Cheapest dates in November 2026

The lowest fares we've seen for each day, cheapest first.

Frontier Airlines
Depart12:54 Wed, Nov 11DEN → SEA 5h 44m · 1 stop
$119one way, per person
View deal
Frontier Airlines
Depart22:55 Tue, Nov 10DEN → SEA 5h 37m · 1 stop
$142one way, per person
View deal
Frontier Airlines
Depart22:55 Sun, Nov 15DEN → SEA 5h 37m · 1 stop
$165one way, per person
View deal
Frontier Airlines
Depart12:54 Thu, Nov 12DEN → SEA 5h 44m · 1 stop
$174one way, per person
View deal
Frontier Airlines
Depart12:54 Mon, Nov 9DEN → SEA 5h 44m · 1 stop
$176one way, per person
View deal
United Airlines
Depart07:40 Tue, Nov 3DEN → SEA 3h 07m · Direct
$198one way, per person
View deal
See every date in November 2026 →

Plan the rest of your trip to Seattle

Where to stay, what to do and getting around, from our travel partners.

Where to stay

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Things to do

Things to do in SeattleTours, attractions and day trips on Klook Explore →

Getting around

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About flights from Denver to Seattle

Denver (DEN) and Seattle (SEA) are about 1,640 km apart. Direct flights take around 3h 07m, and recent direct fares were with United Airlines. Over the next few months, one-way fares start from $119, and November 2026 is currently the cheapest month to fly.

These prices come from searches travellers made in the last 48 hours, so they move quickly. If you see a good fare, it's worth booking soon. FlightsExp is free to use: you book directly with our travel partner.

Frequently asked questions

How much is a flight from Denver to Seattle?

The cheapest one-way fare we've seen recently is $119 with Frontier Airlines, departing Wednesday, November 11, 2026.

What is the cheapest month to fly from Denver to Seattle?

November 2026 currently has the lowest fares, from $119 one way.

Are there direct flights from Denver to Seattle?

Yes. Recent direct fares were with United Airlines.

How long is the flight from Denver to Seattle?

A direct flight takes about 3h 07m. Denver and Seattle are around 1,640 km apart.

Which airlines fly from Denver to Seattle?

Recent fares on this route were with Frontier Airlines and United Airlines.

More cheap flights from Denver

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