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

Based on current 6-month forward fare data, May 2026 is the cheapest month to fly from Denver (DEN) to Seattle (SEA), with fares starting from $128.

What is the lowest current fare from DEN to SEA?

The lowest currently-listed fare from Denver (DEN) to Seattle (SEA) is $128 on 2026-05-28.

How long is the flight from Denver to Seattle?

Direct flights from DEN to SEA cover approximately 1,645 km (1,022 miles), with an estimated flight time of 1h 56m. Operating airlines: AS, DL, F9, UA, WN.

Cheap flights from Denver to Seattle

Cheapest current fares: $128 in May 2026, 1,645 km direct flight in ~1h 56m.

Last updated May 24, 2026 · By Flightmaps Editorial

Cheapest month-by-month fares

Lowest available fare per calendar month from Denver (DEN) to Seattle (SEA). Refreshed daily.

Denver (DEN) → Seattle (SEA)

May 2026 $128
July 2026 $129
June 2026 $162

Frequently asked questions

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

Based on current 6-month forward fare data, May 2026 is the cheapest month to fly from Denver (DEN) to Seattle (SEA), with fares starting from $128.
What is the lowest current fare from DEN to SEA?

The lowest currently-listed fare from Denver (DEN) to Seattle (SEA) is $128 on 2026-05-28.
How long is the flight from Denver to Seattle?

Direct flights from DEN to SEA cover approximately 1,645 km (1,022 miles), with an estimated flight time of 1h 56m. Operating airlines: AS, DL, F9, UA, WN.

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