Cheap flights from Denver to Seattle

Cheapest current fares: $42 in August 2026, 1,645 km direct flight in ~1h 56m.

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Live fares · DEN → SEA

Cheapest month-by-month fares

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

Denver (DEN) → Seattle (SEA)

  1. August 2026 $42
  2. January 2027 $197

Frequently asked questions

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

    Based on current 6-month forward fare data, August 2026 is the cheapest month to fly from Denver (DEN) to Seattle (SEA), with fares starting from $42.

  • What is the lowest current fare from DEN to SEA?

    The lowest currently-listed fare from Denver (DEN) to Seattle (SEA) is $42 on 2026-08-27.

  • 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.

Related guides for this route

Sibling pages — full route detail, airport overviews, visa context, per-airline routes.

Full route page: DEN → SEA Cheapest month to fly to Seattle All flights from Denver All flights to Seattle Flights to USA Visa-free with USA passport AS routes DL routes F9 routes