Denver International (DEN) to Seattle-Tacoma International (SEA).
| Departure | Return | Price |
|---|---|---|
| 06/03/2026 | 06/08/2026 | $105 |
| 06/03/2026 | 06/09/2026 | $105 |
| 06/03/2026 | 06/11/2026 | $105 |
| 06/17/2026 | 06/26/2026 | $105 |
| 06/20/2026 | 06/26/2026 | $105 |
| 06/22/2026 | 06/30/2026 | $105 |
| 06/23/2026 | 06/30/2026 | $105 |
| 06/24/2026 | 06/30/2026 | $105 |
| 05/28/2026 | 06/03/2026 | $142 |
| 05/28/2026 | 06/04/2026 | $142 |
Based on current fares, June is the cheapest month to fly from Denver to Seattle, with average fares around $154 round trip (as low as $105).
July tends to be more expensive, averaging $190.
See the full month-by-month and day-of-week price analysis
Best Time to Fly DEN → SEADeparture date prices (economy, round trip). Green = cheap, red = expensive.
The cheapest month to fly from Denver to Seattle is June, with average round-trip fares around $154. Fares in June start as low as $105. The most expensive month is July, averaging $190.
A nonstop flight from Denver to Seattle takes approximately 3h.
The cheapest flight from Denver to Seattle currently starts at $105 round trip in economy class.
The average round-trip flight price from Denver to Seattle is $198 in economy class.
The distance is 1024 miles (1648 km). with a nonstop flight time of about 3h. The lowest fare currently available is $105 departing in June. The average round-trip fare is $198.
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