Seattle-Tacoma International (SEA) to Denver International (DEN).
| Departure | Return | Price |
|---|---|---|
| 05/27/2026 | 06/03/2026 | $105 |
| 05/28/2026 | 06/03/2026 | $105 |
| 05/31/2026 | 06/09/2026 | $105 |
| 06/01/2026 | 06/09/2026 | $105 |
| 06/03/2026 | 06/09/2026 | $105 |
| 06/03/2026 | 06/11/2026 | $105 |
| 06/03/2026 | 06/12/2026 | $105 |
| 06/04/2026 | 06/09/2026 | $105 |
| 06/04/2026 | 06/11/2026 | $105 |
| 06/04/2026 | 06/12/2026 | $105 |
Based on current fares, May is the cheapest month to fly from Seattle to Denver, with average fares around $160 round trip (as low as $105).
See the full month-by-month and day-of-week price analysis
Best Time to Fly SEA → DENDeparture date prices (economy, round trip). Green = cheap, red = expensive.
The cheapest month to fly from Seattle to Denver is May, with average round-trip fares around $160. Fares in May start as low as $105. The most expensive month is July, averaging $188.
A nonstop flight from Seattle to Denver takes approximately 3h.
The cheapest flight from Seattle to Denver currently starts at $105 round trip in economy class.
The average round-trip flight price from Seattle to Denver is $193 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 May. The average round-trip fare is $193.
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