Seattle-Tacoma International (SEA) to Cancun International (CUN).
| Departure | Return | Price |
|---|---|---|
| 07/29/2026 | 08/05/2026 | $368 |
| 08/05/2026 | 08/12/2026 | $368 |
| 08/05/2026 | 08/10/2026 | $382 |
| 07/09/2026 | 07/18/2026 | $383 |
| 07/16/2026 | 07/25/2026 | $383 |
| 05/27/2026 | 06/04/2026 | $388 |
| 05/27/2026 | 06/05/2026 | $388 |
| 07/15/2026 | 07/21/2026 | $388 |
| 07/22/2026 | 07/30/2026 | $388 |
| 07/22/2026 | 07/31/2026 | $388 |
Based on current fares, August is the cheapest month to fly from Seattle to Cancun, with average fares around $398 round trip (as low as $368).
See the full month-by-month and day-of-week price analysis
Best Time to Fly SEA → CUNDeparture date prices (economy, round trip). Green = cheap, red = expensive.
The cheapest month to fly from Seattle to Cancun is August, with average round-trip fares around $398. Fares in August start as low as $368. The most expensive month is May, averaging $448.
A nonstop flight from Seattle to Cancun takes approximately 5h 30m.
The cheapest flight from Seattle to Cancun currently starts at $368 round trip in economy class.
The average round-trip flight price from Seattle to Cancun is $456 in economy class.
The distance is 2487 miles (4002 km). with a nonstop flight time of about 5h 30m. The lowest fare currently available is $368 departing in July. The average round-trip fare is $456.
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