Cheapest return flights from Seattle to Cancun in August from $351

AirHint found the following cheapest return flights from Seattle (SEA) to Cancun (CUN) in August 2025 (see full year).

Return flights

15 Aug - 21 Aug Aeromexico
16 Aug - 19 Aug Aeromexico
29 Aug - 04 Sep Aeromexico direct
15 Aug - 18 Aug Delta
07 Aug - 14 Aug Delta
13 Aug - 20 Aug Aeromexico
20 Aug - 30 Aug Aeromexico
11 Aug - 18 Aug Aeromexico
11 Aug - 16 Aug Aeromexico
06 Aug - 10 Aug Aeromexico
04 Aug - 07 Aug Spirit Airlines
28 Aug - 01 Sep Hawaiian Airlines

Also check the deals for one-way flights from Seattle to Cancun in August.

Skyscanner

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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