AirHint found the following cheapest one-way flights from Seattle (SEA) to Cancun (CUN) in March 2026 (see full year).
One-Way flights
| 30 Mar | Volaris | ||
| 30 Mar | Aeromexico | direct | |
| 25 Mar | Southwest Airlines | ||
| 25 Mar | Hawaiian Airlines | direct |
Also check the deals for return flights from Seattle to Cancun in March.
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