AirHint found the following cheapest return flights from Seattle (SEA) to San Salvador (SAL) in May 2026 (see full year).
Return flights
| 11 May - 19 May | Frontier Airlines | ||
| 12 May - 19 May | Frontier Airlines | ||
| 01 May - 09 May | Alaska Airlines | ||
| 21 May - 25 May | Volaris | ||
| 20 May - 04 Jun | Copa |
Also check the deals for one-way flights from Seattle to San Salvador in May.
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