AirHint found the following cheapest one-way flights from Seattle (SEA) to San Salvador (SAL) in March 2026 (see full year).
One-Way flights
| 17 Mar | Frontier Airlines | ||
| 24 Mar | Frontier Airlines | ||
| 25 Mar | Frontier Airlines | ||
| 02 Mar | Avianca | ||
| 09 Mar | Avianca | ||
| 01 Mar | Avianca | ||
| 10 Mar | Avianca | ||
| 03 Mar | Avianca | ||
| 31 Mar | Avianca | ||
| 07 Mar | Avianca |
Also check the deals for return flights from Seattle to San Salvador in March.
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