AirHint found the following cheapest return flights from Seattle (SEA) to Sao Paulo (GRU) in March 2026 (see full year).
Return flights
| 17 Mar - 26 Mar | Alaska Airlines | ||
| 17 Mar - 02 Apr | Alaska Airlines | ||
| 01 Mar - 15 Mar | Alaska Airlines | ||
| 14 Mar - 29 Mar | LATAM Airlines Group | ||
| 11 Mar - 11 Apr | Delta |
Also check the deals for one-way flights from Seattle to Sao Paulo in March.
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