Cheapest return flights from Seattle to Sao Paulo in March from $640

AirHint found the following cheapest return flights from Seattle (SEA) to Sao Paulo (GRU) in March 2026 (see full year).

Return flights

03 Mar - 18 Mar American Airlines
04 Mar - 18 Mar United
06 Mar - 08 Mar Delta
24 Mar - 02 Apr Frontier Airlines
08 Mar - 14 Mar Frontier Airlines
20 Mar - 27 Mar American Airlines
20 Mar - 28 Mar American Airlines

Also check the deals for one-way flights from Seattle to Sao Paulo in March.

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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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