Cheapest return flights from Seattle to Sao Paulo in December from 807€

AirHint found the following cheapest return flights from Seattle (SEA) to Sao Paulo (GRU) in December 2025 (see full year).

Return flights

27 Dec - 13 Jan LATAM Airlines Group
10 Dec - 17 Dec United
11 Dec - 18 Dec United
22 Dec - 05 Jan Frontier Airlines
22 Dec - 03 Jan Frontier Airlines
21 Dec - 03 Jan Frontier Airlines
20 Dec - 02 Jan Frontier Airlines
19 Dec - 03 Jan Frontier Airlines

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

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