Cheapest return flights from Seattle to Sao Paulo in December from 536€

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

Return flights

08 Dec - 12 Dec Frontier Airlines
01 Dec - 12 Dec Hawaiian Airlines
04 Dec - 12 Dec Frontier Airlines
01 Dec - 14 Dec United
01 Dec - 13 Dec Frontier Airlines
04 Dec - 14 Dec LATAM Airlines Group
01 Dec - 08 Dec Hawaiian Airlines
02 Dec - 15 Dec Delta
01 Dec - 11 Jan Hawaiian Airlines
24 Dec - 11 Jan Hawaiian Airlines
14 Dec - 10 Jan Hawaiian Airlines
22 Dec - 06 Jan Frontier Airlines
22 Dec - 07 Jan Frontier Airlines
20 Dec - 07 Jan Hawaiian Airlines
18 Dec - 07 Jan Hawaiian Airlines
21 Dec - 07 Jan Hawaiian Airlines
21 Dec - 05 Jan Hawaiian Airlines

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

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