Cheapest one-way flights from Seattle to Sao Paulo in December from 432€

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

One-Way flights

19 Dec Frontier Airlines
22 Dec Frontier Airlines
10 Dec United
20 Dec Frontier Airlines
11 Dec United
25 Dec Frontier Airlines
13 Dec Frontier Airlines
15 Dec Frontier Airlines
21 Dec Frontier Airlines
31 Dec LATAM Airlines Group

Also check the deals for return flights from Seattle to Sao Paulo in December.

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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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