Cheapest return flights from Seattle to Sao Paulo in September from $479

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

Return flights

06 Sep - 19 Sep LATAM Airlines Group
16 Sep - 28 Sep LATAM Airlines Group
05 Sep - 21 Sep LATAM Airlines Group
11 Sep - 20 Sep LATAM Airlines Group
12 Sep - 20 Sep LATAM Airlines Group
18 Sep - 25 Sep American Airlines
05 Sep - 19 Sep Delta
05 Sep - 20 Sep Delta
29 Sep - 05 Oct Delta

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

Skyscanner

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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