AirHint found the following cheapest return flights from Washington (IAD) to Sao Paulo (GRU) in October 2025 (see full year).

Return flights

06 Oct - 15 Oct	Avianca
03 Oct - 05 Oct	Copa
23 Oct - 26 Oct	Copa
14 Oct - 21 Oct	Copa
07 Oct - 28 Oct	Copa
08 Oct - 28 Oct	Copa
01 Oct - 15 Oct	Copa
30 Oct - 06 Nov	Copa
31 Oct - 07 Nov	Avianca
10 Oct - 27 Oct	United	direct
09 Oct - 25 Oct	United	direct
30 Oct - 06 Nov	United	direct
31 Oct - 02 Nov	Avianca
31 Oct - 07 Nov	United	direct
17 Oct - 25 Oct	United	direct
31 Oct - 02 Nov	United	direct

Also check the deals for one-way flights from Washington to Sao Paulo in October.

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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Cheapest return flights from Washington to Sao Paulo in October from 438€

Return flights