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

Return flights

05 Oct - 07 Oct	LATAM Airlines Group
10 Oct - 14 Oct	Avianca
03 Oct - 07 Oct	Avianca
31 Oct - 08 Nov	Avianca
01 Oct - 18 Oct	Avianca
23 Oct - 30 Oct	Air Canada
11 Oct - 25 Oct	Avianca
15 Oct - 23 Oct	Copa
15 Oct - 23 Oct	United	direct
15 Oct - 29 Oct	United	direct
17 Oct - 31 Oct	United	direct
30 Oct - 13 Nov	United	direct
20 Oct - 03 Nov	United
21 Oct - 04 Nov	United
23 Oct - 06 Nov	United
25 Oct - 08 Nov	United
27 Oct - 10 Nov	United
28 Oct - 11 Nov	United
19 Oct - 02 Nov	United	direct
22 Oct - 05 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 $571

Return flights