AirHint found the following cheapest return flights from Washington (IAD) to Sao Paulo (GRU) in March 2026 (see full year).

Return flights

06 Mar - 10 Mar	Avianca
03 Mar - 10 Mar	Avianca
31 Mar - 10 Apr	Avianca
31 Mar - 01 Apr	Avianca
11 Mar - 17 Mar	Copa
15 Mar - 24 Mar	Copa
08 Mar - 13 Mar	Copa
01 Mar - 16 Mar	Copa
09 Mar - 13 Mar	Copa
11 Mar - 29 Mar	GOL Linhas Aéreas
03 Mar - 15 Mar	Avianca
25 Mar - 02 Apr	GOL Linhas Aéreas
25 Mar - 03 Apr	GOL Linhas Aéreas
01 Mar - 16 Mar	United	direct
25 Mar - 04 Apr	Copa
27 Mar - 06 Apr	Allegiant Air
27 Mar - 05 Apr	Allegiant Air
26 Mar - 04 Apr	Frontier Airlines

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

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 March from 319€

Return flights