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

Return flights

01 Apr - 14 Apr	Frontier Airlines
07 Apr - 30 Apr	Frontier Airlines
07 Apr - 13 Apr	Frontier Airlines
10 Apr - 17 Apr	Frontier Airlines
07 Apr - 28 Apr	Frontier Airlines
03 Apr - 09 Apr	Avianca
17 Apr - 25 Apr	GOL Linhas Aéreas
30 Apr - 03 May	Copa

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

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 April from 534€

Return flights