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

Return flights

02 Dec - 16 Dec	Copa
10 Dec - 15 Dec	Avianca
02 Dec - 16 Dec	United	direct
16 Dec - 31 Dec	Avianca
17 Dec - 31 Dec	Avianca
28 Dec - 21 Jan	United	direct
11 Dec - 14 Jan	Avianca
02 Dec - 29 Dec	Avianca
02 Dec - 29 Dec	United	direct
06 Dec - 09 Jan	Copa
11 Dec - 08 Jan	Copa
12 Dec - 14 Jan	Copa
27 Dec - 17 Jan	United	direct
15 Dec - 06 Jan	Avianca
22 Dec - 29 Dec	Avianca
19 Dec - 26 Dec	Avianca
21 Dec - 29 Dec	Avianca
19 Dec - 05 Jan	Avianca
28 Dec - 01 Jan	Avianca
11 Dec - 14 Jan	United	direct

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

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.

Book a cheap hotel in Sao Paulo

Cheap car rent in Sao Paulo

Cheapest return flights from Washington to Sao Paulo in December from 570€

Return flights