AirHint found the following cheapest return flights from San Salvador (SAL) to Washington (IAD) in August 2025 (see full year).

Return flights

07 Aug - 14 Aug	Avianca
21 Aug - 26 Aug	Spirit Airlines
07 Aug - 10 Aug	Avianca
12 Aug - 19 Aug	Avianca
18 Aug - 25 Aug	American Airlines
19 Aug - 26 Aug	United
02 Aug - 21 Aug	Volaris El Salvador	direct
21 Aug - 26 Aug	Volaris El Salvador	direct
01 Aug - 06 Aug	Volaris El Salvador	direct
07 Aug - 10 Aug	Volaris El Salvador	direct
13 Aug - 02 Sep	Avianca

Also check the deals for one-way flights from San Salvador to Washington in August.

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 San Salvador to Washington in August from $256

Return flights