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

Return flights

28 Aug - 02 Sep	Avianca	direct
22 Aug - 05 Sep	Volaris El Salvador	direct
14 Aug - 13 Sep	Avianca	direct
05 Aug - 12 Aug	Avianca
27 Aug - 07 Sep	Avianca	direct
22 Aug - 30 Aug	Avianca
15 Aug - 05 Sep	Avianca
04 Aug - 25 Aug	Avianca	direct
28 Aug - 01 Sep	Avianca	direct
14 Aug - 01 Sep	Avianca	direct
07 Aug - 14 Aug	Avianca
30 Aug - 07 Sep	Volaris El Salvador	direct
15 Aug - 30 Aug	Avianca
22 Aug - 01 Sep	Volaris El Salvador	direct
14 Aug - 26 Aug	Avianca	direct
11 Aug - 24 Aug	Avianca
19 Aug - 26 Aug	Avianca	direct
02 Aug - 06 Aug	Avianca
14 Aug - 21 Aug	Avianca
15 Aug - 05 Sep	Avianca	direct

Also check the deals for one-way flights from Washington to San Salvador 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 Washington to San Salvador in August from $262

Return flights