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

Return flights

14 Aug - 26 Aug	Avianca
24 Aug - 29 Aug	Delta
24 Aug - 04 Sep	Delta
24 Aug - 04 Sep	Avianca	direct
24 Aug - 28 Aug	United
24 Aug - 28 Aug	Avianca	direct
05 Aug - 07 Aug	Avianca
08 Aug - 19 Aug	United
16 Aug - 22 Aug	United
17 Aug - 22 Aug	United
22 Aug - 25 Aug	Copa
26 Aug - 31 Aug	Avianca	direct
20 Aug - 03 Sep	United
13 Aug - 02 Sep	United
21 Aug - 01 Sep	Copa

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 219€

Return flights