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

Return flights

07 Dec - 14 Dec	United
11 Dec - 14 Dec	United
10 Dec - 14 Dec	United
03 Dec - 07 Dec	United
01 Dec - 08 Dec	United
17 Dec - 25 Dec	United
25 Dec - 29 Dec	United
26 Dec - 30 Dec	United
25 Dec - 30 Dec	United
22 Dec - 29 Dec	United
31 Dec - 03 Jan	United
25 Dec - 01 Jan	United
22 Dec - 02 Jan	Frontier Airlines
20 Dec - 02 Jan	Frontier Airlines
21 Dec - 01 Jan	United
24 Dec - 04 Jan	United
24 Dec - 03 Jan	United
25 Dec - 02 Jan	United
19 Dec - 05 Jan	United
23 Dec - 02 Jan	United

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

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Cheapest return flights from Washington to San Salvador in December from 430€

Return flights