AirHint found the following cheapest return flights from Washington (IAD) to San Salvador (SAL) in January 2026 (see full year).

Return flights

01 Jan - 17 Jan	Frontier Airlines	direct
19 Jan - 28 Jan	Avianca	direct
14 Jan - 21 Jan	Avianca	direct
14 Jan - 17 Jan	Frontier Airlines	direct
27 Jan - 29 Jan	Avianca	direct
13 Jan - 27 Jan	Avianca	direct
16 Jan - 23 Jan	Avianca
01 Jan - 29 Jan	Avianca	direct
21 Jan - 28 Jan	Avianca
01 Jan - 13 Feb	Frontier Airlines	direct
12 Jan - 19 Jan	American Airlines
31 Jan - 08 Feb	Avianca
31 Jan - 09 Feb	Avianca
28 Jan - 03 Feb	Avianca	direct
28 Jan - 02 Feb	Avianca	direct
31 Jan - 01 Feb	Avianca
28 Jan - 01 Feb	Avianca	direct
27 Jan - 02 Feb	Avianca	direct
27 Jan - 03 Feb	Avianca	direct
28 Jan - 16 Feb	Avianca	direct

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

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 January from 142€

Return flights