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

Return flights

04 Dec - 09 Dec	Avianca
04 Dec - 16 Dec	Spirit Airlines
12 Dec - 16 Dec	United
02 Dec - 16 Dec	Spirit Airlines
02 Dec - 27 Dec	United
04 Dec - 23 Dec	Spirit Airlines
16 Dec - 23 Dec	Spirit Airlines
04 Dec - 22 Dec	Spirit Airlines
12 Dec - 23 Dec	Spirit Airlines
22 Dec - 04 Jan	Spirit Airlines
02 Dec - 22 Dec	Spirit Airlines
16 Dec - 04 Jan	Spirit Airlines
16 Dec - 03 Jan	Spirit Airlines
23 Dec - 04 Jan	Spirit Airlines
22 Dec - 03 Jan	Spirit Airlines
23 Dec - 06 Jan	Spirit Airlines
21 Dec - 04 Jan	Spirit Airlines
21 Dec - 03 Jan	Spirit Airlines
22 Dec - 06 Jan	Spirit Airlines
21 Dec - 06 Jan	Spirit Airlines

Also check the deals for one-way flights from Chicago 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 Chicago to San Salvador in December from 286€

Return flights