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

Return flights

02 Sep - 16 Sep	Spirit Airlines
03 Sep - 16 Sep	Spirit Airlines
11 Sep - 16 Sep	Spirit Airlines
07 Sep - 16 Sep	Spirit Airlines
04 Sep - 16 Sep	Spirit Airlines
03 Sep - 07 Sep	United
04 Sep - 08 Sep	Spirit Airlines
04 Sep - 17 Sep	Copa
28 Sep - 05 Oct	Spirit Airlines
01 Sep - 12 Sep	United
08 Sep - 18 Oct	Copa

Also check the deals for one-way flights from Chicago to San Salvador in September.

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 September from 199€

Return flights