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

Return flights

09 Sep - 16 Sep	Spirit Airlines
12 Sep - 15 Sep	Avianca	direct
13 Sep - 16 Sep	Avianca
05 Sep - 09 Sep	Avianca
14 Sep - 19 Sep	Avianca	direct
19 Sep - 23 Sep	Avianca	direct
16 Sep - 30 Sep	Avianca	direct
26 Sep - 06 Oct	Avianca	direct
22 Sep - 25 Sep	Avianca	direct
08 Sep - 12 Sep	Avianca	direct
05 Sep - 12 Sep	Avianca	direct
30 Sep - 06 Oct	United	direct

Also check the deals for one-way flights from Houston 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 Houston to San Salvador in September from 149€

Return flights