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

Return flights

09 Sep - 22 Sep	United
16 Sep - 30 Sep	United
14 Sep - 27 Sep	United
13 Sep - 18 Oct	United
05 Sep - 18 Sep	United
15 Sep - 30 Oct	United
13 Sep - 27 Sep	United
15 Sep - 23 Sep	United
15 Sep - 02 Oct	United
27 Sep - 07 Oct	United
22 Sep - 28 Sep	Avianca
17 Sep - 25 Sep	Avianca
08 Sep - 24 Sep	United
03 Sep - 24 Sep	United
24 Sep - 01 Oct	Wizz Air Malta

Also check the deals for one-way flights from Madrid 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 Madrid to San Salvador in September from $635

Return flights