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

Return flights

20 Sep - 30 Oct	Avianca
11 Sep - 23 Sep	Avianca
09 Sep - 23 Sep	Avianca
28 Sep - 08 Oct	Avianca
15 Sep - 22 Sep	Avianca
12 Sep - 15 Sep	Avianca
20 Sep - 22 Sep	Avianca
21 Sep - 28 Sep	Avianca
13 Sep - 29 Sep	Avianca
11 Sep - 27 Sep	Avianca
11 Sep - 26 Sep	Avianca
11 Sep - 29 Oct	Avianca
23 Sep - 17 Oct	Avianca
10 Sep - 25 Sep	Avianca
28 Sep - 11 Oct	Avianca
13 Sep - 11 Oct	Avianca
29 Sep - 11 Oct	Avianca
20 Sep - 04 Oct	Avianca
25 Sep - 02 Oct	Avianca
15 Sep - 02 Oct	Avianca

Also check the deals for one-way flights from San Salvador to Madrid 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 San Salvador to Madrid in September from 591€

Return flights