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

Return flights

22 Sep - 29 Sep	Iberia
15 Sep - 05 Oct	United
22 Sep - 30 Sep	Iberia
24 Sep - 08 Oct	Iberia
17 Sep - 30 Sep	United
24 Sep - 09 Oct	Iberia
08 Sep - 23 Sep	United
15 Sep - 29 Sep	Iberia
18 Sep - 30 Sep	United
29 Sep - 03 Oct	Iberia
12 Sep - 22 Sep	Ryanair
22 Sep - 28 Sep	Iberia
09 Sep - 16 Sep	United
08 Sep - 22 Sep	United
21 Sep - 08 Oct	Ryanair
22 Sep - 04 Oct	Ryanair
28 Sep - 20 Oct	Avianca
21 Sep - 04 Oct	Ryanair
22 Sep - 06 Oct	Avianca
18 Sep - 04 Oct	Avianca

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 537€

Return flights