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

Return flights

05 Dec - 11 Dec	Avianca
11 Dec - 20 Dec	Avianca
26 Dec - 25 Jan	Avianca
11 Dec - 21 Dec	Avianca
11 Dec - 22 Dec	Avianca
01 Dec - 14 Dec	Avianca
26 Dec - 15 Jan	Avianca
12 Dec - 12 Jan	Avianca
22 Dec - 20 Jan	Avianca
22 Dec - 31 Dec	Avianca
15 Dec - 01 Jan	Avianca
26 Dec - 13 Jan	Avianca
24 Dec - 13 Jan	Avianca
27 Dec - 10 Jan	Delta
27 Dec - 09 Jan	Delta
04 Dec - 02 Jan	TAP

Also check the deals for one-way flights from Madrid to San Salvador in December.

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 December from 778€

Return flights