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

Return flights

31 Dec - 18 Jan	Avianca
31 Dec - 17 Jan	Avianca
31 Dec - 13 Jan	Avianca
31 Dec - 14 Jan	Avianca
31 Dec - 16 Jan	Avianca
31 Dec - 22 Jan	Avianca
16 Dec - 23 Dec	Avianca
15 Dec - 11 Jan	Avianca
30 Dec - 23 Jan	Spirit Airlines
31 Dec - 12 Jan	Avianca
30 Dec - 18 Jan	Frontier Airlines
13 Dec - 20 Dec	Avianca
14 Dec - 29 Dec	Avianca
14 Dec - 22 Dec	Iberia
14 Dec - 27 Dec	Iberia
12 Dec - 31 Dec	Avianca
24 Dec - 31 Dec	Iberia
12 Dec - 20 Dec	Avianca
15 Dec - 29 Dec	Avianca
24 Dec - 29 Dec	Avianca

Also check the deals for one-way flights from San Salvador to Madrid 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 San Salvador to Madrid in December from $824

Return flights