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

Return flights

04 Dec - 08 Dec	Avianca	direct
04 Dec - 07 Dec	Avianca
04 Dec - 09 Dec	Avianca
24 Dec - 19 Jan	Avianca
24 Dec - 31 Dec	Avianca
02 Dec - 06 Dec	Avianca	direct
02 Dec - 07 Dec	Avianca
08 Dec - 11 Dec	Avianca
03 Dec - 03 Dec	Avianca	direct
03 Dec - 05 Dec	Avianca	direct
04 Dec - 11 Dec	Avianca
26 Dec - 11 Jan	Avianca
25 Dec - 11 Jan	Avianca
23 Dec - 19 Jan	Avianca
23 Dec - 18 Jan	Avianca
03 Dec - 01 Jan	Avianca
15 Dec - 01 Jan	Avianca
31 Dec - 07 Jan	Avianca
19 Dec - 12 Jan	Avianca
29 Dec - 10 Jan	Avianca

Also check the deals for one-way flights from Mexico City 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 Mexico City to San Salvador in December from 173€

Return flights