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

Return flights

01 Dec - 11 Dec	Avianca	direct
01 Dec - 06 Dec	Avianca	direct
18 Dec - 25 Dec	Avianca
01 Dec - 04 Dec	Avianca	direct
04 Dec - 09 Dec	Avianca
21 Dec - 25 Dec	Avianca	direct
02 Dec - 06 Dec	Avianca	direct
16 Dec - 07 Jan	Avianca	direct
15 Dec - 31 Dec	Avianca
23 Dec - 31 Dec	Avianca
23 Dec - 01 Jan	Avianca	direct
01 Dec - 08 Dec	Aeromexico	direct
26 Dec - 01 Jan	Avianca
28 Dec - 02 Jan	Avianca	direct
29 Dec - 02 Jan	Avianca
26 Dec - 01 Jan	Avianca	direct
26 Dec - 03 Jan	Avianca	direct
26 Dec - 04 Jan	Avianca	direct
29 Dec - 02 Jan	Avianca	direct
21 Dec - 05 Jan	Avianca

Also check the deals for one-way flights from San Salvador to Mexico City 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 Mexico City in December from 214€

Return flights