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

Return flights

17 Dec - 25 Dec	Aeromexico	direct
29 Dec - 19 Jan	Avianca
23 Dec - 01 Jan	Avianca	direct
28 Dec - 05 Jan	Avianca	direct
23 Dec - 26 Dec	Aeromexico	direct
21 Dec - 25 Dec	Avianca	direct
29 Dec - 02 Jan	Avianca	direct
23 Dec - 31 Dec	Avianca	direct
21 Dec - 05 Jan	Avianca	direct
26 Dec - 01 Jan	Avianca	direct
26 Dec - 31 Dec	Avianca	direct
18 Dec - 04 Jan	Aeromexico	direct
04 Dec - 10 Dec	Avianca
05 Dec - 10 Dec	Avianca	direct
05 Dec - 09 Dec	Avianca	direct
02 Dec - 08 Dec	Avianca	direct
20 Dec - 25 Dec	Aeromexico	direct
26 Dec - 03 Jan	Aeromexico	direct
28 Dec - 02 Jan	Aeromexico	direct
23 Dec - 02 Jan	Aeromexico	direct

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 $241

Return flights