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

Return flights

01 Sep - 10 Sep	Avianca
18 Sep - 21 Sep	Avianca
21 Sep - 27 Sep	Avianca
21 Sep - 27 Sep	Avianca	direct
02 Sep - 01 Oct	Avianca	direct
01 Sep - 10 Sep	Avianca	direct
23 Sep - 28 Sep	Avianca
30 Sep - 05 Oct	Avianca
29 Sep - 06 Oct	Avianca
11 Sep - 21 Sep	Avianca
09 Sep - 17 Sep	Avianca	direct
04 Sep - 07 Sep	Avianca
25 Sep - 28 Sep	Avianca
30 Sep - 07 Oct	Avianca
27 Sep - 02 Oct	Avianca
29 Sep - 03 Oct	Avianca

Also check the deals for one-way flights from San Salvador to Mexico City in September.

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 September from 217€

Return flights