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

Return flights

30 Aug - 02 Sep	Avianca	direct
29 Aug - 02 Sep	Copa
31 Aug - 04 Sep	Avianca
29 Aug - 02 Sep	Aeromexico	direct
26 Aug - 31 Aug	Aeromexico	direct
27 Aug - 31 Aug	Aeromexico	direct
28 Aug - 31 Aug	Aeromexico	direct
27 Aug - 30 Aug	Aeromexico	direct
22 Aug - 29 Aug	Copa
22 Aug - 23 Aug	Copa
31 Aug - 04 Sep	Aeromexico	direct
19 Aug - 22 Aug	Copa
22 Aug - 24 Aug	Avianca
22 Aug - 22 Aug	Avianca
23 Aug - 23 Aug	Avianca

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

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 August from $248

Return flights