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

Return flights

08 Sep - 10 Sep	Avianca
11 Sep - 18 Sep	Copa
17 Sep - 24 Sep	Copa
05 Sep - 07 Sep	Copa
12 Sep - 19 Sep	Avianca	direct
14 Sep - 21 Sep	Copa
11 Sep - 18 Sep	Avianca	direct
14 Sep - 21 Sep	Avianca	direct
15 Sep - 22 Sep	Avianca	direct
17 Sep - 24 Sep	Avianca	direct

Also check the deals for one-way flights from Guatemala City to San Salvador 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 Guatemala City to San Salvador in September from $260

Return flights