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

Return flights

09 Sep - 16 Sep	Copa
23 Sep - 29 Sep	Copa
09 Sep - 18 Sep	Copa
09 Sep - 17 Sep	Copa
13 Sep - 18 Sep	Copa
10 Sep - 18 Sep	Copa
25 Sep - 02 Oct	Copa
24 Sep - 02 Oct	Copa
30 Sep - 06 Oct	Copa
28 Sep - 03 Oct	Copa
29 Sep - 06 Oct	Copa
10 Sep - 14 Sep	Avianca
19 Sep - 25 Sep	Copa
11 Sep - 15 Sep	Avianca
19 Sep - 23 Sep	Copa
30 Sep - 05 Oct	Avianca
26 Sep - 05 Oct	Avianca
28 Sep - 04 Oct	Avianca

Also check the deals for one-way flights from Quito 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 Quito to San Salvador in September from 293€

Return flights