Cheapest return flights from Ontario to San Salvador in December from 285€

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

Return flights

07 Dec - 13 Dec Frontier Airlines
08 Dec - 16 Dec Frontier Airlines
07 Dec - 17 Dec Frontier Airlines
14 Dec - 24 Dec Frontier Airlines
02 Dec - 10 Dec Frontier Airlines
14 Dec - 21 Dec Frontier Airlines
01 Dec - 09 Dec Frontier Airlines
09 Dec - 21 Dec Avianca direct
07 Dec - 10 Dec Avianca
16 Dec - 24 Dec Frontier Airlines
18 Dec - 25 Jan Avianca direct

Also check the deals for one-way flights from Ontario to San Salvador in December.

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