Cheapest return flights from Ontario to San Salvador in December from $476

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

Return flights

30 Dec - 12 Jan Frontier Airlines
27 Dec - 10 Jan Frontier Airlines
29 Dec - 19 Jan Frontier Airlines
27 Dec - 12 Jan Frontier Airlines
27 Dec - 08 Jan Frontier Airlines
31 Dec - 10 Jan Frontier Airlines
29 Dec - 08 Jan Frontier Airlines
30 Dec - 01 Jan American Airlines
26 Dec - 25 Jan Frontier Airlines
30 Dec - 10 Jan Frontier Airlines
26 Dec - 31 Dec Frontier Airlines
27 Dec - 28 Dec Frontier Airlines
26 Dec - 29 Dec Frontier Airlines
26 Dec - 30 Dec Frontier Airlines
28 Dec - 30 Dec Frontier Airlines
28 Dec - 31 Dec Volaris
27 Dec - 28 Dec Avianca direct
28 Dec - 30 Dec Avianca direct

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

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