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

Return flights

18 Dec - 30 Dec	Copa
19 Dec - 28 Dec	Spirit Airlines
19 Dec - 30 Dec	Copa
20 Dec - 30 Dec	Copa
19 Dec - 29 Dec	Frontier Airlines
19 Dec - 26 Dec	Frontier Airlines
19 Dec - 20 Dec	Frontier Airlines
20 Dec - 27 Dec	Frontier Airlines
21 Dec - 03 Jan	Spirit Airlines
18 Dec - 01 Jan	Spirit Airlines
18 Dec - 04 Jan	Spirit Airlines
20 Dec - 04 Jan	Spirit Airlines

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

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 Charlotte to San Salvador in December from $596

Return flights