AirHint found the following cheapest return flights from Washington (IAD) to Santo Domingo (SDQ) in December 2025 (see full year).

Return flights

08 Dec - 11 Dec	Copa
10 Dec - 31 Dec	Frontier Airlines
14 Dec - 18 Dec	Frontier Airlines
15 Dec - 10 Jan	Frontier Airlines
15 Dec - 29 Dec	Frontier Airlines
20 Dec - 27 Dec	Frontier Airlines
25 Dec - 29 Dec	Frontier Airlines
29 Dec - 06 Jan	Frontier Airlines
29 Dec - 05 Jan	Frontier Airlines
21 Dec - 16 Jan	Frontier Airlines
25 Dec - 01 Jan	Frontier Airlines
23 Dec - 01 Jan	Frontier Airlines
13 Dec - 03 Jan	Frontier Airlines
26 Dec - 04 Jan	Frontier Airlines
20 Dec - 03 Jan	Frontier Airlines
29 Dec - 04 Jan	Frontier Airlines

Also check the deals for one-way flights from Washington to Santo Domingo 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 Washington to Santo Domingo in December from $360

Return flights