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

Return flights

11 Dec - 18 Dec	United
11 Dec - 15 Dec	American Airlines
03 Dec - 10 Dec	United
25 Dec - 30 Dec	United
23 Dec - 26 Dec	United
25 Dec - 31 Dec	United
05 Dec - 12 Dec	Delta
22 Dec - 01 Jan	United
04 Dec - 07 Dec	United
29 Dec - 04 Jan	Frontier Airlines
30 Dec - 04 Jan	Frontier Airlines
29 Dec - 02 Jan	Frontier Airlines
27 Dec - 01 Jan	Allegiant Air
28 Dec - 02 Jan	Frontier Airlines
29 Dec - 03 Jan	Frontier Airlines
24 Dec - 03 Jan	Frontier Airlines
27 Dec - 02 Jan	Allegiant Air
30 Dec - 04 Jan	United	direct

Also check the deals for one-way flights from Washington to Nassau 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 Nassau in December from $340

Return flights