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

Return flights

09 Dec - 10 Dec	Air Canada
31 Dec - 07 Jan	United
30 Dec - 07 Jan	United
14 Dec - 17 Dec	United
24 Dec - 31 Dec	United
11 Dec - 14 Dec	United
29 Dec - 07 Jan	United
24 Dec - 29 Dec	United
25 Dec - 31 Dec	American Airlines
25 Dec - 30 Dec	United
18 Dec - 21 Dec	United
31 Dec - 05 Jan	American Airlines
12 Dec - 15 Dec	Air Canada
21 Dec - 23 Dec	United
25 Dec - 01 Jan	United
31 Dec - 04 Jan	Frontier Airlines
25 Dec - 04 Jan	Frontier Airlines
30 Dec - 04 Jan	Frontier Airlines
31 Dec - 05 Jan	United	direct
30 Dec - 03 Jan	Frontier Airlines

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 $337

Return flights