AirHint found the following cheapest return flights from Washington (DCA) to Prague (PRG) in December 2025 (see full year).

Return flights

04 Dec - 09 Dec	Delta
28 Dec - 13 Jan	Delta
29 Dec - 12 Jan	British Airways
11 Dec - 16 Dec	Delta
12 Dec - 19 Dec	Icelandair
12 Dec - 16 Dec	Delta
12 Dec - 18 Dec	Delta
30 Dec - 03 Jan	jetBlue
13 Dec - 19 Dec	Delta
25 Dec - 01 Jan	Delta
23 Dec - 30 Dec	Frontier Airlines
21 Dec - 28 Dec	Delta
30 Dec - 04 Jan	Delta
13 Dec - 03 Jan	Scandinavian Airlines
12 Dec - 03 Jan	TAP

Also check the deals for one-way flights from Washington to Prague 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 Prague in December from 661€

Return flights