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

Return flights

03 Dec - 10 Dec	TAP
04 Dec - 09 Dec	Turkish Airlines
04 Dec - 17 Dec	Turkish Airlines
05 Dec - 08 Dec	Air Canada
08 Dec - 15 Dec	Scandinavian Airlines
08 Dec - 22 Dec	Lufthansa
07 Dec - 13 Dec	Icelandair
09 Dec - 16 Dec	Lufthansa
27 Dec - 17 Jan	Lufthansa
10 Dec - 17 Dec	Lufthansa
07 Dec - 14 Dec	Lufthansa
26 Dec - 17 Jan	Austrian Airlines
09 Dec - 07 Jan	Lufthansa
15 Dec - 08 Jan	SWISS
30 Dec - 05 Jan	SWISS
31 Dec - 06 Jan	Turkish Airlines
16 Dec - 10 Jan	Frontier Airlines
25 Dec - 17 Jan	Lufthansa
06 Dec - 07 Jan	Lufthansa
10 Dec - 06 Jan	Lufthansa

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 $530

Return flights