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
01 Dec - 04 Dec	Scandinavian Airlines
27 Dec - 17 Jan	Lufthansa
07 Dec - 21 Dec	Lufthansa
04 Dec - 10 Dec	TAP
26 Dec - 17 Jan	Austrian Airlines
12 Dec - 16 Dec	British Airways
15 Dec - 23 Dec	Lufthansa
30 Dec - 06 Jan	Lufthansa
03 Dec - 27 Dec	Scandinavian Airlines
06 Dec - 27 Dec	Lufthansa
28 Dec - 17 Jan	British Airways
16 Dec - 23 Dec	Lufthansa
18 Dec - 10 Jan	Frontier Airlines
19 Dec - 10 Jan	Frontier Airlines
20 Dec - 10 Jan	Frontier Airlines
29 Dec - 03 Jan	SWISS
13 Dec - 03 Jan	Frontier Airlines
27 Dec - 04 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.

Book a cheap hotel in Prague

Cheap car rent in Prague

Cheapest return flights from Washington to Prague in December from 475€

Return flights