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

Return flights

07 Dec - 26 Jan	Lufthansa
01 Dec - 08 Dec	Lufthansa
01 Dec - 16 Dec	SWISS
07 Dec - 26 Dec	Lufthansa
08 Dec - 26 Dec	SWISS
07 Dec - 27 Dec	Lufthansa
10 Dec - 17 Dec	Austrian Airlines
07 Dec - 08 Jan	Lufthansa
08 Dec - 27 Dec	SWISS
08 Dec - 28 Dec	SWISS
08 Dec - 08 Jan	SWISS
07 Dec - 28 Dec	Lufthansa
07 Dec - 07 Jan	Lufthansa
08 Dec - 07 Jan	SWISS
07 Dec - 06 Jan	Lufthansa
06 Dec - 28 Dec	Lufthansa
08 Dec - 06 Jan	SWISS
29 Dec - 07 Jan	SWISS
08 Dec - 05 Jan	SWISS
27 Dec - 12 Jan	Lufthansa

Also check the deals for one-way flights from Boston 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 Boston to Prague in December from 307€

Return flights