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

Return flights

09 Dec - 15 Dec	Austrian Airlines
11 Dec - 19 Dec	Lufthansa
14 Dec - 12 Jan	Austrian Airlines
15 Dec - 23 Dec	SWISS
11 Dec - 14 Dec	Lufthansa
27 Dec - 12 Jan	Lufthansa
25 Dec - 10 Jan	Air Canada
13 Dec - 27 Dec	SWISS
26 Dec - 10 Jan	Scandinavian Airlines
16 Dec - 30 Dec	British Airways
22 Dec - 17 Jan	Iberia
18 Dec - 09 Jan	Aer Lingus
23 Dec - 30 Dec	Icelandair
26 Dec - 02 Jan	Lufthansa
11 Dec - 03 Jan	Lufthansa
18 Dec - 02 Jan	Icelandair
19 Dec - 05 Jan	Azores Airlines

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 332€

Return flights