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

Return flights

10 Dec - 17 Dec	Aer Lingus
10 Dec - 16 Dec	Lufthansa
11 Dec - 16 Dec	Lufthansa
15 Dec - 23 Dec	SWISS
14 Dec - 02 Jan	Icelandair
25 Dec - 08 Jan	British Airways
22 Dec - 05 Jan	British Airways
21 Dec - 08 Jan	British Airways

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 288€

Return flights