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

Return flights

01 Dec - 17 Dec	Air Canada
08 Dec - 22 Dec	Air Canada
30 Dec - 08 Jan	Air Canada
02 Dec - 09 Dec	SWISS
03 Dec - 10 Dec	SWISS
15 Dec - 23 Dec	American Airlines
11 Dec - 25 Dec	Scandinavian Airlines
16 Dec - 13 Jan	Iberia
27 Dec - 19 Jan	Aer Lingus
27 Dec - 18 Jan	Aer Lingus
06 Dec - 27 Dec	Air Canada
27 Dec - 12 Jan	Aer Lingus
05 Dec - 27 Dec	Air Canada
09 Dec - 20 Dec	Aer Lingus
18 Dec - 09 Jan	Aer Lingus
22 Dec - 31 Dec	Aer Lingus
22 Dec - 06 Jan	Iberia
09 Dec - 03 Jan	TAP
12 Dec - 02 Jan	Aer Lingus

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 $363

Return flights