AirHint found the following cheapest return flights from Boston (BOS) to Prague (PRG) in May 2026 (see full year).

Return flights

04 May - 13 May	Aer Lingus
19 May - 26 May	Aer Lingus
20 May - 27 May	Aer Lingus
19 May - 27 May	Aer Lingus
07 May - 11 May	SWISS
07 May - 15 May	Aer Lingus
18 May - 01 Jun	SWISS
05 May - 12 May	Scandinavian Airlines
10 May - 17 May	Scandinavian Airlines
11 May - 18 May	Scandinavian Airlines
03 May - 10 May	Scandinavian Airlines
21 May - 04 Jun	Lufthansa
26 May - 16 Jun	SWISS
25 May - 08 Jun	Lufthansa
26 May - 02 Jun	Aer Lingus
27 May - 03 Jun	Aer Lingus

Also check the deals for one-way flights from Boston to Prague in May.

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 May from 327€

Return flights