Cheapest return flights from Boston to Prague in September from $396

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

Return flights

07 Sep - 23 Sep Aer Lingus
16 Sep - 30 Sep Air Canada
25 Sep - 03 Oct Icelandair
04 Sep - 08 Sep Air Canada
09 Sep - 04 Oct Air Canada
30 Sep - 07 Oct SWISS
08 Sep - 04 Oct Air Canada
06 Sep - 20 Sep Air Canada
01 Sep - 27 Sep Lufthansa
18 Sep - 22 Sep Air Canada
11 Sep - 04 Oct SWISS

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

Skyscanner

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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