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

Return flights

03 Sep - 17 Sep	Iberia
01 Sep - 01 Oct	SWISS
22 Sep - 27 Sep	Icelandair
04 Sep - 07 Sep	Icelandair
24 Sep - 01 Oct	United
17 Sep - 04 Oct	SWISS
26 Sep - 05 Oct	SWISS
04 Sep - 08 Sep	Condor
19 Sep - 21 Sep	Iberia

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

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 Berlin in September from 414€

Return flights