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

Return flights

23 Sep - 18 Oct	Icelandair
22 Sep - 18 Oct	Icelandair
29 Sep - 13 Oct	Iberia
25 Sep - 18 Oct	Icelandair
24 Sep - 18 Oct	Icelandair
21 Sep - 29 Sep	Icelandair
22 Sep - 29 Sep	Icelandair
21 Sep - 11 Oct	Icelandair
21 Sep - 28 Sep	Icelandair
26 Sep - 05 Oct	Lufthansa
20 Sep - 11 Oct	Icelandair

Also check the deals for one-way flights from Boston to Hahn 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 Hahn in September from 583€

Return flights