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

Return flights

06 May - 11 May	Icelandair
13 May - 17 May	TAP
12 May - 26 May	TAP
06 May - 13 May	Icelandair
21 May - 26 May	Condor	direct
09 May - 16 May	Icelandair
09 May - 23 May	Turkish Airlines
19 May - 26 May	Icelandair
29 May - 05 Jun	Icelandair

Also check the deals for one-way flights from Boston to Frankfurt 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 Frankfurt in May from 494€

Return flights