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

Return flights

04 May - 11 May	Icelandair
07 May - 14 May	Icelandair
05 May - 12 May	Icelandair
10 May - 24 May	TAP
13 May - 27 May	TAP
06 May - 13 May	Icelandair
01 May - 16 May	Icelandair
01 May - 15 May	LEVEL
01 May - 08 May	Icelandair
02 May - 09 May	Icelandair
21 May - 01 Jun	Condor
26 May - 02 Jun	jetBlue
27 May - 03 Jun	jetBlue
28 May - 04 Jun	jetBlue
29 May - 05 Jun	jetBlue
25 May - 01 Jun	Icelandair
30 May - 06 Jun	Icelandair
31 May - 07 Jun	Icelandair
21 May - 01 Jun	United	direct

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 492€

Return flights