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

Return flights

17 May - 27 May	Icelandair
27 May - 03 Jun	Icelandair
14 May - 21 May	Iberia
21 May - 28 May	Iberia
11 May - 15 May	Icelandair
27 May - 03 Jun	Condor	direct
17 May - 27 May	Condor	direct
11 May - 15 May	Condor	direct
21 May - 31 May	Aer Lingus
23 May - 06 Jun	Austrian Airlines
14 May - 21 May	Condor	direct
21 May - 28 May	Condor	direct

Also check the deals for one-way flights from Frankfurt to Boston 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 Frankfurt to Boston in May from 477€

Return flights