AirHint found the following cheapest return flights from Frankfurt (FRA) to Boston (BOS) in July 2025 (see full year).

Return flights

22 Jul - 22 Aug	United
28 Jul - 06 Aug	SWISS
17 Jul - 03 Aug	SWISS
16 Jul - 22 Jul	United
28 Jul - 04 Aug	SWISS
19 Jul - 26 Jul	SWISS
16 Jul - 27 Jul	Lufthansa
15 Jul - 27 Jul	Lufthansa
18 Jul - 26 Jul	Lufthansa
17 Jul - 27 Jul	Lufthansa
18 Jul - 25 Jul	Lufthansa
15 Jul - 22 Jul	Lufthansa
27 Jul - 10 Aug	SWISS
24 Jul - 07 Aug	SWISS
22 Jul - 04 Aug	Lufthansa
17 Jul - 25 Jul	SWISS
25 Jul - 08 Aug	Lufthansa
26 Jul - 15 Aug	SWISS
25 Jul - 06 Aug	Austrian Airlines
17 Jul - 21 Jul	Condor	direct

Also check the deals for one-way flights from Frankfurt to Boston in July.

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 July from $597

Return flights