AirHint found the following cheapest return flights from Boston (BOS) to Copenhagen (CPH) in August 2025 (see full year).

Return flights

18 Aug - 26 Aug	British Airways
13 Aug - 20 Aug	Icelandair
21 Aug - 26 Aug	Lufthansa
11 Aug - 18 Aug	Icelandair
07 Aug - 14 Aug	Lufthansa
17 Aug - 22 Aug	Fly Play
08 Aug - 15 Aug	Virgin Atlantic
14 Aug - 19 Aug	Icelandair
20 Aug - 27 Aug	Icelandair
22 Aug - 29 Aug	Icelandair
28 Aug - 04 Sep	Icelandair
30 Aug - 06 Sep	Icelandair
29 Aug - 02 Sep	Icelandair
26 Aug - 02 Sep	Icelandair
29 Aug - 02 Sep	Scandinavian Airlines	direct
29 Aug - 09 Sep	SWISS
30 Aug - 06 Sep	Scandinavian Airlines	direct

Also check the deals for one-way flights from Boston to Copenhagen in August.

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 Copenhagen in August from 353€

Return flights