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

Return flights

20 Aug - 24 Aug	Fly Play
27 Aug - 31 Aug	Fly Play
12 Aug - 19 Aug	Air Canada
28 Aug - 01 Sep	TAP
24 Aug - 31 Aug	TAP
10 Aug - 19 Aug	Icelandair
29 Aug - 09 Sep	Icelandair
06 Aug - 21 Aug	Icelandair
05 Aug - 12 Aug	Icelandair
11 Aug - 18 Aug	Icelandair
21 Aug - 28 Aug	Icelandair
30 Aug - 06 Sep	Icelandair
05 Aug - 11 Aug	Icelandair
27 Aug - 03 Sep	Scandinavian Airlines	direct
28 Aug - 01 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 $407

Return flights