Cheapest return flights from Boston to Copenhagen in September from $342

Best time to book flights for Boston (BOS) to Copenhagen (CPH) flights at AirHint

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

Return flights

11 Sep - 16 Sep Fly Play
01 Sep - 06 Sep Fly Play
22 Sep - 29 Sep Scandinavian Airlines direct
11 Sep - 16 Sep Scandinavian Airlines direct
07 Sep - 11 Sep Icelandair
02 Sep - 09 Sep Scandinavian Airlines direct
07 Sep - 14 Sep Icelandair
12 Sep - 19 Sep Icelandair
17 Sep - 24 Sep Icelandair
07 Sep - 14 Sep Scandinavian Airlines direct

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

Skyscanner

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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