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

Return flights

10 Sep - 17 Sep	Air Canada
16 Sep - 24 Sep	Air Canada
11 Sep - 18 Sep	Air Canada
11 Sep - 30 Sep	Lufthansa
14 Sep - 21 Sep	Air Canada
17 Sep - 22 Sep	Air Canada
22 Sep - 28 Sep	Air Canada
24 Sep - 28 Sep	Air Canada
15 Sep - 22 Sep	Lufthansa
11 Sep - 14 Sep	Lufthansa
10 Sep - 04 Oct	Air Canada
29 Sep - 25 Oct	Air Canada
22 Sep - 18 Oct	Lufthansa
28 Sep - 02 Oct	Scandinavian Airlines
18 Sep - 04 Oct	Lufthansa

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

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 New York to Copenhagen in September from 371€

Return flights