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

Return flights

22 Sep - 07 Oct	Scandinavian Airlines	direct
16 Sep - 23 Sep	Spirit Airlines
25 Sep - 08 Oct	Scandinavian Airlines	direct
16 Sep - 23 Sep	Scandinavian Airlines	direct
03 Sep - 09 Sep	Delta
17 Sep - 21 Sep	Air Canada
25 Sep - 04 Oct	Scandinavian Airlines	direct

Also check the deals for one-way flights from Atlanta 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 Atlanta to Copenhagen in September from $528

Return flights