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

Return flights

23 Sep - 30 Sep	Pegasus Airlines
23 Sep - 29 Sep	Pegasus Airlines
12 Sep - 17 Sep	Scandinavian Airlines
30 Sep - 06 Oct	Ryanair
30 Sep - 22 Oct	Ryanair
30 Sep - 20 Oct	Ryanair
23 Sep - 28 Sep	easyJet
17 Sep - 28 Sep	easyJet
23 Sep - 04 Oct	SKY express
17 Sep - 06 Oct	easyJet
17 Sep - 22 Sep	Wizz Air
16 Sep - 30 Sep	Wizz Air
19 Sep - 01 Oct	Aegean Airlines
25 Sep - 28 Sep	Wizz Air Malta
15 Sep - 17 Sep	Pegasus Airlines
29 Sep - 01 Oct	Ryanair
24 Sep - 29 Sep	Volotea
30 Sep - 01 Oct	Ryanair
30 Sep - 16 Oct	Ryanair
30 Sep - 02 Oct	Ryanair

Also check the deals for one-way flights from Athens 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.

Book a cheap hotel in Copenhagen

Cheap car rent in Copenhagen

Cheapest return flights from Athens to Copenhagen in September from 154€

Return flights