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

Return flights

29 Sep - 01 Oct	airBaltic
29 Sep - 06 Oct	airBaltic
27 Sep - 30 Sep	Ryanair
24 Sep - 25 Sep	Ryanair
26 Sep - 29 Sep	Scandinavian Airlines
28 Sep - 30 Sep	Norwegian Air Sweden AOC
26 Sep - 28 Sep	Norwegian Air Sweden AOC
24 Sep - 28 Sep	Ryanair
26 Sep - 06 Oct	airBaltic
26 Sep - 30 Oct	airBaltic
26 Sep - 29 Sep	airBaltic	direct
23 Sep - 25 Sep	Ryanair
26 Sep - 03 Oct	Norwegian Air Sweden AOC
27 Sep - 04 Oct	Wizz Air
25 Sep - 28 Sep	Ryanair
27 Sep - 01 Oct	airBaltic
26 Sep - 03 Oct	airBaltic	direct
22 Sep - 29 Sep	airBaltic	direct
24 Sep - 01 Oct	airBaltic	direct
28 Sep - 05 Oct	airBaltic

Also check the deals for one-way flights from Copenhagen to Tallinn 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 Copenhagen to Tallinn in September from 166€

Return flights