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

Return flights

10 Sep - 13 Sep	Ryanair
10 Sep - 15 Sep	Ryanair
13 Sep - 15 Sep	Ryanair
16 Sep - 20 Sep	Ryanair
24 Sep - 25 Sep	Scandinavian Airlines
23 Sep - 28 Sep	Ryanair
20 Sep - 27 Sep	Ryanair
03 Sep - 10 Sep	Ryanair
16 Sep - 21 Sep	Ryanair
26 Sep - 29 Sep	Lufthansa
28 Sep - 05 Oct	Scandinavian Airlines
28 Sep - 05 Oct	Brussels Airlines	direct

Also check the deals for one-way flights from Brussels 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 Brussels to Tallinn in September from $167

Return flights