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

Return flights

22 Sep - 24 Sep	Ryanair
25 Sep - 30 Sep	Ryanair
29 Sep - 30 Sep	Ryanair
23 Sep - 24 Sep	Ryanair
28 Sep - 05 Oct	Scandinavian Airlines
27 Sep - 04 Oct	Ryanair
23 Sep - 25 Sep	Ryanair
22 Sep - 23 Sep	Ryanair
24 Sep - 30 Sep	Scandinavian Airlines
26 Sep - 30 Sep	Ryanair
22 Sep - 29 Sep	Ryanair
30 Sep - 01 Oct	Ryanair
25 Sep - 29 Sep	Ryanair

Also check the deals for one-way flights from Tallinn to Brussels 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 Tallinn to Brussels in September from $161

Return flights