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

Return flights

16 Sep - 20 Sep	airBaltic	direct
18 Sep - 20 Sep	airBaltic	direct
18 Sep - 23 Sep	airBaltic	direct
18 Sep - 25 Sep	airBaltic	direct
16 Sep - 23 Sep	airBaltic	direct
16 Sep - 17 Sep	airBaltic
04 Sep - 11 Sep	airBaltic	direct
18 Sep - 28 Sep	airBaltic
18 Sep - 21 Sep	airBaltic
25 Sep - 30 Sep	airBaltic	direct
29 Sep - 01 Oct	airBaltic

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

Book a cheap hotel in Tallinn

Cheap car rent in Tallinn

Cheapest return flights from London to Tallinn in September from $164

Return flights