AirHint found the following cheapest return flights from London (LCY) to Tbilisi (TBS) in September 2025 (see full year).

Return flights

24 Sep - 01 Oct	KLM
27 Sep - 01 Oct	KLM
27 Sep - 06 Oct	KLM
22 Sep - 29 Oct	KLM
30 Sep - 13 Oct	KLM
30 Sep - 06 Oct	KLM
30 Sep - 04 Oct	KLM
27 Sep - 04 Oct	KLM
20 Sep - 04 Oct	KLM
23 Sep - 04 Oct	KLM
24 Sep - 27 Sep	KLM
20 Sep - 24 Sep	KLM
10 Sep - 17 Sep	KLM
23 Sep - 27 Sep	KLM
13 Sep - 17 Sep	KLM
17 Sep - 27 Sep	KLM
13 Sep - 24 Sep	KLM
20 Sep - 27 Sep	KLM
22 Sep - 27 Sep	KLM
21 Sep - 27 Sep	KLM

Also check the deals for one-way flights from London to Tbilisi 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 London to Tbilisi in September from 319€

Return flights