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

Return flights

17 Sep - 15 Oct	KLM
27 Sep - 01 Oct	KLM
20 Sep - 24 Sep	SWISS
17 Sep - 24 Sep	KLM
23 Sep - 28 Sep	SWISS
24 Sep - 29 Sep	KLM
23 Sep - 29 Sep	KLM
10 Sep - 17 Sep	KLM
09 Sep - 17 Sep	KLM
27 Sep - 29 Sep	KLM
20 Sep - 29 Sep	KLM
17 Sep - 22 Sep	KLM
10 Sep - 13 Oct	KLM
16 Sep - 14 Oct	KLM
25 Sep - 01 Oct	British Airways
27 Sep - 04 Oct	KLM
30 Sep - 04 Oct	KLM
13 Sep - 11 Oct	KLM
26 Sep - 04 Oct	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 $420

Return flights