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

Return flights

17 Sep - 23 Sep	SWISS
15 Sep - 21 Sep	Lufthansa
19 Sep - 23 Sep	ITA Airways
09 Sep - 16 Sep	SWISS
15 Sep - 19 Sep	Lufthansa
24 Sep - 01 Oct	Lufthansa
20 Sep - 28 Sep	KLM
12 Sep - 16 Sep	ITA Airways
29 Sep - 01 Oct	Lufthansa
08 Sep - 14 Sep	Lufthansa
17 Sep - 24 Sep	Air Dolomiti
10 Sep - 15 Sep	SWISS
30 Sep - 05 Oct	KLM
27 Sep - 05 Oct	KLM

Also check the deals for one-way flights from London to Bourgas 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 Bourgas in September from $482

Return flights