AirHint found the following cheapest return flights from London (LCY) to Sofia (SOF) in October 2025 (see full year).

Return flights

15 Oct - 21 Oct	Lufthansa
16 Oct - 19 Oct	Lufthansa
09 Oct - 13 Oct	Lufthansa
15 Oct - 19 Oct	Lufthansa
10 Oct - 15 Oct	Lufthansa
15 Oct - 20 Oct	Lufthansa
02 Oct - 06 Oct	Lufthansa
09 Oct - 15 Oct	Lufthansa
10 Oct - 13 Oct	Lufthansa
16 Oct - 20 Oct	Lufthansa
24 Oct - 04 Nov	Lufthansa
23 Oct - 05 Nov	KLM
30 Oct - 05 Nov	KLM
01 Oct - 07 Nov	KLM
29 Oct - 02 Nov	KLM
27 Oct - 01 Nov	ITA Airways
26 Oct - 01 Nov	ITA Airways

Also check the deals for one-way flights from London to Sofia in October.

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 Sofia in October from $263

Return flights