AirHint found the following cheapest return flights from London (LGW) to Sofia (SOF) in September 2026 (see full year).

Return flights

14 Sep - 18 Sep	Wizz Air UK
14 Sep - 16 Sep	Wizz Air UK
15 Sep - 17 Sep	Wizz Air UK
07 Sep - 11 Sep	Wizz Air
30 Sep - 04 Oct	Wizz Air
22 Sep - 25 Sep	Wizz Air UK
21 Sep - 24 Sep	Wizz Air
03 Sep - 07 Sep	Wizz Air UK
13 Sep - 15 Sep	Wizz Air UK
23 Sep - 30 Sep	Vueling Airlines
16 Sep - 18 Sep	Wizz Air UK
15 Sep - 04 Oct	SKY express
23 Sep - 04 Oct	SKY express
22 Sep - 04 Oct	SKY express
16 Sep - 04 Oct	SKY express
20 Sep - 04 Oct	SKY express

Also check the deals for one-way flights from London to Sofia 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 Sofia in September from $164

Return flights