Cheapest return flights from London to Sofia in September from $163

Best time to book flights for London (LHR) to Sofia (SOF) flights at AirHint

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

Return flights

10 Sep - 13 Sep British Airways
28 Sep - 04 Oct British Airways
17 Sep - 20 Sep British Airways
01 Sep - 13 Sep British Airways
01 Sep - 06 Sep British Airways
30 Sep - 12 Oct Austrian Airlines
11 Sep - 15 Sep Austrian Airlines
18 Sep - 21 Sep Austrian Airlines
25 Sep - 28 Sep Austrian Airlines
04 Sep - 09 Sep Austrian Airlines
16 Sep - 21 Sep Austrian Airlines
05 Sep - 10 Sep Lufthansa
29 Sep - 03 Oct Austrian Airlines
27 Sep - 01 Oct Austrian Airlines
26 Sep - 01 Oct Austrian Airlines
26 Sep - 01 Oct British Airways direct

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

Skyscanner

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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