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

Return flights

08 Apr - 19 Apr	Lufthansa
03 Apr - 07 Apr	Austrian Airlines
10 Apr - 15 Apr	Austrian Airlines
01 Apr - 05 Apr	Lufthansa
03 Apr - 06 Apr	Austrian Airlines
10 Apr - 15 Apr	British Airways	direct
20 Apr - 26 Apr	Austrian Airlines
23 Apr - 26 Apr	Austrian Airlines
13 Apr - 17 Apr	Austrian Airlines
02 Apr - 06 Apr	Austrian Airlines

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

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 April from $223

Return flights