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

Return flights

22 Apr - 26 Apr	British Airways	direct
17 Apr - 22 Apr	British Airways	direct
24 Apr - 27 Apr	Aegean Airlines
05 Apr - 25 Apr	Air Serbia
24 Apr - 27 Apr	British Airways	direct
17 Apr - 26 Apr	British Airways	direct
03 Apr - 13 Apr	SWISS
04 Apr - 25 Apr	SWISS
03 Apr - 25 Apr	SWISS
14 Apr - 19 Apr	SWISS
25 Apr - 04 May	SWISS
07 Apr - 02 May	SWISS
25 Apr - 02 May	SWISS
25 Apr - 03 May	SWISS
25 Apr - 03 May	Bulgaria Air	direct

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 160€

Return flights