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

Return flights

17 Sep - 20 Sep	Ryanair
28 Sep - 30 Sep	Ryanair
13 Sep - 16 Sep	Ryanair
30 Sep - 02 Oct	Ryanair
14 Sep - 17 Sep	Ryanair
29 Sep - 01 Oct	Ryanair
28 Sep - 02 Oct	Ryanair
02 Sep - 06 Sep	Ryanair
23 Sep - 30 Sep	Ryanair
16 Sep - 19 Sep	Ryanair
15 Sep - 18 Sep	Ryanair
18 Sep - 21 Sep	Ryanair

Also check the deals for one-way flights from Leeds 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 Leeds to Sofia in September from $212

Return flights