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

Return flights

28 Sep - 15 Oct	Ryanair	direct
28 Sep - 08 Oct	Ryanair	direct
28 Sep - 01 Oct	Ryanair
28 Sep - 05 Oct	Ryanair	direct
17 Sep - 05 Oct	Ryanair	direct
07 Sep - 05 Oct	Ryanair
28 Sep - 12 Oct	Ryanair	direct
17 Sep - 21 Sep	Ryanair
07 Sep - 14 Sep	Ryanair
02 Sep - 06 Sep	Ryanair
08 Sep - 12 Sep	Ryanair
28 Sep - 01 Oct	Ryanair	direct
03 Sep - 07 Sep	Ryanair
07 Sep - 05 Oct	Ryanair	direct
01 Sep - 06 Sep	Ryanair
17 Sep - 01 Oct	Ryanair	direct
17 Sep - 28 Sep	Ryanair	direct
01 Sep - 05 Sep	Ryanair
09 Sep - 13 Sep	Ryanair
17 Sep - 24 Sep	Ryanair	direct

Also check the deals for one-way flights from Liverpool 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 Liverpool to Sofia in September from $144

Return flights