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

Return flights

29 Sep - 28 Oct	Ryanair	direct
29 Sep - 16 Oct	Ryanair	direct
22 Sep - 09 Oct	Ryanair	direct
25 Sep - 16 Oct	Ryanair	direct
30 Sep - 04 Oct	Ryanair
18 Sep - 09 Oct	Ryanair	direct
29 Sep - 09 Oct	Ryanair	direct
22 Sep - 02 Oct	Ryanair	direct
22 Sep - 13 Oct	Ryanair	direct
29 Sep - 02 Oct	easyJet
14 Sep - 17 Sep	Ryanair
22 Sep - 25 Sep	Ryanair
22 Sep - 25 Sep	Ryanair	direct
15 Sep - 18 Sep	easyJet
18 Sep - 25 Sep	Ryanair	direct
15 Sep - 22 Sep	Ryanair
08 Sep - 25 Sep	Ryanair	direct
11 Sep - 25 Sep	Ryanair	direct
11 Sep - 18 Sep	Ryanair
18 Sep - 22 Sep	Ryanair

Also check the deals for one-way flights from Birmingham 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 Birmingham to Sofia in September from 87€

Return flights