AirHint found the following cheapest return flights from Cologne (CGN) to Sofia (SOF) in May 2026 (see full year).

Return flights

08 May - 10 May	Ryanair	direct
08 May - 17 May	Ryanair	direct
29 May - 05 Jun	Ryanair	direct
29 May - 19 Jun	Ryanair	direct
01 May - 17 May	Ryanair	direct
01 May - 08 May	Ryanair	direct
01 May - 10 May	Ryanair	direct
13 May - 17 May	Ryanair
07 May - 10 May	Pegasus Airlines
01 May - 05 May	Ryanair
01 May - 03 May	Ryanair	direct
29 May - 07 Jun	Ryanair	direct
04 May - 08 May	Pegasus Airlines

Also check the deals for one-way flights from Cologne to Sofia in May.

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 Cologne to Sofia in May from $147

Return flights