Cheapest return flights from Cologne to Sofia in September from $135

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

Return flights

30 Sep - 18 Oct Ryanair direct
30 Sep - 21 Oct Ryanair direct
02 Sep - 11 Sep Ryanair direct
06 Sep - 11 Sep Ryanair direct
11 Sep - 16 Sep Ryanair
02 Sep - 04 Sep Ryanair direct
13 Sep - 16 Sep Ryanair
11 Sep - 13 Sep Ryanair
30 Sep - 04 Oct Ryanair direct
11 Sep - 02 Oct Ryanair direct
30 Sep - 02 Oct Ryanair direct
11 Sep - 13 Sep Ryanair direct
02 Sep - 13 Sep Ryanair direct
13 Sep - 04 Oct Ryanair direct
13 Sep - 02 Oct Ryanair direct
02 Sep - 16 Sep Ryanair direct
06 Sep - 13 Sep Ryanair direct
28 Sep - 02 Oct Lufthansa

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

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