The cheapest flight to Varna you can get by boooking 5 days before departure.
The most popular airlines on the route Cologne - Varna: Turkish Airlines (TK), SunExpress Germany (XG), Germanwings (4U).
The cheapest flights you can book on the route Cologne - Bonn Airport (CGN) - Varna Airport (VAR).
Direct flights last about 2h 35min.
Direct flights available 3 days a week - Tuesday, Thursday, Sunday.
Direct flights: SunExpress Germany (XG), Germanwings (4U).