The cheapest flight to Dublin you can get by boooking 8 days before departure.
The most popular airlines on the route Cologne - Dublin: Ryanair (FR), Germanwings (4U), Lufthansa (LH).
The cheapest flights you can book on the route Cologne - Bonn Airport (CGN) - Dublin Airport (DUB).
Direct flights last about 1h 55min.
Direct flights available 7 days a week.
Direct flights: Ryanair (FR), Germanwings (4U).