For the cheapest flights to Warsaw book 59 days before departure.
The most popular airlines on the route Cologne - Warsaw: Ryanair (FR), Lufthansa (LH), Air Berlin (AB).
The cheapest flights are on the route Cologne - Bonn Airport (CGN) - Modlin (WMI).
Direct flights last about 1h 45min.
Direct flights available 5 days a week - Monday, Wednesday, Thursday, Friday, Sunday.
Direct flights: Ryanair (FR).