From most locations, booking your flights to Cologne around 44 days prior to your departure date finds the best deals.
On average, the cheapest flights to Cologne are found when departing on a Monday. Try to avoid departing on a Tuesday, as this is usually the most expensive day.
In general, when looking for the cheapest flight to Cologne, our data indicates that morning flights are the most cost-effective. afternoon flights tend to be the most expensive.