Question : Interested in traveling in the next 30 days and want to get the lowest fare?
Answer : Since low prices are preferred, look at Mar 17th. As of Feb 20th, it's showing the cheapest ticket sales at $747. That is 10% below the average price for this route, so you can spend that extra cash on an adventure rather than the flight.
Question : Are you paying the cheapest or highest price for your ticket to Cologne?
Answer : Flight prices are fluctuating a lot more for this route than the majority of routes from the United States, as they're ranging anywhere from $733 to $3,007. However, the sooner you book, the better price you tend to get.
Question : How long do most people stay in Cologne?
Answer : Of course you're not most people, but if you were, you'd stay roughly six days.
Question : Would you be willing to change your travel days if it saved you money?
Answer : The lowest-cost day to fly in March is Saturday. Flexibility is paramount when booking travel plans in order to keep travel costs down.