Question : How long do most people visit Cologne?
Answer : Of course you're not most people, but if you were, you'd stay roughly 13 days.
Question : Should you take that vacation to Cologne in the next 30 days?
Answer : Since low prices are preferred, look at Jun 5th. As of May 29th, it's showing the cheapest ticket sales at $861. That is 42% below the average price for this route, so you can spend that extra cash on an adventure rather than the flight.
Question : Will you do what it takes to get the absolute cheapest flight?
Answer : In June, Monday is your cheapest day to fly. Flexibility is paramount when booking travel plans in order to keep travel costs down.
Question : Is the price you found a good deal?
Answer : Flight prices fluctuate less than most routes from the United States for BWI to CGN. They vary from $861 to $1,714. Remember, the sooner you book, the better price you tend to get.