Question : Do prices fluctuate more for this route than others?
Answer : Ranging anywhere from $200 to $624, prices for LUX to CGN do change much more than most routes from Luxembourg. However, the sooner you book, the better price you tend to get.
Question : Who's offering the cheapest round-trip flight to Cologne Bonn Airport (CGN) over the coming months?
Answer : Lufthansa is your best bet for finding that coveted low fare. They're offering fares as low as $200, while prices for other flights are as high as $624.
Question : How long do most people visit Cologne?
Answer : Of course you're not most people, but if you were, you'd stay roughly two days.
Question : Would you be willing to change your travel days if it saved you money?
Answer : Friday is your cheapest day to fly in the month of March. Having flexibility in your travel plans means you can save more, so be sure to plan ahead when possible.