Question : In the next four weeks, what day should you book your trip?
Answer : Since low prices are preferred, look at Mar 17th. As of Feb 20th, it's showing the cheapest ticket sales at $1,130. That is 5% below the average price for this route, so you can spend that extra money on an adventure rather than the flight.
Question : Is the price you found a good deal?
Answer : Prices for this trip tend to change a lot less than other flights from the United States. They can range from $979 to $1,385. Remember, you can save by booking further in advance.
Question : How many days should you spend in Copenhagen?
Answer : Travelers from BIL to CPH stay about one week on average.
Question : Would you be willing to change your travel days if it saved you money?
Answer : Friday is your cheapest day to fly in March. Being flexible with your travel days garners even more savings during booking.