Question : Would you be willing to change your travel days if it saved you money?
Answer : For the month of July, the cheapest day to fly is Friday. Being flexible with your travel days garners even more savings during booking.
Question : Is Cologne Bonn Airport (CGN) the cheapest airport for getting to Boryspil International Airport (KBP)?
Answer : Departing from Cologne Bonn Airport is not the only way to get to Boryspil International Airport. Try searching for flights from Dusseldorf International Airport (DUS) as well. Over the next few months, flights from DUS to KBP are being priced 33% cheaper than flights from CGN to KBP. Being only 32 miles away, it's easily accessible for most.
Question : How many days should you spend in Kiev?
Answer : Over the next two months, travelers from CGN to KBP are planning on staying for about one week on average.