Thursday, June 14, 2018 
5.1 million passengers passed through Denver International Airport (DEN) in April 2018, a 5.9 percent increase over April 2017.
This is the first time in Denver aviation history that traffic surpassed 5 million passengers in the month of April, and marks the seventh-consecutive month of record-breaking traffic at DEN.
DEN’s airline partners added seven new routes in April, including nonstop service on Frontier Airlines to Buffalo, New York (BUF). Prior to Frontier’s inauguration of service, Buffalo had ranked as Denver’s largest domestic market without nonstop service.
“As we enter the summer travel season, we anticipate strong passenger traffic growth, likely exceeding our record-breaking season last year,” said Kim Day, DEN CEO. “Those who plan to travel this summer are encouraged to come out to the airport early and instead of feeling rushed, start vacation early by enjoying one of our great restaurants, shops or just relax and enjoy the sun on our outdoor plaza.”
Mail, freight and express cargo operations decreased 2.3 percent in April with 45,794,023 pounds, compared to 46,881,507 pounds of cargo in April 2017.
Source:- Denver International Airport