 Central Illinois Regional Airport and Frontier Airlines offer seasonal nonstop service to Denver starting April 25th. Whether it's family in Denver, a concert at Red Rocks, or a hiking trip, fly BMI to mile high. Try Frontier's low fares done right or the Go Wild Summer Pass for $3.99 with unlimited flights from Bloomington through September. Visit CIRA.com slash Frontier. That's C-I-R-A dot com to book your nonstop to Denver summer adventure on Frontier. Close. Convenient. CIRA.