Take 15% off flights to/from Chicago O'Hare with the current promo offer from Frontier.

To apply discount, enter promo code WINCUP when booking.

Fares are valid for travel on Mondays through Thursdays, as well as Saturdays, from August 22 through October 20.

Tickets must be booked by 11:59pm ET, June 17.

Fares include:

Atlanta to Chicago $88 round-trip

Chicago to Miami $106 round-trip

Chicago to Orlando $140 round-trip

Chicago to Las Vegas $190 round-trip

Chicago to Phoenix $208 round-trip

Chicago to Los Angeles $182 round-trip

Chicago to Washington DC $106 round-trip

Chicago to Austin $106 round-trip

Chicago to Denver $88 round-trip

Chicago to Salt Lake City $178 round-trip

Chicago to San Francisco $182 round-trip

Chicago to Trenton $94 round-trip