Find great value on Frontier Airlines flights from FLL to DEN when you book with CheapOair! Surrounded by the beautiful Rocky Mountains, the city of Denver offers the perfect blend of adventure and arts. Adventure lovers should visit the Red Rocks Park which offers many exciting hiking trails. Chasing good times? Then fix a date with the Denver Center for the Performing Arts which hosts everything from Broadway musicals to theatre productions. Take your kids to the Denver Zoo which is spread across an area of more than 80 acres and is home to more than 4000 animals including rare and endangered wildlife.