Frontier Airlines will launch service from Miami to Denver, New York LaGuardia and Philadelphia on Dec. 20, and to Chicago O'Hare on Dec. 21.
The schedule calls for daily service to Denver plus twice a day on Mondays, Wednesdays and Fridays; twice daily to LaGuardia; and daily to Philadelphia and Chicago.
Introductory one-way fares from $59 to $99 are available for purchase by Oct. 6 for travel from Jan. 5 through April 29. Blackout dates apply.
Frontier currently flies from Fort Lauderdale to Cincinnati; Cleveland; St. Louis; Trenton, N.J.; and Washington Dulles.