Frontier Airlines (2nd) (Denver) has announced plans to add twice-weekly service between Miami International Airport (MIA) and Washington Dulles International Airport (IAD) beginning in December according to Miami International Airport. The new service announcement comes less than one month after the domestic low-cost carrier revealed that it would be launching 38 weekly departures from MIA to four additional domestic destinations.

The new nonstop Miami-Washington D.C. service is scheduled to begin on December 21, the same day that Frontier will launch nonstop flights from MIA to Chicago’s O’Hare International Airport. Flights to Washington Dulles will operate on Thursdays and Sundays, using the carrier’s 168-seat Airbus A320 aircraft (above). On December 20, Frontier will launch nonstop service from Miami to Denver, Philadelphia and New York’s LaGuardia Airport.

Previously in September, Frontier announced it was coming to Miami starting on December 20 with new routes operating to Chicago (O’Hare), Denver, New York (LaGuardia) and Philadelphia. Washington Dulles is a new addition to the original announcement.

Copyright Photo: Brian McDonough/AirlinersGallery.com. Airbus A320-214 N227FR (msn 6184) with Grizwald, the Bear, arrives in Washington (Reagan National) in the new 2014 livery.

Frontier Airlines (2nd):