Frontier Airlines has extended seasonal flights from Denver to Eugene in Oregon, Greensboro in North Carolina and Knoxville, Tennessee
On 3 June, the carrier announced that the flights, which had been scheduled to end in the fall, would continue through early January.
The Denver-based airline tells Flightglobal it will convert the flights into year-round service if bookings are strong during the holidays and the typically slower winter travel months.
Frontier began seasonal flying three times weekly to Greensboro's Piedmont Triad International airport on 1 May and three times weekly to Eugene airport on 16 May, according to the airline. The service to Knoxville's McGhee Tyson airport, which also operates three times weekly, began on 17 May.
The flights to Greensboro were scheduled to discontinue in early September and the Eugene and Knoxville flights were to end in late October, the airline says.
From 25 October until 5 January, the carrier will operate two weekly flights each to Eugene and Knoxville. It will fly twice weekly from Denver to Greensboro from 12 September to 3 January.
United Airlines flies once daily from Denver to Knoxville and between one and three times per day to Eugene. Frontier does not have any competition on the Denver-Greensboro flight, according to FlightMaps Analytics.
Frontier also announced 3 June it will resume a number of services for the winter season. Among those are flights from Denver to Palm Springs in California, Cozumel in Mexico and San Jose in Costa Rica.
The airline will also resume service to Orlando from Bloomington in Illinois, Madison in Wisconsin and Omaha in Nebraska.
Other seasonal services include flights to Cancun from Indianapolis in Indiana, Milwaukee in Wisconsin, Kansas City in Missouri and Salt Lake City in Utah.
Additionally, the carrier will resume flights from Kansas City to Los Cabos and Puerta Vallarta in Mexico.