Low-cost airline Frontier Airlines will add 21 destinations and 85 routes to its lineup, the company announced Tuesday. >> Read more trending news The airline plans to grow to a total of 82 cities total with more than 1,000 routes by next summer, according to a news release. That’s more than double the current number of total routes offered by the airline. >> Related: Pilot 'congratulates' passengers for drinking all alcohol on plane The airline also plans to add more planes to its fleet, growing from 63 to 76 jets by the end of 2018, according to USA Today. “Customers will benefit not only from the broad new selection of nonstop routes, but our growing network will provide more than 1,000 new connecting route options,” Frontier CEO Barry Biffle said in a statement. “By taking advantage of our natural share of connecting passengers, we can offer our low fares to even more of America.” >> Related: American Airlines to decrease legroom for passengers To celebrate the announcement, the airline is offering limited-time one-way fares as low as $39. Among the 21 cities that the airline will service, 18 are destinations the carrier previously serviced. >> Related: Low-cost airline considers replacing seats with standing space Buffalo, New York; Charleston, South Carolina; and Pensacola, Florida, are the new cities added to the airline’s route map. The 18 cities it will restore service to include the following: Albuquerque, New Mexico Boise, Idaho Calgary, Alberta, Canada El Paso, Texas Fargo, North Dakota Fresno, California Grand Rapids, Michigan Jackson Hole, Wyoming Jacksonville, Florida Little Rock, Arkansas Louisville, Kentucky Oklahoma City, Oklahoma Ontario, California Palm Springs, California Reno, Nevada San Jose, California Spokane, Washington Tulsa, Oklahoma At least 20 new destinations are being added to Frontier’s Denver flight schedule, “suggesting that it's looking to funnel more connecting passengers through the airport,” USA Today reported. Frontier Airlines’ largest hub is in Denver. >> Related: Baby born on flight gets free plane tickets for life It’s unclear when exactly the airline will begin offering many of the new routes between cities. Frontier said it planned to add all newly announced routes by Spring 2018 but did not provide specific dates. Read more at Frontier.