Allegiant Air will begin a huge expansion drive in 2025, with 44 new routes and three new cities being added to its network.

In 2025, Allegiant Airlines will offer routes at the Colorado Springs Airport as well as two new routes out of the Denver International Airport.

Allegiant is adding two new routes to Columbia Metropolitan Airport as a part of the airline's nationwide expansion. Here's when you can begin booking flights.

After an absence of more than six years, Las Vegas-based Allegiant Air is resuming service at Colorado Springs Airport with three new routes starting early next year.

As the Colorado Springs Airport continues to grow, a new airline has announced service to the city! Starting early next year, Allegiant Air is adding three new cities to its roster of nonstop routes: Colorado Springs;