Summary TUS facilitates strong regional and national connectivity, with its top five busiest routes offering over 100 monthly flights each. TUS has experienced significant growth in passenger numbers, rising 12% over six months and exceeding pre-pandemic levels in 2023. Notable developments include the resumption of Frontier Airlines service in March 2025 and American Airlines testing new boarding systems at TUS.
Tucson International Airport (TUS), a gateway for southern Arizona, serves multiple high-frequency routes connecting passengers to major hubs and leisure destinations. According to Cirium ’s December 2024 data, the airport's top five busiest routes boast over 100 frequencies each, highlighting the demand for air travel in the region. Let's take a closer look at these leading routes and their significance in Tucson's connectivity.
5 Tucson - Denver The route from Tucson to Denver (DEN) offered by Southwest Airlines , holds the fifth position in this ranking. With 107 flights and 17,189 available seats each month, Denver International Airport serves as an important hub for customers connecting to the Rocky Mountain area and beyond. Flights per month Seats ASMs 107 17,189 10,983,771 Recently, a Southwest Boeing 737-700 at Denver International Airport was evacuated using slides after a passenger’s phone battery caught fire, igniting a seat.
The incident caused one minor injury and left the phone owner with burns. The FAA is investigating, and the flight departed thre.