Which air-line flies through Fort  Collins - Loveland Municipal Airport and employees 3,700 employees? 
Fort Collins–Loveland Municipal Airport: Northern Colorado Regional Airport (IATA: FNL, ICAO: KFNL, FAA LID: FNL) is a public use airport located nine nautical miles (10 mi, 17 km) southeast of the central business district of Fort Collins and northeast of Loveland, both cities in Larimer County, Colorado, United States. Fort Collins–Loveland Municipal Airport:  It is mostly used for general aviation; scheduled passenger jet service operated by Allegiant Air nonstop to Las Vegas was discontinued in October 2012.
i don't know