IATADEN·ICAOKDEN·34airlines·265destinations·United States
Denver International Airport (DEN) currently has nonstop service to 265 destinations on 34 airlines in our latest departure data. The busiest route is to Seattle (SEA), served by 6 carriers, and the largest operator here is United Airlines with nonstops to 210 destinations. 35 of its routes are international.
Route data as of June 15, 2026, based on a 7-day departures sample.