The destination of Thornton is a great choice if you’ve been thinking about a vacation with your kids. The recreation options, mountain views, and hiking trails are just a few things that make this an attractive place for a family vacation. Take to the air and fly into Broomfield, CO (BJC-Rocky Mountain Metropolitan), which is the closest airport, or Denver Intl. Airport (DEN), which is located 15.9 mi (25.6 km) from the city center.