Flight
This will be the closest airport to fly into. Its about a 45 minute drive to Deadwood, 20 to Keystone and 30 to Hill City. Another option is to fly into Gillette, WY and enjoy a 1.5 hour drive to get to the black hills. If you choose to fly into Gillette, WY make sure when booking it is indeed flying into Gillette, it can and will auto direct you into Montana, and that is about a 4 hour drive.