title: Denver Airport to Boulder: Bus, Shuttle or Drive
url: https://boardspy.site/blog/denver-airport-to-boulder/
type: Article
dateModified: 2026-08-16
publisher: BoardSpy
quick_answer: Quick answer: About 45 miles. Roughly an hour. And unusually for an American airport transfer, the bus is the right answer for most people — which is why almost every search on this corridor is about it.
primary_keyword: bus from denver airport to boulder
keywords[12]{term}:
  bus from denver airport to boulder
  bus from boulder to denver airport
  denver airport to boulder
  boulder to denver airport
  bus from denver international airport to boulder co
  denver airport to boulder co
  denver international to boulder
  boulder co to denver airport
  bus from denver international airport to boulder
  denver airport to boulder bus
  denver airport to boulder shuttle
  denver international airport to boulder co
faqs[5]{q,a}:
  How far is Denver Airport to Boulder?,About 45 miles. Driving is about 55 minutes clear and 1 hour 10 to 1 hour 30 with traffic. The RTD airport bus is about 60–75 minutes. Pattern estimates, not live times.
  Is the RTD bus better than a rideshare from DIA to Boulder?,For most people, yes. It is far cheaper and not meaningfully faster — you often pay several times the fare for maybe ten minutes. Exceptions: very late/early arrivals, groups of three or more, extra luggage or mobility needs.
  Should you take E-470 or drive through Denver?,E-470 is the tolled bypass that avoids Denver and is more predictable for a flight deadline. Through Denver is cheaper and hits metro congestion at peak. US 36 is the last approach into Boulder.
  Does the bus run early enough for a morning flight from Boulder?,Not always. Going to the airport has a deadline; leaving it does not. Check the first RTD trip before assuming it covers a very early departure.
  Should you rent a car if you are continuing to the mountains?,Usually yes. Boulder is walkable and transit-served; Estes Park, Rocky Mountain National Park and the ski corridor are not. Rent at DIA if Boulder is only a waypoint.
citations[2]{name,url}:
  RTD airport buses,https://www.rtd-denver.com/services/airport
  BoardSpy data sources,https://boardspy.site/facts/data-sources/
internal_links[3]{label,url}:
  Best time to leave in Denver,https://boardspy.site/blog/best-time-to-leave-denver-avoid-traffic/
  How to get from LAX to Union Station,https://boardspy.site/blog/how-to-get-from-lax-to-union-station/
  Boston to Providence train or Logan,https://boardspy.site/blog/boston-to-providence-train-drive-or-airport/