Denver International Airport is 42 miles away from Boulder, served by 25 airlines and with approximately 160 daily non-stop flights from major U.S. cities. From the airport you can travel by bus or rent a car to get to Boulder.
Commute By Bus
You can take the Regional Transportation District (RTD) bus from DIA to Boulder (Route AB). The route makes several convenient stops in Boulder. Buses leave approximately every 60 minutes from the airport and drivers will help you load and unload your luggage. Stop closest to the CU Boulder Music Building is Broadway-Euclid
The schedule and route information can be found on RTD's website, www.rtd-denver.com (select Route AB/AB1/AB2). Riders must have exact change, purchase tickets with a major credit card at the ticket vending machine, or download the app and prepay. This is an economical option, with one-way tickets costing $10.50. RTD has an information booth on the baggage claim level of the Main Terminal. The trip takes approximately 80 minutes.
Download the app: https://www.rtd-denver.com/fares-passes/myride
Uber now has a partnership with RTD (which runs the public buses). You can use the Uber app to plan your route and pay for your bus fare. Just open your Uber app, choose your destination and starting location, and hit "Transit" among the product options.
Travel via Rental Car
Without Tolls: Take Peña Boulevard and merge onto I-70 west. Take I-70 to I-270 west. Continue onto Highway 36, which will take you to the east side of Boulder. This route is free of tolls and takes about 50 minutes during non-peak traffic hours.
With Tolls: (Fastest) From Peña Boulevard, take the toll road exit north (E-470 north to the Northwest Parkway toward Hwy. 36 West/Denver Boulder Turnpike). Exit onto Hwy. 36 and continue west into Boulder. Please be aware this route has tolls, and if you are renting a car, you will need to make arrangements with your rental car agency.