Explore 4 ways to travel

Select an option below to see step-by-step directions and to compare ticket prices and travel times in Rome2rio's travel planner.

Recommended option

Fly from Chicago Midway, bus  •  5 h 38 min

  1. MDW - DEN

$101 - $333

Cheapest option

Fly from Chicago O'Hare, bus  •  5 h 57 min

  1. ORD - DEN

$51 - $234

4 alternative options

Train to Milwaukee, fly, bus  •  7 h 23 min

  1. MKE - DEN

$129 - $513

Train  •  19 h 5 min

  1. California Zephyr

$141 - $399

Bus  •  28 h 21 min

  1. 1351 / ...
  2. 1401

$142 - $229

Drive  •  15 h 53 min

  1. 1023.4 miles

$100 - $150

What companies run services between Chicago, IL, USA and Boulder, CO, USA?

Amtrak operates a train from Chicago to Boulder once daily. Tickets cost $130 - $400 and the journey takes 18 h 15 min. Alternatively, you can take a bus from Chicago to Boulder via Champaign, Il, Champaign, IL, Denver, CO, and 18th St & California St in around 28 h 21 min.

Airlines
Southwest Airlines
Website
southwest.com
Flights from Chicago Midway to Denver
Ave. Duration
2 h 35 min
When
Every day
Estimated price
$110 - $550
Flights from Milwaukee to Denver
Ave. Duration
2 h 35 min
When
Every day
Estimated price
$200 - $850
Flights from Milwaukee to Denver via Kansas City
Ave. Duration
4 h 20 min
When
Monday, Tuesday, Wednesday, Thursday, Friday and Sunday
Estimated price
$200 - $850
United Airlines
Website
united.com
Flights from Chicago O'Hare to Denver
Ave. Duration
2 h 40 min
When
Every day
Estimated price
$150 - $700
Flights from Milwaukee to Denver
Ave. Duration
2 h 43 min
When
Every day
Estimated price
$220 - $800
Flights from Milwaukee to Denver via Chicago O'Hare
Ave. Duration
4 h 31 min
When
Every day
Estimated price
$220 - $800
American Airlines
Website
aa.com
Flights from Chicago O'Hare to Denver
Ave. Duration
2 h 37 min
When
Every day
Estimated price
$100 - $650
Flights from Milwaukee to Denver via Chicago O'Hare
Ave. Duration
4 h 34 min
When
Monday, Tuesday, Thursday, Friday, Saturday and Sunday
Estimated price
$230 - $850
Spirit Airlines
Website
spirit.com
Flights from Chicago O'Hare to Denver
Ave. Duration
2 h 40 min
When
Every day
Estimated price
$40 - $370
Frontier Airlines
Website
flyfrontier.com
Flights from Chicago O'Hare to Denver
Ave. Duration
2 h 48 min
When
Every day
Estimated price
$85 - $400
Flights from Milwaukee to Denver
Ave. Duration
2 h 40 min
When
Every day
Estimated price
$140 - $490
Train operators
Amtrak
Phone
+1 1-800-872-7245
Website
amtrak.com
Train from Chicago Union Station Amtrak to Milwaukee Intermodal Station Amtrak
Ave. Duration
1 h 29 min
Frequency
Hourly
Estimated price
$28 - $60
Website
amtrak.com
Coach Seat
$28 - $45
Flexi Coach Seat
$50 - $75
Business Coach Seat
$40 - $60
Room
$150 - $210
Train from Chicago Union Station Amtrak to Denver Union Station Amtrak
Ave. Duration
18 h 15 min
Frequency
Once daily
Estimated price
$130 - $400
Website
amtrak.com
Coach Seat
$130 - $200
Flexi Coach Seat
$240 - $350
Business Coach Seat
$280 - $400
Room
$500 - $750
Bus operators
Regional Transportation District
Website
rtd-denver.com
Bus from Denver Airport Station Gate 8 to Downtown Boulder Station
Ave. Duration
1 h 8 min
Frequency
Hourly
Estimated price
$9
Schedules at
rtd-denver.com
Greyhound USA
Phone
+1 214-849-8100
Email
ifsr@greyhound.com
Website
greyhound.com
Bus from Chicago, Il to Champaign, Il
Ave. Duration
2 h 30 min
Frequency
Every 30 minutes
Estimated price
$19 - $45
Website
greyhound.com
Economy
$19 - $29
Flexible
$30 - $45
Burlington Trailways

Want to know more about travelling around United States

Rome2rio's Travel Guide series provide vital information for the global traveller. Filled with useful and timely travel information, the guides answer all the hard questions - such as 'How do I buy a ticket?', 'Should I book online before I travel? ', 'How much should I expect to pay?', 'Do the trains and buses have Wifi?' - to help you get the most out of your next trip.

Questions & Answers

The distance between Chicago and Boulder is 1493 km. The road distance is 1637 km.

The cheapest way to get from Chicago to Boulder is to fly and bus which costs $50 - $240 and takes 5 h 57 min.

The quickest way to get from Chicago to Boulder is to fly and bus which takes 5 h 38 min and costs $100 - $340.

No, there is no direct bus from Chicago to Boulder. However, there are services departing from Chicago, Il and arriving at 28th St & College Ave via Champaign, IL and 18th St & California St. The journey, including transfers, takes approximately 28 h 21 min.

It takes approximately 5 h 38 min to get from Chicago to Boulder, including transfers.