Distance between cities › USA › Montana › Boulder, MT › Distance from Boulder to Ancona Book Hotels

Distance from Boulder, MT to Ancona, IL

Distance

1,448 mi

Time

1 day 1 hour

Gas Cost

$135 - $262

There are 1,211.59 miles from Boulder to Ancona in southeast direction and 1,448 miles (2,330.33 kilometers) by car, following the I-90 and US-14 and US-16 Truck and SD 79 route.

Boulder and Ancona are 1 day 1 hour far apart, if you drive non-stop .

This is the fastest route from Boulder, MT to Ancona, IL. The halfway point is Vivian, SD.

Please note the time difference between Boulder, MT and Ancona, IL is 1 hour. The current time in Boulder is 12:00 am and the current time in Ancona is 1:00 am.

Any questions or tips to share?

Share with fellow travellers any question or tips about the route from Boulder, MT to Ancona, IL:

Lowest Price Rental Cars in Boulder, MT

Planning on renting a car to go from Boulder, MT to Ancona, IL? Here there are some offers to rent a car in Boulder, MT

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Boulder »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 58.15 gallons of gas to cover the route between Boulder, MT and Ancona, IL.

The estimated cost of gas to go from Boulder to Ancona is $189.68.

During the route, an average car will release 1,139.22 pounds of CO₂ to the atmosphere. The carbon footprint would be 0.79 pounds of CO₂ per mile.

Average USA gas price used for calculation is $3.26 per gallon of regular gas. Price last updated on March 12, 2026.
Read more about our CO₂ calculation.

Halfway Point Between Boulder, MT and Ancona, IL

If you want to meet halfway between Boulder, MT and Ancona, IL or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 43.902084 and -100.413605, or 43º 54' 7.5024" N, 100º 24' 48.978" W. This location is 723.94 miles away from Boulder, MT and Ancona, IL and it would take approximately 12 hours 49 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Vivian, SD, situated 755 miles from Boulder, MT and 734 miles from Ancona, IL. It would take 11 hours 26 mins to go from Boulder to Vivian and 10 hours 53 mins to go from Ancona to Vivian.