Distance between cities › USA › Montana › Roberts, MT › Distance from Roberts to Union Book Hotels

Distance from Roberts, MT to Union, IL

Distance

1,223 mi

Time

21 hours 29 mins

Gas Cost

$114 - $222

There are 1,047.99 miles from Roberts to Union in east direction and 1,223 miles (1,968.23 kilometers) by car, following the I-90 and US-14 and US-16 Truck and SD 79 route.

Roberts and Union are 21 hours 29 mins far apart, if you drive non-stop .

This is the fastest route from Roberts, MT to Union, IL.

Please note the time difference between Roberts, MT and Union, IL is 1 hour. The current time in Roberts is 4:20 am and the current time in Union is 5:20 am.

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Lowest Price Rental Cars in Roberts, MT

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

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Roberts »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 49.10 gallons of gas to cover the route between Roberts, MT and Union, IL.

The estimated cost of gas to go from Roberts to Union is $160.16.

During the route, an average car will release 961.93 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 Roberts, MT and Union, IL

If you want to meet halfway between Roberts, MT and Union, IL or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 43.708569 and -98.629567, or 43º 42' 30.8484" N, 98º 37' 46.4412" W. This location is 611.27 miles away from Roberts, MT and Union, IL and it would take approximately 10 hours 44 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is White Lake, SD, situated 602 miles from Roberts, MT and 623 miles from Union, IL. It would take 10 hours 33 mins to go from Roberts to White Lake and 11 hours 1 min to go from Union to White Lake.