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

Distance from Roberts, MT to Union, ND

Distance

718 mi

Time

12 hours 34 mins

Gas Cost

$67 - $130

There are 572.66 miles from Roberts to Union in northeast direction and 718 miles (1,155.51 kilometers) by car, following the I-94 route.

Roberts and Union are 12 hours 34 mins far apart, if you drive non-stop .

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

Please note the time difference between Roberts, MT and Union, ND is 1 hour. The current time in Roberts is 10:44 am and the current time in Union is 11:44 am.

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Lowest Price Rental Cars in Roberts, MT

Planning on renting a car to go from Roberts, MT to Union, ND? 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 28.84 gallons of gas to cover the route between Roberts, MT and Union, ND.

The estimated cost of gas to go from Roberts to Union is $94.09.

During the route, an average car will release 565.11 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, ND

If you want to meet halfway between Roberts, MT and Union, ND or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 46.89067 and -102.964852, or 46º 53' 26.412" N, 102º 57' 53.4672" W. This location is 359.11 miles away from Roberts, MT and Union, ND and it would take approximately 6 hours 17 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is South Heart, ND, situated 355 miles from Roberts, MT and 367 miles from Union, ND. It would take 6 hours 8 mins to go from Roberts to South Heart and 6 hours 35 mins to go from Union to South Heart.