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

Distance from Grass Range, MT to Union, IA

Distance

1,015 mi

Time

18 hours 18 mins

Gas Cost

$95 - $184

There are 839.51 miles from Grass Range to Union in southeast direction and 1,015 miles (1,633.48 kilometers) by car, following the I-90 and US-14 and US-16 Truck and SD 79 route.

Grass Range and Union are 18 hours 18 mins far apart, if you drive non-stop .

This is the fastest route from Grass Range, MT to Union, IA.

Please note the time difference between Grass Range, MT and Union, IA is 1 hour. The current time in Grass Range is 3:36 am and the current time in Union is 4:36 am.

Any questions or tips to share?

Share with fellow travellers any question or tips about the route from Grass Range, MT to Union, IA:

Lowest Price Rental Cars in Grass Range, MT

Planning on renting a car to go from Grass Range, MT to Union, IA? Here there are some offers to rent a car in Grass Range, MT

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Grass Range »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 40.78 gallons of gas to cover the route between Grass Range, MT and Union, IA.

The estimated cost of gas to go from Grass Range to Union is $133.03.

During the route, an average car will release 799.02 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 Grass Range, MT and Union, IA

If you want to meet halfway between Grass Range, MT and Union, IA or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 43.842582 and -101.244261, or 43º 50' 33.2952" N, 101º 14' 39.3396" W. This location is 507.75 miles away from Grass Range, MT and Union, IA and it would take approximately 9 hours 9 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Belvidere, SD, situated 512 miles from Grass Range, MT and 505 miles from Union, IA. It would take 9 hours 25 mins to go from Grass Range to Belvidere and 8 hours 56 mins to go from Union to Belvidere.