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

Distance from Grass Range, MT to Saint Thomas, MO

Distance

1,286 mi

Time

22 hours 55 mins

Gas Cost

$120 - $233

There are 1,029.70 miles from Grass Range to Saint Thomas in southeast direction and 1,286 miles (2,069.62 kilometers) by car, following the I-29 route.

Grass Range and Saint Thomas are 22 hours 55 mins far apart, if you drive non-stop .

This is the fastest route from Grass Range, MT to Saint Thomas, MO.

Please note the time difference between Grass Range, MT and Saint Thomas, MO is 1 hour. The current time in Grass Range is 1:53 am and the current time in Saint Thomas is 2:53 am.

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Lowest Price Rental Cars in Grass Range, MT

Planning on renting a car to go from Grass Range, MT to Saint Thomas, MO? 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 51.66 gallons of gas to cover the route between Grass Range, MT and Saint Thomas, MO.

The estimated cost of gas to go from Grass Range to Saint Thomas is $168.52.

During the route, an average car will release 1,012.15 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 Saint Thomas, MO

If you want to meet halfway between Grass Range, MT and Saint Thomas, MO or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 43.779174 and -99.330376, or 43º 46' 45.0264" N, 99º 19' 49.3536" W. This location is 643.18 miles away from Grass Range, MT and Saint Thomas, MO and it would take approximately 11 hours 27 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Chamberlain, SD, situated 612 miles from Grass Range, MT and 676 miles from Saint Thomas, MO. It would take 11 hours 2 mins to go from Grass Range to Chamberlain and 12 hours 2 mins to go from Saint Thomas to Chamberlain.