Distance between cities › USA › Montana › Florence, MT › Distance from Florence to Keystone Book Hotels

Distance from Florence, MT to Keystone, SD

Distance

700 mi

Time

12 hours 22 mins

Gas Cost

$65 - $127

There are 551.31 miles from Florence to Keystone in southeast direction and 700 miles (1,126.54 kilometers) by car, following the I-90 and US-191 route.

Florence and Keystone are 12 hours 22 mins far apart, if you drive non-stop .

This is the fastest route from Florence, MT to Keystone, SD.

Florence, MT and Keystone, SD are in the same time zone (MDT). Current time in both locations is 1:57 pm.

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Lowest Price Rental Cars in Florence, MT

Planning on renting a car to go from Florence, MT to Keystone, SD? Here there are some offers to rent a car in Florence, MT

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Florence »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 28.12 gallons of gas to cover the route between Florence, MT and Keystone, SD.

The estimated cost of gas to go from Florence to Keystone is $91.73.

During the route, an average car will release 550.95 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 Florence, MT and Keystone, SD

If you want to meet halfway between Florence, MT and Keystone, SD or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 45.679509 and -108.716213, or 45º 40' 46.2324" N, 108º 42' 58.3668" W. This location is 350.11 miles away from Florence, MT and Keystone, SD and it would take approximately 6 hours 11 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Laurel, MT, situated 348 miles from Florence, MT and 354 miles from Keystone, SD. It would take 5 hours 46 mins to go from Florence to Laurel and 6 hours 39 mins to go from Keystone to Laurel.

Major City Closest to Halfway Point

The major city closest to the halfway point between Florence, MT and Keystone, SD is Billings, MT, situated 364 miles from Florence, MT and 337 miles from Keystone, SD. It would take 6 hours 6 mins to go from Florence to Billings and 6 hours 20 mins to go from Keystone to Billings.