Distance between cities › USA › Illinois › Mason, IL › Distance from Mason to Mill Spring Book Hotels

Distance from Mason, IL to Mill Spring, MO

Distance

243 mi

Time

4 hours 53 mins

Gas Cost

$23 - $44

There are 172.19 miles from Mason to Mill Spring in southwest direction and 243 miles (391.07 kilometers) by car, following the US-67 route.

Mason and Mill Spring are 4 hours 53 mins far apart, if you drive non-stop .

This is the fastest route from Mason, IL to Mill Spring, MO.

Mason, IL and Mill Spring, MO are in the same time zone (CDT). Current time in both locations is 2:59 am.

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Lowest Price Rental Cars in Mason, IL

Planning on renting a car to go from Mason, IL to Mill Spring, MO? Here there are some offers to rent a car in Mason, IL

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Mason »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 9.75 gallons of gas to cover the route between Mason, IL and Mill Spring, MO.

The estimated cost of gas to go from Mason to Mill Spring is $32.08.

During the route, an average car will release 190.99 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 $3.29 per gallon of regular gas. Price last updated on March 13, 2026.
Read more about our CO₂ calculation.

Halfway Point Between Mason, IL and Mill Spring, MO

If you want to meet halfway between Mason, IL and Mill Spring, MO or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 38.516011 and -90.334547, or 38º 30' 57.6396" N, 90º 20' 4.3692" W. This location is 121.36 miles away from Mason, IL and Mill Spring, MO and it would take approximately 2 hours 26 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Affton, MO, situated 114 miles from Mason, IL and 132 miles from Mill Spring, MO. It would take 2 hours 19 mins to go from Mason to Affton and 2 hours 43 mins to go from Mill Spring to Affton.

Major City Closest to Halfway Point

The major city closest to the halfway point between Mason, IL and Mill Spring, MO is Saint Louis, MO, situated 104 miles from Mason, IL and 140 miles from Mill Spring, MO. It would take 2 hours 5 mins to go from Mason to Saint Louis and 2 hours 54 mins to go from Mill Spring to Saint Louis.