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

Distance from Mason, IL to Arnold, MO

Distance

122 mi

Time

2 hours 27 mins

Gas Cost

$11 - $22

There are 101.18 miles from Mason to Arnold in southwest direction and 122 miles (196.34 kilometers) by car, following the I-57 route.

Mason and Arnold are 2 hours 27 mins far apart, if you drive non-stop .

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

Mason, IL and Arnold, MO are in the same time zone (CDT). Current time in both locations is 9:19 pm.

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Lowest Price Rental Cars in Mason, IL

Planning on renting a car to go from Mason, IL to Arnold, 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 4.88 gallons of gas to cover the route between Mason, IL and Arnold, MO.

The estimated cost of gas to go from Mason to Arnold is $15.92.

During the route, an average car will release 95.64 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 Mason, IL and Arnold, MO

If you want to meet halfway between Mason, IL and Arnold, MO or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 38.622324 and -89.482961, or 38º 37' 20.3664" N, 89º 28' 58.6596" W. This location is 60.78 miles away from Mason, IL and Arnold, MO and it would take approximately 1 hour 13 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Breese, IL, situated 65 miles from Mason, IL and 58 miles from Arnold, MO. It would take 1 hour 17 mins to go from Mason to Breese and 1 hour 14 mins to go from Arnold to Breese.