Distance between cities › USA › Illinois › Royal, IL › Distance from Royal to Thayer Book Hotels

Distance from Royal, IL to Thayer, MO

Distance

408 mi

Time

8 hours 6 mins

Gas Cost

$38 - $74

There are 318.61 miles from Royal to Thayer in southwest direction and 408 miles (656.61 kilometers) by car, following the I-57 route.

Royal and Thayer are 8 hours 6 mins far apart, if you drive non-stop .

This is the fastest route from Royal, IL to Thayer, MO.

Royal, IL and Thayer, MO are in the same time zone (CDT). Current time in both locations is 8:46 pm.

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Lowest Price Rental Cars in Royal, IL

Planning on renting a car to go from Royal, IL to Thayer, MO? Here there are some offers to rent a car in Royal, IL

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Royal »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 16.38 gallons of gas to cover the route between Royal, IL and Thayer, MO.

The estimated cost of gas to go from Royal to Thayer is $53.44.

During the route, an average car will release 320.98 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 Royal, IL and Thayer, MO

If you want to meet halfway between Royal, IL and Thayer, MO or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 37.661035 and -88.972569, or 37º 39' 39.726" N, 88º 58' 21.2484" W. This location is 203.97 miles away from Royal, IL and Thayer, MO and it would take approximately 4 hours 3 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Marion, IL, situated 209 miles from Royal, IL and 202 miles from Thayer, MO. It would take 3 hours 52 mins to go from Royal to Marion and 4 hours 20 mins to go from Thayer to Marion.