Distance between cities › USA › Illinois › Orient, IL › Distance from Orient to Lamar Book Hotels

Distance from Orient, IL to Lamar, MO

Distance

401 mi

Time

7 hours 30 mins

Gas Cost

$37 - $73

There are 291.09 miles from Orient to Lamar in west direction and 401 miles (645.35 kilometers) by car, following the I-44 and US-50 route.

Orient and Lamar are 7 hours 30 mins far apart, if you drive non-stop .

This is the fastest route from Orient, IL to Lamar, MO.

Orient, IL and Lamar, MO are in the same time zone (CDT). Current time in both locations is 4:08 am.

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Lowest Price Rental Cars in Orient, IL

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

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Orient »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 16.12 gallons of gas to cover the route between Orient, IL and Lamar, MO.

The estimated cost of gas to go from Orient to Lamar is $52.59.

During the route, an average car will release 315.89 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 Orient, IL and Lamar, MO

If you want to meet halfway between Orient, IL and Lamar, MO or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 38.023589 and -91.559418, or 38º 1' 24.9204" N, 91º 33' 33.9048" W. This location is 200.74 miles away from Orient, IL and Lamar, MO and it would take approximately 3 hours 45 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Saint James, MO, situated 205 miles from Orient, IL and 198 miles from Lamar, MO. It would take 3 hours 52 mins to go from Orient to Saint James and 3 hours 40 mins to go from Lamar to Saint James.