Distance between cities › USA › Texas › Richardson, TX › Distance from Richardson to Lamar Book Hotels

Distance from Richardson, TX to Lamar, MO

Distance

375 mi

Time

7 hours 5 mins

Gas Cost

$35 - $68

There are 343.27 miles from Richardson to Lamar in northeast direction and 375 miles (603.50 kilometers) by car, following the US-69 route.

Richardson and Lamar are 7 hours 5 mins far apart, if you drive non-stop .

This is the fastest route from Richardson, TX to Lamar, MO. The halfway point is Eufaula, OK.

Richardson, TX and Lamar, MO are in the same time zone (CDT). Current time in both locations is 1:14 pm.

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Lowest Price Rental Cars in Richardson, TX

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

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Richardson »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 15.08 gallons of gas to cover the route between Richardson, TX and Lamar, MO.

The estimated cost of gas to go from Richardson to Lamar is $49.19.

During the route, an average car will release 295.45 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 Richardson, TX and Lamar, MO

If you want to meet halfway between Richardson, TX 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 35.319748 and -95.564369, or 35º 19' 11.0928" N, 95º 33' 51.7284" W. This location is 187.75 miles away from Richardson, TX and Lamar, MO and it would take approximately 3 hours 32 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Eufaula, OK, situated 188 miles from Richardson, TX and 191 miles from Lamar, MO. It would take 3 hours 10 mins to go from Richardson to Eufaula and 3 hours 2 mins to go from Lamar to Eufaula.