Distance between cities › USA › South Dakota › Keyapaha, SD › Distance from Keyapaha to Lamar Book Hotels

Distance from Keyapaha, SD to Lamar, AR

Distance

848 mi

Time

15 hours 49 mins

Gas Cost

$79 - $154

There are 640.67 miles from Keyapaha to Lamar in southeast direction and 848 miles (1,364.72 kilometers) by car, following the US-81 route.

Keyapaha and Lamar are 15 hours 49 mins far apart, if you drive non-stop .

This is the fastest route from Keyapaha, SD to Lamar, AR.

Keyapaha, SD and Lamar, AR are in the same time zone (CDT). Current time in both locations is 2:40 pm.

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Lowest Price Rental Cars in Keyapaha, SD

Planning on renting a car to go from Keyapaha, SD to Lamar, AR? Here there are some offers to rent a car in Keyapaha, SD

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Keyapaha »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 34.05 gallons of gas to cover the route between Keyapaha, SD and Lamar, AR.

The estimated cost of gas to go from Keyapaha to Lamar is $111.06.

During the route, an average car will release 667.03 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 Keyapaha, SD and Lamar, AR

If you want to meet halfway between Keyapaha, SD and Lamar, AR or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 38.510097 and -97.621008, or 38º 30' 36.3492" N, 97º 37' 15.6288" W. This location is 423.87 miles away from Keyapaha, SD and Lamar, AR and it would take approximately 7 hours 54 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Lindsborg, KS, situated 425 miles from Keyapaha, SD and 427 miles from Lamar, AR. It would take 8 hours 34 mins to go from Keyapaha to Lindsborg and 7 hours 25 mins to go from Lamar to Lindsborg.