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

Distance from Keyapaha, SD to Riley, OR

Distance

1,307 mi

Time

23 hours 52 mins

Gas Cost

$122 - $237

There are 971.65 miles from Keyapaha to Riley in west direction and 1,307 miles (2,103.41 kilometers) by car, following the I-80 and US-30 and WY 789 route.

Keyapaha and Riley are 23 hours 52 mins far apart, if you drive non-stop .

This is the fastest route from Keyapaha, SD to Riley, OR.

Please note the time difference between Keyapaha, SD and Riley, OR is 2 hours. The current time in Keyapaha is 5:13 pm and the current time in Riley is 3:13 pm.

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Lowest Price Rental Cars in Keyapaha, SD

Planning on renting a car to go from Keyapaha, SD to Riley, OR? 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 52.47 gallons of gas to cover the route between Keyapaha, SD and Riley, OR.

The estimated cost of gas to go from Keyapaha to Riley is $171.17.

During the route, an average car will release 1,028.06 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 Riley, OR

If you want to meet halfway between Keyapaha, SD and Riley, OR or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 41.419514 and -110.138166, or 41º 25' 10.2504" N, 110º 8' 17.3976" W. This location is 653.29 miles away from Keyapaha, SD and Riley, OR and it would take approximately 11 hours 56 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Lyman, WY, situated 652 miles from Keyapaha, SD and 658 miles from Riley, OR. It would take 12 hours 31 mins to go from Keyapaha to Lyman and 11 hours 31 mins to go from Riley to Lyman.