Distance between cities › USA › South Dakota › Box Elder, SD › Distance from Box Elder to Roy Book Hotels

Distance from Box Elder, SD to Roy, WA

Distance

1,175 mi

Time

21 hours 3 mins

Gas Cost

$110 - $213

There are 960.30 miles from Box Elder to Roy in west direction and 1,175 miles (1,890.98 kilometers) by car, following the I-90 route.

Box Elder and Roy are 21 hours 3 mins far apart, if you drive non-stop .

This is the fastest route from Box Elder, SD to Roy, WA.

Please note the time difference between Box Elder, SD and Roy, WA is 1 hour. The current time in Box Elder is 7:10 am and the current time in Roy is 6:10 am.

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Lowest Price Rental Cars in Box Elder, SD

Planning on renting a car to go from Box Elder, SD to Roy, WA? Here there are some offers to rent a car in Box Elder, SD

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Box Elder »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 47.19 gallons of gas to cover the route between Box Elder, SD and Roy, WA.

The estimated cost of gas to go from Box Elder to Roy is $153.92.

During the route, an average car will release 924.48 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 Box Elder, SD and Roy, WA

If you want to meet halfway between Box Elder, SD and Roy, WA or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 46.50379 and -112.746934, or 46º 30' 13.644" N, 112º 44' 48.9624" W. This location is 587.47 miles away from Box Elder, SD and Roy, WA and it would take approximately 10 hours 31 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Garrison, MT, situated 606 miles from Box Elder, SD and 581 miles from Roy, WA. It would take 10 hours 35 mins to go from Box Elder to Garrison and 10 hours 41 mins to go from Roy to Garrison.