Distance between cities › USA › Idaho › Downey, ID › Distance from Downey to Rockham Book Hotels

Distance from Downey, ID to Rockham, SD

Distance

1,010 mi

Time

18 hours 15 mins

Gas Cost

$94 - $183

There are 685.47 miles from Downey to Rockham in northeast direction and 1,010 miles (1,625.44 kilometers) by car, following the I-80 and US-189 route.

Downey and Rockham are 18 hours 15 mins far apart, if you drive non-stop .

This is the fastest route from Downey, ID to Rockham, SD.

Please note the time difference between Downey, ID and Rockham, SD is 1 hour. The current time in Downey is 10:55 am and the current time in Rockham is 11:55 am.

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Lowest Price Rental Cars in Downey, ID

Planning on renting a car to go from Downey, ID to Rockham, SD? Here there are some offers to rent a car in Downey, ID

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Downey »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 40.57 gallons of gas to cover the route between Downey, ID and Rockham, SD.

The estimated cost of gas to go from Downey to Rockham is $132.35.

During the route, an average car will release 794.88 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 Downey, ID and Rockham, SD

If you want to meet halfway between Downey, ID and Rockham, SD or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 43.284301 and -106.280572, or 43º 17' 3.4836" N, 106º 16' 50.0592" W. This location is 505.12 miles away from Downey, ID and Rockham, SD and it would take approximately 9 hours 7 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Midwest, WY, situated 533 miles from Downey, ID and 478 miles from Rockham, SD. It would take 9 hours 12 mins to go from Downey to Midwest and 9 hours 7 mins to go from Rockham to Midwest.