Distance between cities › USA › South Dakota › Armour, SD › Distance from Armour to Marathon Book Hotels

Distance from Armour, SD to Marathon, WI

Distance

520 mi

Time

9 hours 50 mins

Gas Cost

$48 - $94

There are 436.12 miles from Armour to Marathon in northeast direction and 520 miles (836.86 kilometers) by car, following the I-90 route.

Armour and Marathon are 9 hours 50 mins far apart, if you drive non-stop .

This is the fastest route from Armour, SD to Marathon, WI. The halfway point is Lake Crystal, MN.

Armour, SD and Marathon, WI are in the same time zone (CDT). Current time in both locations is 1:08 pm.

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Lowest Price Rental Cars in Armour, SD

Planning on renting a car to go from Armour, SD to Marathon, WI? Here there are some offers to rent a car in Armour, SD

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Armour »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 20.89 gallons of gas to cover the route between Armour, SD and Marathon, WI.

The estimated cost of gas to go from Armour to Marathon is $68.13.

During the route, an average car will release 409.19 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 Armour, SD and Marathon, WI

If you want to meet halfway between Armour, SD and Marathon, WI or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 44.125648 and -94.179359, or 44º 7' 32.3328" N, 94º 10' 45.6924" W. This location is 260.02 miles away from Armour, SD and Marathon, WI and it would take approximately 4 hours 55 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Lake Crystal, MN, situated 257 miles from Armour, SD and 263 miles from Marathon, WI. It would take 3 hours 54 mins to go from Armour to Lake Crystal and 4 hours 9 mins to go from Marathon to Lake Crystal.