Distance between cities › USA › North Carolina › Boone, NC › Distance from Boone to Mill Spring Book Hotels

Distance from Boone, NC to Mill Spring, NC

Distance

91 mi

Time

2 hours 18 mins

Gas Cost

$9 - $17

There are 69.13 miles from Boone to Mill Spring in southwest direction and 91 miles (146.45 kilometers) by car, following the US-221 route.

Boone and Mill Spring are 2 hours 18 mins far apart, if you drive non-stop .

This is the fastest route from Boone, NC to Mill Spring, NC. The halfway point is Morganton, NC.

Boone, NC and Mill Spring, NC are in the same time zone (EDT). Current time in both locations is 5:54 pm.

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Lowest Price Rental Cars in Boone, NC

Planning on renting a car to go from Boone, NC to Mill Spring, NC? Here there are some offers to rent a car in Boone, NC

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Boone »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 3.65 gallons of gas to cover the route between Boone, NC and Mill Spring, NC.

The estimated cost of gas to go from Boone to Mill Spring is $12.12.

During the route, an average car will release 71.47 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 $3.32 per gallon of regular gas. Price last updated on March 12, 2026.
Read more about our CO₂ calculation.

Halfway Point Between Boone, NC and Mill Spring, NC

If you want to meet halfway between Boone, NC and Mill Spring, NC or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 35.701397 and -81.709503, or 35º 42' 5.0292" N, 81º 42' 34.2108" W. This location is 45.42 miles away from Boone, NC and Mill Spring, NC and it would take approximately 1 hour 9 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Morganton, NC, situated 42 miles from Boone, NC and 47 miles from Mill Spring, NC. It would take 55 minutes to go from Boone to Morganton and 1 hour 8 mins to go from Mill Spring to Morganton.