Distance between cities › USA › Texas › Smiley, TX › Distance from Smiley to Harper Book Hotels

Distance from Smiley, TX to Harper, TX

Distance

144 mi

Time

2 hours 44 mins

Gas Cost

$13 - $26

There are 119.95 miles from Smiley to Harper in northwest direction and 144 miles (231.75 kilometers) by car, following the I-10 and US-87 route.

Smiley and Harper are 2 hours 44 mins far apart, if you drive non-stop .

This is the fastest route from Smiley, TX to Harper, TX. The halfway point is Shavano Park, TX.

Smiley, TX and Harper, TX are in the same time zone (CDT). Current time in both locations is 3:42 pm.

Any questions or tips to share?

Share with fellow travellers any question or tips about the route from Smiley, TX to Harper, TX:

Lowest Price Rental Cars in Smiley, TX

Planning on renting a car to go from Smiley, TX to Harper, TX? Here there are some offers to rent a car in Smiley, TX

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Smiley »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 5.79 gallons of gas to cover the route between Smiley, TX and Harper, TX.

The estimated cost of gas to go from Smiley to Harper is $18.57.

During the route, an average car will release 113.47 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 $3.21 per gallon of regular gas. Price last updated on March 11, 2026.
Read more about our CO₂ calculation.

Halfway Point Between Smiley, TX and Harper, TX

If you want to meet halfway between Smiley, TX and Harper, TX or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 29.607269 and -98.527504, or 29º 36' 26.1684" N, 98º 31' 39.0144" W. This location is 72.10 miles away from Smiley, TX and Harper, TX and it would take approximately 1 hour 22 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Shavano Park, TX, situated 74 miles from Smiley, TX and 72 miles from Harper, TX. It would take 1 hour 27 mins to go from Smiley to Shavano Park and 1 hour 25 mins to go from Harper to Shavano Park.

Major City Closest to Halfway Point

The major city closest to the halfway point between Smiley, TX and Harper, TX is San Antonio, TX, situated 59 miles from Smiley, TX and 84 miles from Harper, TX. It would take 1 hour 18 mins to go from Smiley to and 1 hour 36 mins to go from Harper to San Antonio.