Distance between cities › USA › Texas › San Leon, TX › Distance from San Leon to Castleton Book Hotels

Distance from San Leon, TX to Castleton, IL

Distance

1,016 mi

Time

19 hours 19 mins

Gas Cost

$93 - $181

There are 855.51 miles from San Leon to Castleton in northeast direction and 1,016 miles (1,635.09 kilometers) by car, following the I-30 route.

San Leon and Castleton are 19 hours 19 mins far apart, if you drive non-stop .

This is the fastest route from San Leon, TX to Castleton, IL.

San Leon, TX and Castleton, IL are in the same time zone (CDT). Current time in both locations is 2:20 pm.

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Lowest Price Rental Cars in San Leon, TX

Planning on renting a car to go from San Leon, TX to Castleton, IL? Here there are some offers to rent a car in San Leon, TX

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in San Leon »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 40.79 gallons of gas to cover the route between San Leon, TX and Castleton, IL.

The estimated cost of gas to go from San Leon to Castleton is $130.70.

During the route, an average car will release 799.23 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 $3.20 per gallon of regular gas. Price last updated on March 11, 2026.
Read more about our CO₂ calculation.

Halfway Point Between San Leon, TX and Castleton, IL

If you want to meet halfway between San Leon, TX and Castleton, IL or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 35.145264 and -91.800715, or 35º 8' 42.9504" N, 91º 48' 2.574" W. This location is 507.88 miles away from San Leon, TX and Castleton, IL and it would take approximately 9 hours 39 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Garner, AR, situated 511 miles from San Leon, TX and 507 miles from Castleton, IL. It would take 9 hours 30 mins to go from San Leon to Garner and 9 hours 55 mins to go from Castleton to Garner.