Distance between cities › USA › Texas › Katy, TX › Distance from Katy to O Brien Book Hotels

Distance from Katy, TX to O Brien, TX

Distance

426 mi

Time

8 hours 2 mins

Gas Cost

$39 - $76

There are 342.92 miles from Katy to O Brien in northwest direction and 426 miles (685.58 kilometers) by car, following the TX 71 route.

Katy and O Brien are 8 hours 2 mins far apart, if you drive non-stop .

This is the fastest route from Katy, TX to O Brien, TX. The halfway point is Lometa, TX.

Katy, TX and O Brien, TX are in the same time zone (CDT). Current time in both locations is 11:40 pm.

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Lowest Price Rental Cars in Katy, TX

Planning on renting a car to go from Katy, TX to O Brien, TX? Here there are some offers to rent a car in Katy, TX

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Katy »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 17.11 gallons of gas to cover the route between Katy, TX and O Brien, TX.

The estimated cost of gas to go from Katy to O Brien is $54.86.

During the route, an average car will release 335.25 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 Katy, TX and O Brien, TX

If you want to meet halfway between Katy, TX and O Brien, TX or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 31.157232 and -98.326607, or 31º 9' 26.0352" N, 98º 19' 35.7852" W. This location is 213.04 miles away from Katy, TX and O Brien, TX and it would take approximately 4 hours 1 min to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Lometa, TX, situated 218 miles from Katy, TX and 210 miles from O Brien, TX. It would take 3 hours 40 mins to go from Katy to Lometa and 4 hours 6 mins to go from O Brien to Lometa.