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

Distance from Katy, TX to Slidell, TX

Distance

309 mi

Time

5 hours 39 mins

Gas Cost

$28 - $55

There are 263.60 miles from Katy to Slidell in northwest direction and 309 miles (497.29 kilometers) by car, following the TX 6 route.

Katy and Slidell are 5 hours 39 mins far apart, if you drive non-stop .

This is the fastest route from Katy, TX to Slidell, TX. The halfway point is Perry, TX.

Katy, TX and Slidell, TX are in the same time zone (CDT). Current time in both locations is 11:36 pm.

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Lowest Price Rental Cars in Katy, TX

Planning on renting a car to go from Katy, TX to Slidell, 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 12.42 gallons of gas to cover the route between Katy, TX and Slidell, TX.

The estimated cost of gas to go from Katy to Slidell is $39.83.

During the route, an average car will release 243.43 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 Slidell, TX

If you want to meet halfway between Katy, TX and Slidell, TX or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 31.445435 and -96.917915, or 31º 26' 43.566" N, 96º 55' 4.494" W. This location is 154.69 miles away from Katy, TX and Slidell, TX and it would take approximately 2 hours 50 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Perry, TX, situated 150 miles from Katy, TX and 159 miles from Slidell, TX. It would take 2 hours 45 mins to go from Katy to Perry and 2 hours 48 mins to go from Slidell to Perry.

Major City Closest to Halfway Point

The major city closest to the halfway point between Katy, TX and Slidell, TX is Waco, TX, situated 171 miles from Katy, TX and 144 miles from Slidell, TX. It would take 3 hours 12 mins to go from Katy to and 2 hours 31 mins to go from Slidell to Waco.