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

Distance from Katy, TX to Helena, CA

Distance

2,117 mi

Time

1 day 12 hours

Gas Cost

$197 - $384

There are 1,707.22 miles from Katy to Helena in northwest direction and 2,117 miles (3,406.98 kilometers) by car, following the I-10 and US-87 route.

Katy and Helena are 1 day 12 hours far apart, if you drive non-stop .

This is the fastest route from Katy, TX to Helena, CA. The halfway point is Cortaro, AZ.

Please note the time difference between Katy, TX and Helena, CA is 2 hours. The current time in Katy is 3:17 am and the current time in Helena is 1:17 am.

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Lowest Price Rental Cars in Katy, TX

Planning on renting a car to go from Katy, TX to Helena, CA? 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 85.02 gallons of gas to cover the route between Katy, TX and Helena, CA.

The estimated cost of gas to go from Katy to Helena is $277.33.

During the route, an average car will release 1,665.70 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 $3.26 per gallon of regular gas. Price last updated on March 12, 2026.
Read more about our CO₂ calculation.

Halfway Point Between Katy, TX and Helena, CA

If you want to meet halfway between Katy, TX and Helena, CA or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 32.374649 and -111.129501, or 32º 22' 28.7364" N, 111º 7' 46.2036" W. This location is 1,058.49 miles away from Katy, TX and Helena, CA and it would take approximately 18 hours 25 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Cortaro, AZ, situated 1,045 miles from Katy, TX and 1,075 miles from Helena, CA. It would take 15 hours 35 mins to go from Katy to Cortaro and 15 hours 59 mins to go from Helena to Cortaro.

Major City Closest to Halfway Point

The major city closest to the halfway point between Katy, TX and Helena, CA is Tucson, AZ, situated 1,032 miles from Katy, TX and 1,089 miles from Helena, CA. It would take 15 hours 25 mins to go from Katy to and 16 hours 14 mins to go from Helena to Tucson.