Distance between cities › USA › Texas › Tomball, TX › Distance from Tomball to Harmon Book Hotels

Distance from Tomball, TX to Harmon, OK

Distance

572 mi

Time

10 hours 23 mins

Gas Cost

$52 - $102

There are 476 miles from Tomball to Harmon in northwest direction and 572 miles (920.54 kilometers) by car, following the I-35 and US-77 route.

Tomball and Harmon are 10 hours 23 mins far apart, if you drive non-stop .

This is the fastest route from Tomball, TX to Harmon, OK.

Tomball, TX and Harmon, OK are in the same time zone (CDT). Current time in both locations is 8:24 pm.

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Lowest Price Rental Cars in Tomball, TX

Planning on renting a car to go from Tomball, TX to Harmon, OK? Here there are some offers to rent a car in Tomball, TX

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Tomball »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 22.97 gallons of gas to cover the route between Tomball, TX and Harmon, OK.

The estimated cost of gas to go from Tomball to Harmon is $73.58.

During the route, an average car will release 449.94 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 Tomball, TX and Harmon, OK

If you want to meet halfway between Tomball, TX and Harmon, OK or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 33.588559 and -97.164478, or 33º 35' 18.8124" N, 97º 9' 52.1208" W. This location is 285.92 miles away from Tomball, TX and Harmon, OK and it would take approximately 5 hours 11 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Gainesville, TX, situated 297 miles from Tomball, TX and 277 miles from Harmon, OK. It would take 5 hours 19 mins to go from Tomball to Gainesville and 5 hours 11 mins to go from Harmon to Gainesville.

Major City Closest to Halfway Point

The major city closest to the halfway point between Tomball, TX and Harmon, OK is Denton, TX, situated 262 miles from Tomball, TX and 306 miles from Harmon, OK. It would take 4 hours 48 mins to go from Tomball to Denton and 5 hours 42 mins to go from Harmon to Denton.