Distance between cities › USA › Texas › Keller, TX › Distance from Keller to Armstrong Book Hotels

Distance from Keller, TX to Armstrong, TX

Distance

460 mi

Time

8 hours 25 mins

Gas Cost

$42 - $82

There are 416.72 miles from Keller to Armstrong in south direction and 460 miles (740.30 kilometers) by car, following the I-35W route.

Keller and Armstrong are 8 hours 25 mins far apart, if you drive non-stop .

This is the fastest route from Keller, TX to Armstrong, TX. The halfway point is Staples, TX.

Keller, TX and Armstrong, TX are in the same time zone (CDT). Current time in both locations is 12:51 pm.

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Lowest Price Rental Cars in Keller, TX

Planning on renting a car to go from Keller, TX to Armstrong, TX? Here there are some offers to rent a car in Keller, TX

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Keller »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 18.46 gallons of gas to cover the route between Keller, TX and Armstrong, TX.

The estimated cost of gas to go from Keller to Armstrong is $59.18.

During the route, an average car will release 361.64 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 Keller, TX and Armstrong, TX

If you want to meet halfway between Keller, TX and Armstrong, TX or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 29.764585 and -97.825584, or 29º 45' 52.506" N, 97º 49' 32.1024" W. This location is 229.81 miles away from Keller, TX and Armstrong, TX and it would take approximately 4 hours 12 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Staples, TX, situated 250 miles from Keller, TX and 246 miles from Armstrong, TX. It would take 3 hours 38 mins to go from Keller to Staples and 3 hours 57 mins to go from Armstrong to Staples.