Distance between cities › USA › Texas › Lillian, TX › Distance from Lillian to Roundup Book Hotels

Distance from Lillian, TX to Roundup, MT

Distance

1,371 mi

Time

1 day

Gas Cost

$128 - $248

There are 1,135 miles from Lillian to Roundup in northwest direction and 1,371 miles (2,206.41 kilometers) by car, following the I-25 route.

Lillian and Roundup are 1 day far apart, if you drive non-stop .

This is the fastest route from Lillian, TX to Roundup, MT.

Please note the time difference between Lillian, TX and Roundup, MT is 1 hour. The current time in Lillian is 12:50 pm and the current time in Roundup is 11:50 am.

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Lowest Price Rental Cars in Lillian, TX

Planning on renting a car to go from Lillian, TX to Roundup, MT? Here there are some offers to rent a car in Lillian, TX

Small

From $14

Intermediate

From $18

Full-size

From $24

SUVs

From $28

Vans

From $40

Compare rental car prices in Lillian »

Gas Consumption and Emissions

A car with a fuel efficiency of MPG will need 55.05 gallons of gas to cover the route between Lillian, TX and Roundup, MT.

The estimated cost of gas to go from Lillian to Roundup is $179.56.

During the route, an average car will release 1,078.49 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 Lillian, TX and Roundup, MT

If you want to meet halfway between Lillian, TX and Roundup, MT or just make a stop in the middle of your trip, the exact coordinates of the halfway point of this route are 39.273483 and -103.70099, or 39º 16' 24.5388" N, 103º 42' 3.564" W. This location is 685.34 miles away from Lillian, TX and Roundup, MT and it would take approximately 12 hours 5 mins to reach the halfway point from both locations.

Closest City or Town to Halfway Point

The closest town to the halfway point is Limon, CO, situated 693 miles from Lillian, TX and 679 miles from Roundup, MT. It would take 12 hours 56 mins to go from Lillian to Limon and 11 hours 18 mins to go from Roundup to Limon.