How far is Grand Prairie, TX from Round Rock, TX?
The driving distance from Grand Prairie, TX to Round Rock, TX is about 181.9 miles (292.7 km), with a travel time of about 03h 14m by car.
- The straight-line flight distance is about 159.7 miles (257 km).
- For a round trip, plan for roughly 06h 29m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 8:00 AM CDT.
Reverse, save, or send this route
This drive is better planned with a longer stop or an overnight stay. Copy the route link, send it to another device, or print a clean version before you head out.
This drive is better planned with a longer stop or an overnight stay.
Flight Distance
Driving Distance
Gas Cost Calculator
Leave and Arrive Planner
Pick a departure time to see your estimated arrival and same-day return window.
Drive time stays fixed at 03h 14m.
An early departure helps you fit a real stop into the day without turning the return into a late-night drive.
You are leaving earlier than the recommended window, which gives you extra margin for breaks and traffic.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
City in Texas, United States of America
Route Weather Snapshot
Check the forecast at both ends before you head out.
Partly Sunny then Slight Chance Showers And Thunderstorms
Mostly Cloudy
Driving Route Map
The map below follows the saved road route between Grand Prairie and Round Rock.
Turn-by-Turn Driving Directions
Step-by-step road directions between Grand Prairie and Round Rock.
-
1
Start on the route
67 m · 22 sec
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2
Turn left onto Northeast 5th Street
58 m · 14 sec · Northeast 5th Street
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3
Turn left onto East Main Street
1069 ft · 27 sec · East Main Street
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4
Turn right onto South Belt Line Road
5.4 mi · 10 min · South Belt Line Road
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5
Take the ramp left toward I 20 East
1720 ft · 42 sec
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6
Merge slight left onto Lyndon B Johnson Freeway
9.3 mi · 10 min · Lyndon B Johnson Freeway
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7
Take the exit slight right toward I 35E South: Waco
2016 ft · 45 sec
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8
Merge slight left onto South R L Thornton Freeway
80.5 mi · 1 hr 22 min · South R L Thornton Freeway
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9
Continue on North Jack Kultgen Expressway
6.6 mi · 8 min · North Jack Kultgen Expressway
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10
Continue on Purple Heart Trail
37.9 mi · 39 min · Purple Heart Trail
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11
Keep slight left
40.2 mi · 41 min
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12
Take the exit slight right toward RM 620: McNeil Road
1111 ft · 27 sec
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13
Turn straight onto North Interstate 35
1387 ft · 21 sec · North Interstate 35
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14
Turn left onto Round Rock Avenue
2128 ft · 53 sec · Round Rock Avenue
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15
Enter the roundabout and take exit 1 toward North Blair Street
13 m · 1 sec · North Blair Street
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16
Exit the roundabout onto North Blair Street
58 m · 10 sec · North Blair Street
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17
Turn left onto West Main Street
107 m · 16 sec · West Main Street
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18
Turn right onto South Mays Street
33 m · 3 sec · South Mays Street
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19
Arrive at your destination
0 m · 1 sec · South Mays Street
Car Route Details
A richer read on the saved driving route between Grand Prairie and Round Rock.
Interchange-aware route
The drive includes several ramps, exits, or merges, so checking the next few maneuvers before busy interchanges is useful.
South R L Thornton Freeway
Merge slight left onto South R L Thornton Freeway
80.5 mi · 01h 22m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A longer out-and-back drive
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
Partly Sunny then Slight Chance Showers And Thunderstorms leaving Grand Prairie and Mostly Cloudy near Round Rock.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Grand Prairie to Round Rock?
The road trip is about 181.9 miles (292.7 km) and usually takes 03h 14m in normal driving conditions.
Is this a same-day trip or an overnight route?
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
What is the halfway point on this route?
Northcrest is a useful midpoint, sitting about 91.1 miles from Grand Prairie and 90.8 miles from Round Rock.
How much longer is the road route than the straight-line distance?
The direct path is about 159.7 miles (257 km), while the road route adds roughly 22.2 extra miles because roads do not follow the straight air line.
When is the best time to leave for this route?
A good departure window is usually 6:00 AM to 8:00 AM CDT. If you want a more comfortable same-day return, try to leave by 10:30 AM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $24.26 one way or $48.52 round trip. Estimated CO2 is about 57.1 kg one way.
What should you check before leaving?
Before you leave, expect Partly Sunny then Slight Chance Showers And Thunderstorms around Grand Prairie and Mostly Cloudy near Round Rock.
Stop Ideas Near Northcrest
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Northcrest.
Waco, TX
McGregor
Temple
Killeen, Texas
Flight Path Map
This map shows the direct air route between Grand Prairie and Round Rock. Straight-line distance: 159.72 mi (257.04 km).
#1 Grand Prairie
The ninth most populous city in Texas.
| Population | 195,272 |
| Coordinates | 32.7459600, -96.9977800 |
| Altitude | 157 |
| Country | United States |
#2 Round Rock
The fourth most populous city in Williamson County, Texas.
| Population | 137,575 |
| Coordinates | 30.5082600, -97.6789000 |
| Altitude | 224 |
| Country | United States |
End: Round Rock (-97.6789, 30.50826)
Estimated Travel Time
Distance: 293 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 06h 03m |
| 40 mph (64.37 km/h) | 04h 32m |
| 50 mph (80.47 km/h) | 03h 38m |
| 60 mph (96.56 km/h) | 03h 01m |
| 70 mph (112.65 km/h) | 02h 35m |
| 80 mph (129 km/h) | 02h 16m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.78 | $24.26 | $48.52 |
| Mid-grade | $4.25 | $27.30 | $54.60 |
| Premium | $4.59 | $29.47 | $58.95 |
| Diesel | $3.99 | $25.64 | $51.27 |
Assumes 8.3 L/100 km (about 28.3 MPG). CO2 is an estimate and varies by vehicle, fuel blend, traffic, and terrain.
Prices in Texas · May 17, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.