How far is Grand Prairie, TX from Katy, TX?
The driving distance from Grand Prairie, TX to Katy, TX is about 267.8 miles (431 km), with a travel time of about 04h 47m by car.
- The straight-line flight distance is about 215.9 miles (347.5 km).
- For a round trip, plan for roughly 09h 34m 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 04h 47m.
An early departure helps you fit a real stop into the day without turning the return into a late-night drive.
This departure sits inside the recommended comfort window for the route.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
City in Leon County, Texas, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Cloudy
Mostly Cloudy
Driving Route Map
The map below follows the saved road route between Grand Prairie and Katy.
Turn-by-Turn Driving Directions
Step-by-step road directions between Grand Prairie and Katy.
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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
15.2 mi · 16 min · Lyndon B Johnson Freeway
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7
Take the exit slight right toward I 45 South: Houston
1607 ft · 34 sec
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8
Merge slight left onto Julius Schepps Freeway
203.7 mi · 3 hr 29 min · Julius Schepps Freeway
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9
Take the exit slight right toward 99 Toll West: Grand Parkway
1 mi · 2 min
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10
Keep slight left
1266 ft · 31 sec
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11
Merge slight left onto North Grand Parkway West
37.8 mi · 41 min · North Grand Parkway West
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12
Take the exit slight right toward I 10 East, I 10 West: Houston, San Antonio
3149 ft · 1 min
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13
Keep slight right to continue on I 10 West: San Antonio
1.1 km · 1 min
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14
Merge slight left onto Katy Freeway
1.1 km · 43 sec · Katy Freeway
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15
Take the exit slight right toward US 90 West: Katy Mills Boulevard
2779 ft · 1 min
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16
Turn right onto Highway Boulevard
1 mi · 2 min · Highway Boulevard
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17
Arrive at your destination
0 m · 1 sec · Highway Boulevard
Car Route Details
A richer read on the saved driving route between Grand Prairie and Katy.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
Julius Schepps Freeway
Merge slight left onto Julius Schepps Freeway
204 mi · 03h 29m
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.
Mostly Cloudy leaving Grand Prairie and Mostly Cloudy near Katy.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Grand Prairie to Katy?
The road trip is about 267.8 miles (431 km) and usually takes 04h 47m 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?
Leona is a useful midpoint, sitting about 134.1 miles from Grand Prairie and 133.7 miles from Katy.
How much longer is the road route than the straight-line distance?
The direct path is about 215.9 miles (347.5 km), while the road route adds roughly 51.9 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 7:26 AM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $35.71 one way or $71.42 round trip. Estimated CO2 is about 84 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Cloudy around Grand Prairie and Mostly Cloudy near Katy.
Stop Ideas Near Leona
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 Leona.
Bryan, TX
Waco, TX
Flight Path Map
This map shows the direct air route between Grand Prairie and Katy. Straight-line distance: 215.95 mi (347.53 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 Katy
City in Texas, United States; within the Houston–The Woodlands–Sugar Land metropolitan area
| Population | 23,889 |
| Coordinates | 29.7857900, -95.8244000 |
| Altitude | 42 |
| Country | United States |
End: Katy (-95.8244, 29.78579)
Estimated Travel Time
Distance: 431 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 08h 55m |
| 40 mph (64.37 km/h) | 06h 41m |
| 50 mph (80.47 km/h) | 05h 21m |
| 60 mph (96.56 km/h) | 04h 27m |
| 70 mph (112.65 km/h) | 03h 49m |
| 80 mph (129 km/h) | 03h 20m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.78 | $35.71 | $71.42 |
| Mid-grade | $4.25 | $40.18 | $80.36 |
| Premium | $4.59 | $43.38 | $86.77 |
| Diesel | $3.99 | $37.73 | $75.47 |
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 05, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.