How far is Houston, TX from Allen, TX?
The driving distance from Houston, TX to Allen, TX is about 262 miles (421.7 km), with a travel time of about 04h 38m by car.
- The straight-line flight distance is about 243.3 miles (391.5 km).
- For a round trip, plan for roughly 09h 17m 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 38m.
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 Leon County, Texas
Route Weather Snapshot
Check the forecast at both ends before you head out.
Partly Sunny
Chance Showers And Thunderstorms
Driving Route Map
The map below follows the saved road route between Houston and Allen.
Turn-by-Turn Driving Directions
Step-by-step road directions between Houston and Allen.
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1
Start on Louisiana Street
145 m · 20 sec · Louisiana Street
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2
Turn right onto Franklin Street
664 ft · 28 sec · Franklin Street
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3
Turn left onto Travis Street
1205 ft · 29 sec · Travis Street
-
4
Take the ramp straight toward I 45 North Express Lane
1.6 km · 2 min
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5
Merge slight left onto North Freeway
237.1 mi · 4 hr 9 min · North Freeway
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6
Continue on North Central Expressway
22.3 mi · 24 min · North Central Expressway
-
7
Take the exit slight right toward McDermott Drive
891 ft · 17 sec
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8
Turn straight onto South Central Expressway
2870 ft · 51 sec · South Central Expressway
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9
Continue on North Central Expressway
566 ft · 15 sec · North Central Expressway
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10
Turn right onto West Main Street
1976 ft · 58 sec · West Main Street
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11
Arrive at your destination
0 m · 1 sec · West Main Street
Car Route Details
A richer read on the saved driving route between Houston and Allen.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
North Freeway
Merge slight left onto North Freeway
237 mi · 04h 09m
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 leaving Houston and Chance Showers And Thunderstorms near Allen.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Houston to Allen?
The road trip is about 262 miles (421.7 km) and usually takes 04h 38m 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?
Buffalo is a useful midpoint, sitting about 131.2 miles from Houston and 130.8 miles from Allen.
How much longer is the road route than the straight-line distance?
The direct path is about 243.3 miles (391.5 km), while the road route adds roughly 18.7 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 7:42 AM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $34.96 one way or $69.91 round trip. Estimated CO2 is about 82.2 kg one way.
What should you check before leaving?
Before you leave, expect Partly Sunny around Houston and Chance Showers And Thunderstorms near Allen.
Stop Ideas Near Buffalo
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 Buffalo.
Bryan, TX
Waco, TX
Flight Path Map
This map shows the direct air route between Houston and Allen. Straight-line distance: 243.29 mi (391.53 km).
#1 Houston
The fourth most populous city in the United States and the center of the Houston metropolitan area.
| Population | 2,316,120 |
| Coordinates | 29.7632800, -95.3632700 |
| Altitude | 12 |
| Country | United States |
#2 Allen
The fifth most populous city in Collin County, Texas.
| Population | 109,379 |
| Coordinates | 33.1031700, -96.6705500 |
| Altitude | 201 |
| Country | United States |
End: Allen (-96.67055, 33.10317)
Estimated Travel Time
Distance: 422 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 08h 43m |
| 40 mph (64.37 km/h) | 06h 33m |
| 50 mph (80.47 km/h) | 05h 14m |
| 60 mph (96.56 km/h) | 04h 22m |
| 70 mph (112.65 km/h) | 03h 44m |
| 80 mph (129 km/h) | 03h 16m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.78 | $34.96 | $69.91 |
| Mid-grade | $4.25 | $39.33 | $78.66 |
| Premium | $4.59 | $42.47 | $84.93 |
| Diesel | $3.99 | $36.94 | $73.87 |
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 · Apr 15, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.