How far is Dallas, TX from Sweeny, TX?
The driving distance from Dallas, TX to Sweeny, TX is about 303.8 miles (488.9 km), with a travel time of about 05h 38m by car.
- The straight-line flight distance is about 266.9 miles (429.5 km).
- For a round trip, plan for roughly 11h 16m 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 05h 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 Texas, USA
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Cloudy
Driving Route Map
The map below follows the saved road route between Dallas and Sweeny.
Turn-by-Turn Driving Directions
Step-by-step road directions between Dallas and Sweeny.
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1
Start on North Lamar Street
132 m · 14 sec · North Lamar Street
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2
Turn right onto McKinney Avenue
1118 ft · 25 sec · McKinney Avenue
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3
Take the ramp slight left toward US 75 North
1229 ft · 30 sec
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4
Merge slight left onto Woodall Rodgers Freeway
2170 ft · 37 sec · Woodall Rodgers Freeway
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5
Keep slight right to continue on I 45 South: Houston
2537 ft · 49 sec
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6
Merge slight left onto Julius Schepps Freeway
3.1 mi · 4 min · Julius Schepps Freeway
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7
Keep slight left to continue on Julius Schepps Freeway
234.2 mi · 4 hr 6 min · Julius Schepps Freeway
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8
Continue on Gulf Freeway
2.6 mi · 3 min · Gulf Freeway
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9
Take the exit slight right toward US 59 South, TX 288 South, I 69 South: Lake Jackson, Freeport, Victoria
1.2 km · 1 min
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10
Keep slight left to continue on TX 288 South: Lake Jackson, Freeport
2698 ft · 1 min
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11
Continue on South Freeway
1 km · 47 sec · South Freeway
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12
Keep slight left
14.4 mi · 17 min
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13
Merge slight right onto South Freeway
1312 ft · 17 sec · South Freeway
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14
Continue on Nolan Ryan Expressway
24.6 mi · 28 min · Nolan Ryan Expressway
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15
Take the exit slight right toward TX 35
2550 ft · 1 min
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16
Turn right onto Jimmy Phillips Boulevard
11.3 mi · 17 min · Jimmy Phillips Boulevard
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17
Continue on East Brazos Avenue
1.5 km · 2 min · East Brazos Avenue
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18
Turn left onto South 17th Street
2 mi · 4 min · South 17th Street
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19
At the end of the road, turn left
2.2 mi · 3 min
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20
Turn left
3.5 mi · 6 min
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21
Keep slight left to continue on North McKinney Street
1588 ft · 32 sec · North McKinney Street
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22
Turn straight onto East 2nd Street
1.3 km · 1 min · East 2nd Street
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23
Turn left onto North Main Street
24 m · 2 sec · North Main Street
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24
Arrive at your destination
0 m · 1 sec · North Main Street
Car Route Details
A richer read on the saved driving route between Dallas and Sweeny.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
Julius Schepps Freeway
Keep slight left to continue on Julius Schepps Freeway
234 mi · 04h 06m
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 Dallas and Mostly Cloudy near Sweeny.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Dallas to Sweeny?
The road trip is about 303.8 miles (488.9 km) and usually takes 05h 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?
Madisonville is a useful midpoint, sitting about 152.2 miles from Dallas and 151.6 miles from Sweeny.
How much longer is the road route than the straight-line distance?
The direct path is about 266.9 miles (429.5 km), while the road route adds roughly 36.9 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 5:44 AM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $40.51 one way or $81.02 round trip. Estimated CO2 is about 95.3 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Cloudy around Dallas and Mostly Cloudy near Sweeny.
Stop Ideas Near Madisonville
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 Madisonville.
Bryan, TX
Prairie View, TX
Flight Path Map
This map shows the direct air route between Dallas and Sweeny. Straight-line distance: 266.9 mi (429.54 km).
#1 Dallas
The ninth most populous city in the United States and the center of the Dallas-Fort Worth metropolitan area.
| Population | 1,343,266 |
| Coordinates | 32.7830600, -96.8066700 |
| Altitude | 128 |
| Country | United States |
#2 Sweeny
City in Brazoria County, Texas, United States
| Population | 3,618 |
| Coordinates | 29.0388600, -95.6985600 |
| Altitude | 9 |
| Country | United States |
End: Sweeny (-95.69856, 29.03886)
Estimated Travel Time
Distance: 489 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 10h 07m |
| 40 mph (64.37 km/h) | 07h 35m |
| 50 mph (80.47 km/h) | 06h 04m |
| 60 mph (96.56 km/h) | 05h 03m |
| 70 mph (112.65 km/h) | 04h 20m |
| 80 mph (129 km/h) | 03h 47m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.78 | $40.51 | $81.02 |
| Mid-grade | $4.25 | $45.58 | $91.16 |
| Premium | $4.59 | $49.22 | $98.43 |
| Diesel | $3.99 | $42.80 | $85.61 |
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.