How far is Houston, TX from Port Mansfield, TX?
The driving distance from Houston, TX to Port Mansfield, TX is about 329.9 miles (530.9 km), with a travel time of about 06h 25m by car.
- The straight-line flight distance is about 254.8 miles (410 km).
- For a round trip, plan for roughly 12h 50m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 7:30 AM CST.
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 06h 25m.
Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
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.
Town in Texas, USA
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Cloudy then Slight Chance Rain Showers
Showers And Thunderstorms Likely
Driving Route Map
The map below follows the saved road route between Houston and Port Mansfield.
Turn-by-Turn Driving Directions
Step-by-step road directions between Houston and Port Mansfield.
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1
Start on Louisiana Street
45 m · 12 sec · Louisiana Street
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2
Turn left onto Congress Street
91 m · 15 sec · Congress Street
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3
Turn left onto Smith Street
2.7 mi · 6 min · Smith Street
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4
Merge slight left onto Southwest Freeway
32.8 mi · 38 min · Southwest Freeway
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5
Take the exit slight right toward Spur 10: Cottonwood, Church Road, Hartledge Road
1158 ft · 28 sec
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6
Turn straight onto Southwest Freeway Frontage Road
1.5 km · 2 min · Southwest Freeway Frontage Road
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7
Continue on Southwest Freeway Frontage Road
2217 ft · 1 min · Southwest Freeway Frontage Road
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8
Continue on US 59 Southbound Frontage Road
1.4 km · 2 min · US 59 Southbound Frontage Road
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9
Take the ramp straight
1027 ft · 25 sec
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10
Merge slight left
9.2 mi · 11 min
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11
Keep slight left
6.6 mi · 8 min
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12
Take the exit slight right
1.5 mi · 2 min
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13
Continue on US Highway 59
74.7 mi · 1 hr 22 min · US Highway 59
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14
Keep slight left to continue on Spur 91
1.6 km · 1 min · Spur 91
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15
Merge slight right onto US Highway 77 South
33.2 mi · 38 min · US Highway 77 South
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16
Turn straight onto Alamo Street
37.1 mi · 43 min · Alamo Street
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17
Take the exit straight toward I 37, US 77, I 69E
538 ft · 13 sec
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18
Keep slight left
1965 ft · 48 sec
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19
Merge slight right
2.5 mi · 2 min
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20
Take the exit slight right toward I 69E, US 77: Kingsville, Brownsville
31.3 mi · 34 min
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21
Keep slight left to continue on U.S. Highway 77
61.3 mi · 1 hr 9 min · U.S. Highway 77
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22
Keep slight left to continue on U.S. Highway 77
8.1 mi · 9 min · U.S. Highway 77
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23
Take the exit slight right toward TX 186: Raymondville, Port Mansfield
1595 ft · 39 sec
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24
Turn straight onto Interstate 69E Frontage Road
864 ft · 25 sec · Interstate 69E Frontage Road
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25
Turn left onto East Hidalgo Avenue
3010 ft · 1 min · East Hidalgo Avenue
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26
Turn straight onto Red Fish Bay Road
22.6 mi · 29 min · Red Fish Bay Road
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27
Turn right onto South Port Road
2165 ft · 1 min · South Port Road
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28
Turn right onto Baffin Drive
2300 ft · 1 min · Baffin Drive
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29
Turn straight onto Copano Drive
153 m · 25 sec · Copano Drive
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30
Turn right onto Legion Drive
623 ft · 27 sec · Legion Drive
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31
Arrive at your destination
0 m · 1 sec · Legion Drive
Car Route Details
A richer read on the saved driving route between Houston and Port Mansfield.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
US Highway 59
Continue on US Highway 59
74.7 mi · 01h 22m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
Better with a longer stop
This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.
Mostly Cloudy then Slight Chance Rain Showers leaving Houston and Showers And Thunderstorms Likely near Port Mansfield.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Houston to Port Mansfield?
The road trip is about 329.9 miles (530.9 km) and usually takes 06h 25m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.
What is the halfway point on this route?
Refugio is a useful midpoint, sitting about 165.1 miles from Houston and 164.8 miles from Port Mansfield.
How much longer is the road route than the straight-line distance?
The direct path is about 254.8 miles (410 km), while the road route adds roughly 75.1 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 7:30 AM CST. Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $40.61 one way or $81.22 round trip. Estimated CO2 is about 103.4 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Cloudy then Slight Chance Rain Showers around Houston and Showers And Thunderstorms Likely near Port Mansfield.
Flight Path Map
This map shows the direct air route between Houston and Port Mansfield. Straight-line distance: 254.77 mi (410.02 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 Port Mansfield
Port Mansfield is a place in Texas, United States.
| Population | 0 |
| Coordinates | 26.5547900, -97.4249800 |
| Altitude | 1 |
| Country | United States |
End: Port Mansfield (-97.42498, 26.55479)
Estimated Travel Time
Distance: 531 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 10h 59m |
| 40 mph (64.37 km/h) | 08h 14m |
| 50 mph (80.47 km/h) | 06h 35m |
| 60 mph (96.56 km/h) | 05h 29m |
| 70 mph (112.65 km/h) | 04h 42m |
| 80 mph (129 km/h) | 04h 06m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.49 | $40.61 | $81.22 |
| Mid-grade | $4.00 | $46.53 | $93.05 |
| Premium | $4.38 | $50.93 | $101.85 |
| Diesel | $5.60 | $65.23 | $130.46 |
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 · Nov 09, 2026