How far is Port Isabel, TX from Austin, TX?
The driving distance from Port Isabel, TX to Austin, TX is about 360.9 miles (580.8 km), with a travel time of about 05h 28m by car.
- The straight-line flight distance is about 291.6 miles (469.3 km).
- For a round trip, plan for roughly 10h 56m 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 28m.
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
Route Weather Snapshot
Check the forecast at both ends before you head out.
Showers And Thunderstorms Likely
Slight Chance Rain Showers then Mostly Cloudy
Driving Route Map
The map below follows the saved road route between Port Isabel and Austin.
Turn-by-Turn Driving Directions
Step-by-step road directions between Port Isabel and Austin.
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1
Start on South Musina Street
985 ft · 33 sec · South Musina Street
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2
Turn left onto West Queen Isabella Boulevard
741 ft · 23 sec · West Queen Isabella Boulevard
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3
Turn straight onto State Highway 100
1 mi · 3 min · State Highway 100
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4
Turn left
14.1 mi · 15 min
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5
Take the exit slight right toward TX 550
936 ft · 23 sec
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6
Keep slight right to continue on TX 550
14 m · 1 sec
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7
Turn right onto State Highway 550
3.6 mi · 4 min · State Highway 550
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8
Continue straight
1.9 mi · 2 min
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9
Continue on I-169, TX 550 Toll
1.5 km · 59 sec · I-169, TX 550 Toll
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10
Continue on Interstate 169
3.6 mi · 4 min · Interstate 169
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11
Merge slight left onto North Expressway
2.2 mi · 2 min · North Expressway
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12
Continue on U.S. Highway 77
102 mi · 1 hr 53 min · U.S. Highway 77
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13
Keep slight right
623 ft · 8 sec
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14
Keep slight right
1.2 km · 2 min
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15
Turn left onto FM 772
1009 ft · 17 sec · FM 772
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16
Turn straight onto South 6th Street
4.4 mi · 7 min · South 6th Street
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17
Turn left onto West King Avenue
14.5 mi · 18 min · West King Avenue
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18
Take the ramp right
1 km · 2 min
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19
Merge slight left
54.2 mi · 1 hr 2 min
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20
Keep slight left to continue on Nueces Street
14.7 mi · 19 min · Nueces Street
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21
Continue straight
1199 ft · 16 sec
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22
Take the exit straight
60.8 mi · 1 hr 2 min
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23
Take the exit slight right toward I 410, TX 130, US 281 South
971 ft · 24 sec
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24
Keep slight right to continue on I 410 North, TX 130 North
2383 ft · 58 sec
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25
Merge slight left onto Connally Loop
10.6 mi · 12 min · Connally Loop
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26
Merge slight left onto North Pan Am Expressway
2.8 mi · 3 min · North Pan Am Expressway
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27
Keep slight left to continue on North Pan Am Expressway
7.4 mi · 8 min · North Pan Am Expressway
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28
Continue on Purple Heart Trail
11.9 mi · 13 min · Purple Heart Trail
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29
Continue on Interstate Highway 35
1.9 mi · 2 min · Interstate Highway 35
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30
Continue on Purple Heart Trail
46.7 mi · 51 min · Purple Heart Trail
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31
Take the exit slight right toward 6th - 12th Streets
665 ft · 24 sec
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32
Turn left onto East 6th Street
2863 ft · 1 min · East 6th Street
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33
Turn left onto Congress Avenue
109 m · 18 sec · Congress Avenue
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34
Turn left onto East 5th Street
8 m · 1 sec · East 5th Street
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35
Arrive at your destination
0 m · 1 sec · East 5th Street
Car Route Details
A richer read on the saved driving route between Port Isabel and Austin.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
U.S. Highway 77
Continue on U.S. Highway 77
102 mi · 01h 53m
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.
Showers And Thunderstorms Likely leaving Port Isabel and Slight Chance Rain Showers then Mostly Cloudy near Austin.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Port Isabel to Austin?
The road trip is about 360.9 miles (580.8 km) and usually takes 05h 28m 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?
Orange Grove is a useful midpoint, sitting about 181.9 miles from Port Isabel and 179.1 miles from Austin.
How much longer is the road route than the straight-line distance?
The direct path is about 291.6 miles (469.3 km), while the road route adds roughly 69.3 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 6:04 AM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $48.14 one way or $96.29 round trip. Estimated CO2 is about 113.2 kg one way.
What should you check before leaving?
Before you leave, expect Showers And Thunderstorms Likely around Port Isabel and Slight Chance Rain Showers then Mostly Cloudy near Austin.
Flight Path Map
This map shows the direct air route between Port Isabel and Austin. Straight-line distance: 291.58 mi (469.25 km).
#1 Port Isabel
City in Cameron County, Texas, United States
| Population | 6,226 |
| Coordinates | 26.0734100, -97.2085800 |
| Altitude | 2 |
| Country | United States |
#2 Austin
The eleventh most populous city in the United States and the center of the Austin metropolitan area.
| Population | 995,484 |
| Coordinates | 30.2671500, -97.7430600 |
| Altitude | 149 |
| Country | United States |
End: East 5th Street (-97.743073, 30.267115)
Estimated Travel Time
Distance: 581 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 12h 01m |
| 40 mph (64.37 km/h) | 09h 01m |
| 50 mph (80.47 km/h) | 07h 13m |
| 60 mph (96.56 km/h) | 06h 00m |
| 70 mph (112.65 km/h) | 05h 09m |
| 80 mph (129 km/h) | 04h 30m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.78 | $48.14 | $96.29 |
| Mid-grade | $4.25 | $54.17 | $108.34 |
| Premium | $4.59 | $58.49 | $116.98 |
| Diesel | $3.99 | $50.87 | $101.74 |
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 19, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.