How far is San Antonio, TX from Port O'Connor, TX?
The driving distance from San Antonio, TX to Port O'Connor, TX is about 164.5 miles (264.7 km), with a travel time of about 03h 31m by car.
- The straight-line flight distance is about 143.1 miles (230.3 km).
- For a round trip, plan for roughly 07h 02m 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 03h 31m.
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, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Partly Sunny then Chance Showers And Thunderstorms
Haze then Mostly Sunny
Driving Route Map
The map below follows the saved road route between San Antonio and Port O'Connor.
Turn-by-Turn Driving Directions
Step-by-step road directions between San Antonio and Port O'Connor.
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1
Start on Dolorosa Street
44 m · 5 sec · Dolorosa Street
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2
Continue on West Market Street
1893 ft · 42 sec · West Market Street
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3
Continue on East Market Street
2143 ft · 41 sec · East Market Street
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4
Turn right onto Tower of the Americas Way
957 ft · 21 sec · Tower of the Americas Way
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5
Take the ramp slight left toward I 37 South, US 281 South
1374 ft · 34 sec
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6
Merge slight left onto William J Bordelon Freeway
1.1 mi · 1 min · William J Bordelon Freeway
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7
Take the exit slight right toward I 10 East, US 90 East, US 87 South, I 10 West, US 90 West, US 87 North: Houston, El Paso
903 ft · 22 sec
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8
Keep slight left to continue on I 10 East, US 90 East, US 87 South: Houston, Victoria
3113 ft · 1 min
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9
Merge slight left onto Jose Lopez Freeway
1.7 mi · 2 min · Jose Lopez Freeway
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10
Take the exit slight right toward US 87 South: Roland Avenue, Victoria
1243 ft · 33 sec
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11
Turn right onto Roland Avenue
2819 ft · 1 min · Roland Avenue
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12
Turn slight left onto Rigsby Avenue
4.7 mi · 8 min · Rigsby Avenue
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13
Continue on US Highway 87 East
48.7 mi · 56 min · US Highway 87 East
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14
Continue on West Fay
22.9 mi · 25 min · West Fay
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15
Turn left
3.9 mi · 5 min
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16
Turn left onto South Esplanade Street
1.2 km · 60 sec · South Esplanade Street
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17
Turn right onto East Broadway Street
23.8 mi · 27 min · East Broadway Street
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18
Continue on North Main Street
3.9 mi · 6 min · North Main Street
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19
Turn left onto East Rio Grande Street
1331 ft · 26 sec · East Rio Grande Street
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20
Turn right onto North Navarro Street
2462 ft · 51 sec · North Navarro Street
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21
Turn left onto East Goodwin Avenue
1798 ft · 31 sec · East Goodwin Avenue
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22
Continue on Port Lavaca Drive
21.3 mi · 25 min · Port Lavaca Drive
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23
Keep slight left
4.1 mi · 5 min
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24
Turn right onto Alcoa Drive
1.3 km · 2 min · Alcoa Drive
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25
Turn right onto West Austin Street
3.1 mi · 5 min · West Austin Street
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26
Continue straight
1.5 km · 2 min
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27
Turn left
11.2 mi · 20 min
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28
At the end of the road, turn left onto State Highway 185 East
6.9 mi · 12 min · State Highway 185 East
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29
Continue on Adams Avenue
1.5 km · 2 min · Adams Avenue
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30
Turn right onto 2nd Street
28 m · 3 sec · 2nd Street
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31
Arrive at your destination
0 m · 1 sec · 2nd Street
Car Route Details
A richer read on the saved driving route between San Antonio and Port O'Connor.
Interchange-aware route
The drive includes several ramps, exits, or merges, so checking the next few maneuvers before busy interchanges is useful.
US Highway 87 East
Continue on US Highway 87 East
48.7 mi · 00h 56m
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 then Chance Showers And Thunderstorms leaving San Antonio and Haze then Mostly Sunny near Port O'Connor.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from San Antonio to Port O'Connor?
The road trip is about 164.5 miles (264.7 km) and usually takes 03h 31m 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?
Cuero is a useful midpoint, sitting about 82.2 miles from San Antonio and 82.3 miles from Port O'Connor.
How much longer is the road route than the straight-line distance?
The direct path is about 143.1 miles (230.3 km), while the road route adds roughly 21.4 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 9:58 AM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $21.92 one way or $43.84 round trip. Estimated CO2 is about 51.5 kg one way.
What should you check before leaving?
Before you leave, expect Partly Sunny then Chance Showers And Thunderstorms around San Antonio and Haze then Mostly Sunny near Port O'Connor.
Stop Ideas Near Cuero
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 Cuero.
San Marcos Station
Flight Path Map
This map shows the direct air route between San Antonio and Port O'Connor. Straight-line distance: 143.11 mi (230.32 km).
#1 San Antonio
The seventh most populous city in the United States and the center of the San Antonio metropolitan area.
| Population | 1,567,118 |
| Coordinates | 29.4241200, -98.4936300 |
| Altitude | 198 |
| Country | United States |
#2 Port O'Connor
Port O'Connor is a place in Texas, United States.
| Population | 0 |
| Coordinates | 28.4483400, -96.4058100 |
| Altitude | 1 |
| Country | United States |
End: Port O'Connor (-96.40581, 28.44834)
Estimated Travel Time
Distance: 265 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 05h 28m |
| 40 mph (64.37 km/h) | 04h 06m |
| 50 mph (80.47 km/h) | 03h 17m |
| 60 mph (96.56 km/h) | 02h 44m |
| 70 mph (112.65 km/h) | 02h 20m |
| 80 mph (129 km/h) | 02h 03m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.78 | $21.92 | $43.84 |
| Mid-grade | $4.25 | $24.66 | $49.32 |
| Premium | $4.59 | $26.63 | $53.26 |
| Diesel | $3.99 | $23.16 | $46.32 |
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 29, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.