How far is Port O'Connor, TX from San Antonio, TX?
The driving distance from Port O'Connor, TX to San Antonio, TX is about 164.7 miles (265.1 km), with a travel time of about 03h 06m by car.
- The straight-line flight distance is about 143.1 miles (230.3 km).
- For a round trip, plan for roughly 06h 12m 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 06m.
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.
Haze then Mostly Sunny
Partly Sunny then Chance Showers And Thunderstorms
Driving Route Map
The map below follows the saved road route between Port O'Connor and San Antonio.
Turn-by-Turn Driving Directions
Step-by-step road directions between Port O'Connor and San Antonio.
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1
Start on 2nd Street
28 m · 8 sec · 2nd Street
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2
Turn left onto Adams Avenue
1.5 km · 2 min · Adams Avenue
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3
Continue on State Highway 185 East
6.9 mi · 12 min · State Highway 185 East
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4
Turn right
11.2 mi · 20 min
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5
Turn right onto State Highway 238
1.4 km · 2 min · State Highway 238
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6
At the end of the road, turn left
3.2 mi · 6 min
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7
Turn left onto Alcoa Drive
1.3 km · 2 min · Alcoa Drive
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8
At the end of the road, turn left
4.9 mi · 6 min
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9
Turn straight
20.9 mi · 25 min
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10
Turn right onto North Navarro Street
2462 ft · 51 sec · North Navarro Street
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11
Turn left onto East Rio Grande Street
1163 ft · 20 sec · East Rio Grande Street
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12
Turn right onto North Main Street
3.9 mi · 6 min · North Main Street
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13
Continue on US Highway 87 North
22.1 mi · 25 min · US Highway 87 North
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14
Continue on East Broadway Street
1.7 mi · 2 min · East Broadway Street
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15
Turn left onto South Esplanade Street
1.2 km · 60 sec · South Esplanade Street
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16
Turn right onto West Heaton Street
3.9 mi · 4 min · West Heaton Street
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17
Turn right
76.2 mi · 1 hr 30 min
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18
Turn slight right onto Roland Avenue
3196 ft · 1 min · Roland Avenue
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19
Turn left onto I 10 West, US 90 West
1271 ft · 31 sec
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20
Merge slight left onto Jose Lopez Freeway
1.6 mi · 2 min · Jose Lopez Freeway
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21
Take the exit slight right toward I 37, US 281: Corpus Christi, Johnson City
644 ft · 16 sec
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22
Keep slight right to continue on I 37 North, US 281 North: Johnson City
1883 ft · 46 sec
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23
Merge slight left onto William J Bordelon Freeway
1.2 mi · 1 min · William J Bordelon Freeway
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24
Take the exit slight right toward Commerce Street, Downtown, The Alamo
1358 ft · 33 sec
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25
Turn straight onto Interstate 37 South
116 m · 12 sec · Interstate 37 South
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26
Turn left onto East Commerce Street
1.4 km · 2 min · East Commerce Street
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27
Turn left onto Military Plaza
119 m · 16 sec · Military Plaza
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28
Turn left onto Dolorosa Street
100 m · 8 sec · Dolorosa Street
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29
Arrive at your destination
0 m · 1 sec · Dolorosa Street
Car Route Details
A richer read on the saved driving route between Port O'Connor and San Antonio.
Straightforward drive
The saved road route has a manageable number of maneuvers and should be easy to follow with normal attention to signs.
Longest stretch
Turn right
76.2 mi · 01h 30m
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.
Haze then Mostly Sunny leaving Port O'Connor and Partly Sunny then Chance Showers And Thunderstorms near San Antonio.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Port O'Connor to San Antonio?
The road trip is about 164.7 miles (265.1 km) and usually takes 03h 06m 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 82.3 miles from Port O'Connor and 82.5 miles from San Antonio.
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 21.6 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 10:48 AM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $21.96 one way or $43.91 round trip. Estimated CO2 is about 51.6 kg one way.
What should you check before leaving?
Before you leave, expect Haze then Mostly Sunny around Port O'Connor and Partly Sunny then Chance Showers And Thunderstorms near San Antonio.
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 Port O'Connor and San Antonio. Straight-line distance: 143.11 mi (230.32 km).
#1 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 |
#2 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 |
End: Dolorosa Street (-98.493645, 29.424163)
Estimated Travel Time
Distance: 265 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 05h 29m |
| 40 mph (64.37 km/h) | 04h 07m |
| 50 mph (80.47 km/h) | 03h 17m |
| 60 mph (96.56 km/h) | 02h 44m |
| 70 mph (112.65 km/h) | 02h 21m |
| 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 | $21.96 | $43.91 |
| Mid-grade | $4.25 | $24.70 | $49.41 |
| Premium | $4.59 | $26.67 | $53.35 |
| Diesel | $3.99 | $23.20 | $46.40 |
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.