How far is Port Lavaca, TX from San Antonio, TX?
The driving distance from Port Lavaca, TX to San Antonio, TX is about 146.1 miles (235.1 km), with a travel time of about 02h 34m by car.
- The straight-line flight distance is about 126 miles (202.7 km).
- For a round trip, plan for roughly 05h 08m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 8:00 AM to 10:00 AM CDT.
Reverse, save, or send this route
This route works well as a day trip with time at the destination. Copy the route link, send it to another device, or print a clean version before you head out.
This route works well as a day trip with time at the destination.
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 02h 34m.
A morning start gives you useful time at the destination and keeps the return out of the late evening.
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 Gonzales County, Texas, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Partly Sunny
Partly Sunny
Driving Route Map
The map below follows the saved road route between Port Lavaca and San Antonio.
Turn-by-Turn Driving Directions
Step-by-step road directions between Port Lavaca and San Antonio.
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1
Start on East Main Street
6.1 mi · 8 min · East Main Street
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2
Turn straight
20.9 mi · 25 min
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3
Turn right onto North Navarro Street
2462 ft · 51 sec · North Navarro Street
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4
Turn left onto East Rio Grande Street
1163 ft · 20 sec · East Rio Grande Street
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5
Turn right onto North Main Street
3.9 mi · 6 min · North Main Street
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6
Continue on US Highway 87 North
22.1 mi · 25 min · US Highway 87 North
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7
Continue on East Broadway Street
1.7 mi · 2 min · East Broadway Street
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8
Turn left onto South Esplanade Street
1.2 km · 60 sec · South Esplanade Street
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9
Turn right onto West Heaton Street
3.9 mi · 4 min · West Heaton Street
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10
Turn right
76.2 mi · 1 hr 30 min
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11
Turn slight right onto Roland Avenue
3196 ft · 1 min · Roland Avenue
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12
Turn left onto I 10 West, US 90 West
1271 ft · 31 sec
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13
Merge slight left onto Jose Lopez Freeway
1.6 mi · 2 min · Jose Lopez Freeway
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14
Take the exit slight right toward I 37, US 281: Corpus Christi, Johnson City
644 ft · 16 sec
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15
Keep slight right to continue on I 37 North, US 281 North: Johnson City
1883 ft · 46 sec
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16
Merge slight left onto William J Bordelon Freeway
1.2 mi · 1 min · William J Bordelon Freeway
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17
Take the exit slight right toward Commerce Street, Downtown, The Alamo
1358 ft · 33 sec
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18
Turn straight onto Interstate 37 South
116 m · 12 sec · Interstate 37 South
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19
Turn left onto East Commerce Street
1.4 km · 2 min · East Commerce Street
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20
Turn left onto Military Plaza
119 m · 16 sec · Military Plaza
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21
Turn left onto Dolorosa Street
100 m · 8 sec · Dolorosa Street
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22
Arrive at your destination
0 m · 1 sec · Dolorosa Street
Car Route Details
A richer read on the saved driving route between Port Lavaca 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 comfortable day-trip route
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
Partly Sunny leaving Port Lavaca and Partly Sunny near San Antonio.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Port Lavaca to San Antonio?
The road trip is about 146.1 miles (235.1 km) and usually takes 02h 34m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
What is the halfway point on this route?
Smiley is a useful midpoint, sitting about 70.8 miles from Port Lavaca and 75.2 miles from San Antonio.
How much longer is the road route than the straight-line distance?
The direct path is about 126 miles (202.7 km), while the road route adds roughly 20.1 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 8:00 AM to 10:00 AM CDT. If you want a more comfortable same-day return, try to leave by 1:22 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $19.46 one way or $38.92 round trip. Estimated CO2 is about 45.8 kg one way.
What should you check before leaving?
Before you leave, expect Partly Sunny around Port Lavaca and Partly Sunny near San Antonio.
Stop Ideas Near Smiley
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 Smiley.
San Marcos Station
San Antonio Station
Austin
Flight Path Map
This map shows the direct air route between Port Lavaca and San Antonio. Straight-line distance: 125.92 mi (202.65 km).
#1 Port Lavaca
City in Texas, United States
| Population | 11,671 |
| Coordinates | 28.6150000, -96.6260900 |
| Altitude | 4 |
| 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: 235 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 04h 52m |
| 40 mph (64.37 km/h) | 03h 39m |
| 50 mph (80.47 km/h) | 02h 55m |
| 60 mph (96.56 km/h) | 02h 26m |
| 70 mph (112.65 km/h) | 02h 05m |
| 80 mph (129 km/h) | 01h 49m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.78 | $19.46 | $38.92 |
| Mid-grade | $4.25 | $21.90 | $43.80 |
| Premium | $4.59 | $23.64 | $47.29 |
| Diesel | $3.99 | $20.56 | $41.13 |
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 30, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.