Origin
Port Lavaca, TX
Night in Port Lavaca on Friday
Local time
10:31 PM
CDT
Current temp
69°F
Unavailable
Live forecast
Trip from Port Lavaca, TX to San Antonio, TX
Compiled and reviewed by the Trip.ovh planning team at COD Solutions Oy · Last reviewed Apr 18, 2026 · Editorial standards
Drive Time
2h 51m
Distance
141.7 mi
228 km
Drive Score
8/10
Great drive
Same Day?
Yes, doable
Fuel Cost
$21
one way
EV Charging
Unknown
Best Time to Leave
4 AM
2h 40m
★
6 AM
2h 51m
8 AM
3h 13m
10 AM
2h 59m
12 PM
2h 57m
3 PM
3h 0m
5 PM
3h 12m
8 PM
2h 45m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Port Lavaca, TX
Wikimedia Commons
San Antonio, TX
Wikimedia Commons
Trip Overview
The drive from Port Lavaca, TX to San Antonio, TX covers 141.7 miles and takes about 2h 51m behind the wheel. This route is realistic as a one-day drive if you keep your stops efficient.
The route leans on US 87, US Highway 87 North, East Main Street for much of the mileage, and the overall profile is highway-focused drive. The longest uninterrupted segment is about 97.3 miles on US 87. At current regular gas prices, budget about $21.41 one way before food or hotel costs.
Trip Pace
Same-day drive is realistic
A same-day return is realistic if you keep stops short.
Break Rhythm
1 planned break
A short stop every 2 to 3 hours is enough for this drive.
Midpoint
70.9 miles from Port Lavaca, TX
A natural place for your longest stop of the day , about 1h 25m into the drive .
About the Cities
Arriving in San Antonio, TX
Full guide →San Antonio is the second largest city in the state of Texas and the 7th largest in the United States. It's the 24th largest metropolitan area in the country. Visited by more than 31 million annual visitors, San Antonio is a beautiful city at the axis of three different geological terrains: Hill Country, South Texas Plains and Prairie and Lakes. There's a lot to do in this city: fine art museums, historical missions and plenty of amusement parks in addition to great dining and lots of drinking. The culture and people are vibrant and interesting. San Antonio's downtown is one of the most lively in the nation.
City content from Wikivoyage (CC BY-SA 4.0) and Wikidata (CC0).
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 2h 51m. Total distance: 141.7 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
2h 51m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (86%). Some complex stretches to watch for.
Drive Character
This is a 2h 51m highway drive covering 141.7 miles, with most of the trip on US 87 and US Highway 87 North. The longest continuous stretch is about 97.3 miles on US 87.
Most of the miles stay on highways, which makes pacing and fuel planning easier than turn-by-turn city driving.
There are about 22 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
US 87 is the longest continuous segment at about 97.3 miles.
How Hard Is This Drive?
This is a straightforward highway drive that stays mostly on US 87 and US Highway 87 North. You will hit about 12 points where you need to pay attention to lane position or signs. The trickiest moment comes around 136.8 miles in near US 87.
Driving Effort
6/10
Moderate - straightforward overall, but long enough or busy enough to require pacing
Balances navigation complexity with total wheel time.
This drive requires moderate attention. Across 141.7 miles you will encounter 12 spots where lane choice or exit timing matters. Not difficult for experienced highway drivers, but worth previewing the tricky sections before you go.
Where does it get tricky?
The main spots that need attention: at 136.8 miles (US 87): Lane positioning matters here. Multiple destination signs - pick the right one; at 137 miles (I 10; US 87; US 90 / Jose Lopez Freeway): Merge point - match speed before joining. Lane positioning matters here; at 138.7 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one.
Critical Maneuvers
5 of 12 key pointsThese are the spots where you need to pay the most attention. Preview them before you drive.
7
136.8 mi into trip
|
~2h 43m in
|
US 87
Turn left onto US 87 toward I 10 West, US 90 West
Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / left lanes.
Toward I 10 West, US 90 West
5
137 mi into trip
|
~2h 44m in
|
I 10; US 87; US 90 / Jose Lopez Freeway
Merge onto I 10; US 87; US 90 / Jose Lopez Freeway
Merge point - match speed before joining. Lane positioning matters here
Use the straight / slight right lanes.
8
138.7 mi into trip
|
~2h 45m in
Take the exit toward I 37, US 281: Corpus Christi, Johnson City
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight right lane.
Exit 574
Toward I 37, US 281: Corpus Christi, Johnson Ci...
8
138.8 mi into trip
|
~2h 46m in
Keep slight right at fork toward I 37 North, US 281 North: Johnson City
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight right lane.
Toward I 37 North, US 281 North: Johnson City
8
140.4 mi into trip
|
~2h 48m in
Take the exit toward Commerce Street, Downtown, The Alamo
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / slight right lanes.
Exit 141
Toward Commerce Street, Downtown, The Alamo
Main Roads
| Road | Distance | Duration |
|---|---|---|
| US 87 | 97.3 mi | 1h 55m |
| US Highway 87 North | 22.1 mi | 25m |
| East Main Street | 6.1 mi | 7m |
| North Main Street | 3.9 mi | 6m |
| West Heaton Street | 3.9 mi | 4m |
| East Broadway Street | 1.7 mi | 2m |
| Jose Lopez Freeway | 1.6 mi | 1m |
| William J Bordelon Freeway | 1.2 mi | 1m |
Longest stretch:
US 87
— 97.3 mi, about 1h 55m
Turn-by-Turn Driving Directions
Step-by-step road directions between Port Lavaca, TX and San Antonio, TX.
1
Start on US 87
6.1 mi
·
7 min
·
East Main Street
2
Turn straight onto US 87
21 mi
·
24 min
·
US 87
3
Turn right onto US 87
0.5 mi
·
50 sec
·
North Navarro Street
4
Turn left onto US 87; US 59 Bus; US 77 Bus
0.2 mi
·
19 sec
·
East Rio Grande Street
5
Turn right onto US 87
3.9 mi
·
6 min
·
North Main Street
6
Continue on US 87
22 mi
·
25 min
·
US Highway 87 North
7
Continue on US 87
1.7 mi
·
2 min
·
East Broadway Street
8
Turn left onto US 77 Alt; US 87; US 183
0.7 mi
·
59 sec
·
South Esplanade Street
9
Turn right onto TX 72
3.9 mi
·
4 min
·
West Heaton Street
10
Turn right onto US 87
76 mi
·
1 hr 29 min
·
US 87
11
Turn slight right onto US 87
0.6 mi
·
1 min
·
Roland Avenue
12
Turn left onto US 87
0.2 mi
·
30 sec
·
US 87
Toward I 10 West, US 90 West
Use the straight / left lanes.
13
Merge onto I 10; US 87; US 90
1.6 mi
·
1 min
·
Jose Lopez Freeway
Use the straight / slight right lanes.
14
Take the exit
0.1 mi
·
15 sec
Exit 574
Toward I 37, US 281: Corpus Christi, Johnson City
Use the slight right lane.
15
Keep slight right at fork
0.4 mi
·
45 sec
Toward I 37 North, US 281 North: Johnson City
Use the slight right lane.
16
Merge onto I 37; US 281
1.2 mi
·
1 min
·
William J Bordelon Freeway
17
Take the exit
0.3 mi
·
33 sec
Exit 141
Toward Commerce Street, Downtown, The Alamo
Use the straight / slight right lanes.
18
Turn straight onto Interstate 37 South
380 ft
·
11 sec
·
Interstate 37 South
19
Turn left onto East Commerce Street
0.9 mi
·
1 min
·
East Commerce Street
20
Turn left onto Military Plaza
392 ft
·
15 sec
·
Military Plaza
21
Turn left onto Dolorosa Street
327 ft
·
8 sec
·
Dolorosa Street
22
Arrive at destination
Dolorosa Street
Trip Plan
Morning Departure
Leave by 9 AM and you'll arrive before lunch.
Evening Departure
Even a 4 PM departure gets you there before dark in summer.
You can normally do this drive in one day.
Plan roughly 1 meaningful break for fuel, food, and rest.
The halfway point lands around 70.9 miles from Port Lavaca, TX, or about 1h 25m into the drive.
The longest continuous stretch on this route runs about 97.3 miles.
This is a comfortable same-day trip.
Departure
Before you leave
Start with fuel, water, and navigation already sorted so the first hour feels easy.
First stop
Around 31 miles or 39m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 70.9 miles or 1h 25m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 2h 18m
Traffic, exits, and arrival timing usually matter more near San Antonio, TX than in the middle of the route.
Before You Leave
+
Open the route before leaving Port Lavaca, TX so your first major turns are already loaded.
+
Leave with enough water and a charging cable within reach, not packed away.
+
Check your fuel range against the first long segment, especially if you are starting outside city service areas.
Day 1
Settle into the route from Port Lavaca, TX
This is one driving day of about 141.7 miles and 2h 51m.
Your first comfortable stop window is around 31 miles from Port Lavaca, TX.
This route can stay practical as a one-day drive if traffic stays reasonable.
Plan about 1 real break rather than only quick fuel stops.
The longest stretch is on US 87 for about 97.3 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 70.9 mi from Port Lavaca, TX · 1h 25m into the drive
Mid-route town
Meal stop
71 mi into the route
Best for: Lunch, fuel, and a longer reset
This sits close to the middle of the route, so it works well for the longest stop of the day.
Pacing Suggestions
Fuel and coffee
A short stop after about 31 miles helps settle the day before fatigue starts building.
Meal break
The midpoint is around 70.9 miles from Port Lavaca, TX, which is a good place for a longer meal and fuel stop.
Before the longest stretch
Fuel checkTop up before US 87 if your tank is already low. That segment runs about 97.3 miles.
Arriving in San Antonio, TX
The final approach into San Antonio, TX usually feels slower than the middle of the drive, so avoid planning your tightest schedule at the very end.
Try to arrive with enough fuel left to skip an immediate station stop unless you already know the area around San Antonio, TX.
These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.
Fuel & Cost
Regular Gas
$21.41 one way
$42.82 round trip
$3.84/gal
25.4 MPG avg
50 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.20 | $23.44 | $46.87 |
| premium | $4.54 | $25.30 | $50.60 |
| diesel | $5.61 | $31.29 | $62.57 |
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$21
Meals
$25–$50
Total
$46–$71
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 49.6 kg one way. Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $15 in charging · 0 stops · 66% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 42.5 | 0 | $14.88 | $6.80 |
| Efficient EV | 35.4 | 0 | $12.40 | $5.67 |
| EV Truck/SUV | 56.7 | 0 | $19.84 | $9.07 |
Gas CO2
50 kg
EV CO2
17 kg (66% less)
This trip is well within single-charge range for most EVs. No charging stops needed if you start fully charged.
DC fast charging avg $0.35/kWh. Home charging avg $0.16/kWh. US grid CO2: 0.39 kg/kWh.
Travel Intel
Current conditions at both ends of the drive.
Destination
San Antonio, TX
Night in San Antonio on Friday
Local time
10:31 PM
CDT
Current temp
77°F
Unavailable
Live forecast
Seasonal Notes
Summer travel usually means heavier construction, hotter rest stops, and busier weekend traffic around major cities.
Winter travel shortens daylight, so a route that looks manageable on paper can feel much longer after dark.
Holiday weekends tend to make both departure and arrival windows slower than the raw route time suggests.
Time zone
Same local time
Origin and destination are on the same clock, so arrival timing is easier to judge at a glance.
Temperature spread
8 degrees warmer at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
2h 51m on the road
Use the two city cards together: check the sky where you start, then compare it with the local time and temperature at arrival.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
Frequently Asked Questions
The drive from Port Lavaca, TX to San Antonio, TX covers 141.7 miles and takes about 2h 51m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are US 87, US Highway 87 North, East Main Street. Most of the drive stays on highways, so watch for ramps and exits.
This is a comfortable same-day trip.
The midpoint is about 70.9 miles from Port Lavaca, TX. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $21.41 one way. This estimate uses 25.4 MPG — your actual cost will vary with your vehicle's fuel efficiency and current gas prices.
Leave by 9 AM and you'll arrive before lunch. Even a 4 PM departure gets you there before dark in summer.
Plan about 1 meaningful break for fuel, food, or rest. A short stop every 2 to 3 hours is enough for this drive.
This drive requires moderate attention. Across 141.7 miles you will encounter 12 spots where lane choice or exit timing matters. Not difficult for experienced highway drivers, but worth previewing the tricky sections before you go.
The main spots that need attention: at 136.8 miles (US 87): Lane positioning matters here. Multiple destination signs - pick the right one; at 137 miles (I 10; US 87; US 90 / Jose Lopez Freeway): Merge point - match speed before joining. Lane positioning matters here; at 138.7 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one.
The route from Port Lavaca, TX to San Antonio, TX does not surface many named destination signs beyond the main corridor.
How this page is built
Compiled by the Trip.ovh planning team at COD Solutions Oy from open government datasets — OSRM over OpenStreetMap for geometry, and EIA for fuel prices. See our methodology for refresh cadence and limitations.
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