Drive Time
3h 26m
Distance
222.8 mi
358 km
Drive Score
8/10
Great drive
Same Day?
Yes, doable
Fuel Cost
$33
one way
Photo: Mark Direen
The drive from Porter Heights, TX to San Antonio, TX covers 222.8 miles and takes about 3h 26m behind the wheel. This route is realistic as a one-day drive if you keep your stops efficient.
The route leans on Porter Lane, FM 1314, TX 99 for much of the mileage, and the overall profile is turn-heavy local drive. At current regular gas prices, budget about $33.15 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
111.4 miles from Porter Heights, TX
A natural place for your longest stop of the day , about 1h 43m into the drive .
Expect a 3h 26m drive with frequent turns across 222.8 miles of local and secondary roads.
| Road | Distance | Duration |
|---|---|---|
| Porter Lane | Unavailable | Refreshing |
| FM 1314 | Unavailable | Refreshing |
| TX 99 | Unavailable | Refreshing |
| North Grand Parkway East | Unavailable | Refreshing |
| I 10 East | Unavailable | Refreshing |
| I 10 West | Unavailable | Refreshing |
| Katy Freeway | Unavailable | Refreshing |
| 90th Infantry Division Highway | Unavailable | Refreshing |
Per-road distance and duration are being refreshed from OSRM for this route.
Step-by-step road directions between Porter Heights, TX and San Antonio, TX.
Start on the route
At the end of the road, turn right onto Porter Lane
Turn right onto FM 1314
Take the ramp slight right toward TX 99 Toll West
Merge slight left onto North Grand Parkway East
Take the exit slight right toward I 10 East, I 10 West: Houston, San Antonio
Keep slight right to continue on I 10 West: San Antonio
Merge slight left onto Katy Freeway
Keep slight left
Keep slight left to continue on 90th Infantry Division Highway
Continue on Jose Lopez Freeway
Take the exit slight right toward Commerce Street, Houston Street
Turn straight onto Interstate 10 East
Turn right onto East Houston Street
Turn slight left onto East Commerce Street
Turn left onto Military Plaza
Turn left onto Dolorosa Street
Arrive at your destination
Morning Departure
An early start around 7-8 AM gets you there with plenty of daylight left.
Evening Departure
A late afternoon start means arriving after dark. Morning is better.
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 80 miles or 1h 14m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 111.4 miles or 1h 43m 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 49m
Traffic, exits, and arrival timing usually matter more near San Antonio, TX than in the middle of the route.
Open the route before leaving Porter Heights, 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 Porter Heights, TX
This is one driving day of about 222.8 miles and 3h 26m.
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 111.4 mi from Porter Heights, TX · 1h 43m into the drive
Mid-route town
Meal stop
111 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.
A short stop after about 80 miles helps settle the day before fatigue starts building.
The midpoint is around 111.4 miles from Porter Heights, TX, which is a good place for a longer meal and fuel stop.
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.
Regular Gas
$33.15 one way
$66.30 round trip
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.25 | $37.30 | $74.59 |
| premium | $4.59 | $40.27 | $80.54 |
| diesel | $3.99 | $35.03 | $70.05 |
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$33
Meals
$25–$50
Total
$58–$83
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 78 kg one way.
Driving Electric?
About $23 in charging · 0 stops · 67% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 66.8 | 0 | $23.39 | $10.69 |
| Efficient EV | 55.7 | 0 | $19.50 | $8.91 |
| EV Truck/SUV | 89.1 | 1 | $31.19 | $14.26 |
Gas CO2
78 kg
EV CO2
26 kg (67% less)
Plan for 0 charging stops, roughly every 270 miles. Allow 25-40 minutes per stop at a DC fast charger.
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. If you're planning ahead, check the forecast closer to your travel date.
Origin
Morning in Porter Heights on Saturday
Local time
10:39 AM
CDT
Current temp
87°F
Forecast unavailable right now
Destination
Morning in San Antonio on Saturday
Local time
10:39 AM
CDT
Current temp
81°F
Forecast unavailable right now
Along the Route
70°F
Houston, TX
111 mi in
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
Origin and destination are on the same clock, so arrival timing is easier to judge at a glance.
Temperature spread
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
Use the two city cards together: check the sky where you start, then compare it with the local time and temperature at arrival.
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Return Trip
San Antonio, TX to Porter Heights, TXPlan the drive back the other way.
Explore more options from Porter Heights, TX or browse trips ending in San Antonio, TX.
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