How far is Port Arthur, TX from San Antonio, TX?
The driving distance from Port Arthur, TX to San Antonio, TX is about 285.2 miles (459 km), with a travel time of about 04h 16m by car.
- The straight-line flight distance is about 275.1 miles (442.7 km).
- For a round trip, plan for roughly 08h 33m 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 04h 16m.
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.
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Port Arthur and San Antonio.
Turn-by-Turn Driving Directions
Step-by-step road directions between Port Arthur and San Antonio.
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1
Start on Augusta Avenue
60 m · 8 sec · Augusta Avenue
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2
Turn right onto Gulfway Drive
1.4 mi · 3 min · Gulfway Drive
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3
Continue on Dowling Road
1821 ft · 35 sec · Dowling Road
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4
Turn right
20.4 mi · 22 min
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5
Continue straight
3.9 mi · 4 min
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6
Turn straight
3.3 mi · 4 min
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7
Merge slight left
234.1 mi · 4 hr 11 min
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8
Keep slight left
12 mi · 13 min
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9
Keep slight left to continue on 90th Infantry Division Highway
1.2 km · 52 sec · 90th Infantry Division Highway
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10
Continue on Jose Lopez Freeway
1.6 mi · 2 min · Jose Lopez Freeway
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11
Take the exit slight right toward Commerce Street, Houston Street
790 ft · 19 sec
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12
Turn straight onto Interstate 10 East
1830 ft · 39 sec · Interstate 10 East
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13
Turn right onto East Houston Street
963 ft · 20 sec · East Houston Street
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14
Turn slight left onto East Commerce Street
4.3 mi · 7 min · East Commerce Street
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15
Turn left onto Military Plaza
119 m · 16 sec · Military Plaza
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16
Turn left onto Dolorosa Street
100 m · 8 sec · Dolorosa Street
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17
Arrive at your destination
0 m · 1 sec · Dolorosa Street
Car Route Details
A richer read on the saved driving route between Port Arthur 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.
Dowling Road
Merge slight left
234 mi · 04h 11m
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.
Sunny leaving Port Arthur and Mostly 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 Arthur to San Antonio?
The road trip is about 285.2 miles (459 km) and usually takes 04h 16m 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?
Sealy is a useful midpoint, sitting about 141.3 miles from Port Arthur and 143.9 miles from San Antonio.
How much longer is the road route than the straight-line distance?
The direct path is about 275.1 miles (442.7 km), while the road route adds roughly 10.1 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 6:00 AM to 8:00 AM CDT. If you want a more comfortable same-day return, try to leave by 8:26 AM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $38.02 one way or $76.03 round trip. Estimated CO2 is about 89.4 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Port Arthur and Mostly Sunny near San Antonio.
Stop Ideas Near Sealy
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 Sealy.
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Flight Path Map
This map shows the direct air route between Port Arthur and San Antonio. Straight-line distance: 275.11 mi (442.74 km).
#1 Port Arthur
The most populous city in Jefferson County, Texas.
| Population | 53,921 |
| Coordinates | 29.8851900, -93.9423300 |
| Altitude | 2 |
| 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: 459 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 09h 30m |
| 40 mph (64.37 km/h) | 07h 07m |
| 50 mph (80.47 km/h) | 05h 42m |
| 60 mph (96.56 km/h) | 04h 45m |
| 70 mph (112.65 km/h) | 04h 04m |
| 80 mph (129 km/h) | 03h 33m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.78 | $38.02 | $76.03 |
| Mid-grade | $4.25 | $42.78 | $85.55 |
| Premium | $4.59 | $46.19 | $92.37 |
| Diesel | $3.99 | $40.17 | $80.34 |
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 13, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.