Traveling from Port Arthur to San Antonio covers 285.2 miles and typically requires about 4 hours and 16 minutes of travel time. Because this journey fits comfortably into a single day, you can easily complete the trip without needing an overnight stop. You will primarily navigate via Gulfway Drive, Dowling Road, and the 90th Infantry Division Highway as you traverse the Great Plains region. Budgeting approximately $42 for fuel will cover your transit costs for the duration of the drive. While the route is manageable, keep in mind that the local road profile makes it more hands-on than a simple highway cruise. It is a straightforward trip that rewards drivers who prefer local roads over the monotony of major interstates.
Trip Pace
Same-day drive is realistic
A same-day return is possible, but it will make for a full day on the road.
Break Rhythm
1 planned break
Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
Midpoint
141.6 miles from Port Arthur, TX
A natural place for your longest stop of the day
, about 2h 33m into the drive
.
Main Roads
Road
Distance
Duration
I 10
246.1 mi
4h 24m
TX 82
20.4 mi
21m
TX 73
7.2 mi
7m
East Commerce Street
4.3 mi
7m
Jose Lopez Freeway
1.6 mi
1m
Gulfway Drive
1.4 mi
2m
90th Infantry Division Highway
0.8 mi
<1m
Interstate 10 East
0.3 mi
<1m
Longest stretch:
I 10
— 246.1 mi, about 4h 24m
Turn-by-Turn Driving Directions
Step-by-step road directions between Port Arthur, TX and San Antonio, TX.
1
Start on Augusta Avenue
197 ft·7 sec·Augusta Avenue
2
Turn right onto TX 87
1.4 mi·2 min·Gulfway Drive
3
Continue on TX 87
0.3 mi·34 sec·Dowling Road
4
Turn right onto TX 82
20 mi·21 min·TX 82
Use the left lane.
5
Continue on TX 73
3.9 mi·3 min·TX 73
6
Turn straight onto TX 73
3.3 mi·3 min·TX 73
7
Merge onto I 10
234 mi·4 hr 11 min·I 10
Use the straight / slight right lanes.
8
Keep slight left at fork onto I 10; US 90; TX 130
12 mi·12 min·I 10; US 90; TX 130
Use the straight / slight right lanes.
9
Keep slight left at fork onto I 10; US 90; TX 130
0.8 mi·51 sec·90th Infantry Division Highway
Use the straight / slight right lanes.
10
Continue on I 10; US 90
1.6 mi·1 min·Jose Lopez Freeway
Use the straight / slight right lanes.
11
Take the exit
0.1 mi·19 sec
Exit 579Toward Commerce Street, Houston StreetUse the straight / slight right lanes.
12
Turn straight onto Interstate 10 East
0.3 mi·38 sec·Interstate 10 East
13
Turn right onto East Houston Street
0.2 mi·20 sec·East Houston Street
14
Turn slight left onto East Commerce Street
4.3 mi·7 min·East Commerce Street
15
Turn left onto Military Plaza
392 ft·15 sec·Military Plaza
16
Turn left onto Dolorosa Street
327 ft·8 sec·Dolorosa Street
17
Arrive at destination
Dolorosa Street
Trip Plan
To make the most of your 285.2-mile trek, plan for at least one dedicated stop to break up the technical nature of the local roads. Departing early helps you navigate the turns with better daylight visibility and less congestion. Since you are not restricted by high-speed highway segments, remain flexible with your pacing and use your stop to stretch after navigating the frequent turns. Keep your $42 fuel budget in mind when planning your refueling breaks along the way. Given the turn-heavy profile, ensure your vehicle is ready for frequent braking and steering adjustments to keep the 4-hour and 16-minute trip as comfortable as possible.
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.
You can normally do this drive in one day.
Plan roughly 1 meaningful break for fuel, food, and rest.
The halfway point lands around 141.6 miles from Port Arthur, TX, or about 2h 33m into the drive.
The longest continuous stretch on this route runs about 246.1 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 62 miles or 1h 7m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 141.6 miles or 2h 33m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 4h 10m
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 Arthur, 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 Arthur, TX
This is one driving day of about 283.1 miles and 5h 8m.
Your first comfortable stop window is around 62 miles from Port Arthur, 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 I 10 for about 246.1 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Place data sourced from public business listings. Hours and availability may vary.
Heads-up: tricky spots
5 of 9
5 decision points cluster between mile 29.5 and 283 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
5
29.5 mi into trip|~32m in|I 10
Merge onto I 10
Merge point - match speed before joining. Lane positioning matters here
Use the straight / slight right lanes.
6
263.6 mi into trip|~4h 44m in|I 10; US 90; TX 130
Keep slight left at fork onto I 10; US 90; TX 130
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight right lanes.
6
275.6 mi into trip|~4h 57m in|I 10; US 90; TX 130 / 90th Infantry Division Highway
Keep slight left at fork onto I 10; US 90; TX 130 / 90th Infantry Division Highway
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight right lanes.
8
278 mi into trip|~4h 59m in
Take the exit toward Commerce Street, Houston Street
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 579
Toward Commerce Street, Houston Street
5
283 mi into trip|~5h 8m in|Dolorosa Street
Turn left onto Dolorosa Street
Navigation decision point
Fuel & Cost
Regular Gas
$42.78 one way
$85.55 round trip
$3.84/gal25.4 MPG avg99 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.20
$46.82
$93.65
premium
$4.54
$50.55
$101.09
diesel
$5.61
$62.50
$125.01
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$43
Meals
$25–$50
Total
$68–$93
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 99.1 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $30 in charging
· 1 stop
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
84.9
1
$29.73
$13.59
Efficient EV
70.8
0
$24.77
$11.32
EV Truck/SUV
113.2
1
$39.63
$18.12
Gas CO2
99 kg
EV CO2
33 kg (67% less)
Plan for 1 charging stop. A 30-minute DC fast charge mid-route should be enough to complete the trip comfortably.
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.
Forecast as of Apr 16, 2026
Origin
Port Arthur, TX
Late night
in Port Arthur on Sunday
Local time
3:08 AM
CDT
Current temp
65°F
Unavailable
Live forecast
Destination
San Antonio, TX
Late night
in San Antonio on Sunday
Local time
3:08 AM
CDT
Current temp
90°F
Partly Sunny
SSE 10 mph0% chanceLive forecast
Red Flag Warning
Red Flag Warning issued April 16 at 12:44PM CDT until April 16 at 9:00PM CDT by NWS Amarillo TX
Red Flag Warning
Red Flag Warning issued April 16 at 12:44PM CDT until April 17 at 8:00PM CDT by NWS Amarillo TX
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
25 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
5h 8m on the road
An early start around 7-8 AM gets you there with plenty of daylight left.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
National Parks Near This Route
Worth a detour if your schedule allows.
San Antonio Missions National Historical Park
National Historical Park
Welcome to San Antonio Missions, a National Park Service site and the only UNESCO World Heritage Site in Texas. Each mission in the park is a center of community and has been since the early 1700s. Th...
9 mi from route
~22 min detour
Free
near mile 283.1
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
Expect a turn-heavy local drive rather than a high-speed interstate experience, as this route features a 0% highway share. Because the longest uninterrupted stretch is 0 miles on Gulfway Drive, you will encounter constant transitions and require consistent focus behind the wheel. The journey maintains a consistent, localized personality from start to finish, steering clear of long, straight highway stretches. You should prepare for a more engaging, technical drive that demands your attention at every turn. Navigating these specific local roads provides a different pace compared to typical long-distance travel, making it an ideal choice for those who enjoy active driving.
97% highway — fuel and pacing are the main things to plan.
17 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 246.1 mi on I 10.
How Hard Is This Drive?
6/10
This is a straightforward highway drive that stays mostly on I 10 and TX 82. You will hit about 9 points where you need to pay attention to lane position or signs. The trickiest moment comes around 29.5 miles in near I 10.
Driving Effort6/10
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 283.1 miles you will encounter 9 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 29.5 miles (I 10): Merge point - match speed before joining. Lane positioning matters here; at 263.6 miles (I 10; US 90; TX 130): Highway fork - watch signs carefully. Lane positioning matters here; at 275.6 miles (I 10; US 90; TX 130 / 90th Infantry Division Highway): Highway fork - watch signs carefully. Lane positioning matters here.
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.
Top landmarks
•Alamo Mission in San Antonio — historic place in San Antonio, Bexar County, Texas
•San Antonio Missions National Historical Park — historic district in San Antonio, Bexar County, Texas
•Fort Sam Houston — military base in San Antonio, Texas
Doable as a same-day drive at 5h 8m. Total distance: 283.1 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
5h 8m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (97%). Some complex stretches to watch for.
Frequently Asked Questions
The longest stretch is about 246.1 miles on I 10. The full list of main roads is in the Roads section above.
We did not find dedicated rest areas on this route. For a drive this long, plan bathroom and stretch breaks around gas stations, fast-food stops, or small-town downtowns — check the Nearby Places section for options.
It helps. This route has a higher-than-average number of complex decision points, which get harder in the dark. If the last hour of the trip is on surface roads or mountain grades, aim to arrive at San Antonio, TX before sunset when you can. Check the Trip Plan for departure windows that land you in daylight.
Only with planning. This is a long drive for kids — consider splitting it into two days rather than pushing through. Plan at least 1 meaningful breaks. Dedicated rest areas are limited, so plan gas or food stops as your bathroom breaks.
The main spots that need attention: at 29.5 miles (I 10): Merge point - match speed before joining. Lane positioning matters here; at 263.6 miles (I 10; US 90; TX 130): Highway fork - watch signs carefully. Lane positioning matters here; at 275.6 miles (I 10; US 90; TX 130 / 90th Infantry Division Highway): Highway fork - watch signs carefully. Lane positioning matters here.
Yes — San Antonio Missions National Historical Park. See the National Parks section for detour distances and tips on detours.
Not recommended in a single day. At 5.1 hours each way, a round trip means 10.3 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at San Antonio, TX before the return drive.
