How far is Port Aransas, TX from San Antonio, TX?
The driving distance from Port Aransas, TX to San Antonio, TX is about 178.5 miles (287.3 km), with a travel time of about 02h 45m by car.
- The straight-line flight distance is about 140.1 miles (225.4 km).
- For a round trip, plan for roughly 05h 31m 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 45m.
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 Texas, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Showers And Thunderstorms
Sunny
Driving Route Map
The map below follows the saved road route between Port Aransas and San Antonio.
Turn-by-Turn Driving Directions
Step-by-step road directions between Port Aransas and San Antonio.
-
1
Start on the route
9 m · 4 sec
-
2
Turn right onto Church Street
19 m · 5 sec · Church Street
-
3
Turn right onto Beach Street
86 m · 10 sec · Beach Street
-
4
At the end of the road, turn left onto North Alister Street
682 ft · 21 sec · North Alister Street
-
5
Turn right onto West Avenue A
2562 ft · 1 min · West Avenue A
-
6
Turn slight right
1155 ft · 22 sec
-
7
Continue on Aransas Pass - Port Aransas, Mustang Island
1593 ft · 5 min · Aransas Pass - Port Aransas, Mustang Island
-
8
Continue straight
6.6 mi · 10 min
-
9
Turn right onto Harrison Boulevard
2313 ft · 46 sec · Harrison Boulevard
-
10
Continue on West Wheeler Avenue
1.9 mi · 4 min · West Wheeler Avenue
-
11
Turn right onto FM 1069 North
1294 ft · 30 sec · FM 1069 North
-
12
Take the ramp left
2308 ft · 1 min
-
13
Merge slight left onto State Highway 35 Bypass
5.9 mi · 7 min · State Highway 35 Bypass
-
14
Take the exit slight right toward US 181, TX 361, North
1979 ft · 48 sec
-
15
Keep slight right
1009 ft · 25 sec
-
16
Turn straight
1.5 mi · 3 min
-
17
Take the ramp straight
2101 ft · 51 sec
-
18
Merge slight left onto US Highway 181
5.3 mi · 6 min · US Highway 181
-
19
Continue on Railroad Avenue
1.3 mi · 2 min · Railroad Avenue
-
20
Continue on US Highway 181
6 mi · 7 min · US Highway 181
-
21
Continue on State Highway 89
2.7 mi · 3 min · State Highway 89
-
22
Take the exit left
1755 ft · 43 sec
-
23
Merge slight left
1.2 mi · 1 min
-
24
Take the exit slight right toward Texas 188: Sinton
2309 ft · 1 min
-
25
Turn right
15 mi · 19 min
-
26
Turn right onto I-37 Access Road
1127 ft · 23 sec · I-37 Access Road
-
27
Take the ramp slight left
939 ft · 23 sec
-
28
Merge slight left
110 mi · 1 hr 52 min
-
29
Take the exit slight right toward Commerce Street, Downtown, The Alamo
1358 ft · 33 sec
-
30
Turn straight onto Interstate 37 South
116 m · 12 sec · Interstate 37 South
-
31
Turn left onto East Commerce Street
1.4 km · 2 min · East Commerce Street
-
32
Turn left onto Military Plaza
119 m · 16 sec · Military Plaza
-
33
Turn left onto Dolorosa Street
100 m · 8 sec · Dolorosa Street
-
34
Arrive at your destination
0 m · 1 sec · Dolorosa Street
Car Route Details
A richer read on the saved driving route between Port Aransas and San Antonio.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
I-37 Access Road
Merge slight left
110 mi · 01h 52m
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.
Showers And Thunderstorms leaving Port Aransas and 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 Aransas to San Antonio?
The road trip is about 178.5 miles (287.3 km) and usually takes 02h 45m 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?
George West is a useful midpoint, sitting about 81.8 miles from Port Aransas and 96.8 miles from San Antonio.
How much longer is the road route than the straight-line distance?
The direct path is about 140.1 miles (225.4 km), while the road route adds roughly 38.4 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 12:58 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $23.81 one way or $47.62 round trip. Estimated CO2 is about 56 kg one way.
What should you check before leaving?
Before you leave, expect Showers And Thunderstorms around Port Aransas and Sunny near San Antonio.
Flight Path Map
This map shows the direct air route between Port Aransas and San Antonio. Straight-line distance: 140.06 mi (225.41 km).
#1 Port Aransas
City in Texas, United States
| Population | 4,409 |
| Coordinates | 27.8339200, -97.0611000 |
| 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: 287 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 05h 56m |
| 40 mph (64.37 km/h) | 04h 27m |
| 50 mph (80.47 km/h) | 03h 34m |
| 60 mph (96.56 km/h) | 02h 58m |
| 70 mph (112.65 km/h) | 02h 33m |
| 80 mph (129 km/h) | 02h 13m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.78 | $23.81 | $47.62 |
| Mid-grade | $4.25 | $26.79 | $53.58 |
| Premium | $4.59 | $28.92 | $57.85 |
| Diesel | $3.99 | $25.16 | $50.31 |
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 28, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.