How far is San Carlos, TX from Austin, TX?
The driving distance from San Carlos, TX to Austin, TX is about 323 miles (519.8 km), with a travel time of about 04h 54m by car.
- The straight-line flight distance is about 275.1 miles (442.8 km).
- For a round trip, plan for roughly 09h 49m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 8:00 AM CST.
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 54m.
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 Live Oak County, Texas, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Showers And Thunderstorms Likely
Mostly Cloudy
Driving Route Map
The map below follows the saved road route between San Carlos and Austin.
Turn-by-Turn Driving Directions
Step-by-step road directions between San Carlos and Austin.
-
1
Start on the route
1.2 mi · 2 min
-
2
Turn right onto Richardson Road
1.5 km · 1 min · Richardson Road
-
3
Continue on East Schunior Street
2604 ft · 40 sec · East Schunior Street
-
4
Continue on East Richardson Street
1.4 km · 1 min · East Richardson Street
-
5
Continue on East Richardson Road
1.2 mi · 2 min · East Richardson Road
-
6
Turn right onto North Expressway 281
55 m · 4 sec · North Expressway 281
-
7
Take the ramp slight left toward I 69C North, US 281 North
1438 ft · 35 sec
-
8
Merge slight left
71.5 mi · 1 hr 16 min
-
9
Keep slight right
70.2 mi · 1 hr 20 min
-
10
Keep slight left to continue on Nueces Street
14.7 mi · 19 min · Nueces Street
-
11
Continue straight
1199 ft · 16 sec
-
12
Take the exit straight
60.8 mi · 1 hr 2 min
-
13
Take the exit slight right toward I 410, TX 130, US 281 South
971 ft · 24 sec
-
14
Keep slight right to continue on I 410 North, TX 130 North
2383 ft · 58 sec
-
15
Merge slight left onto Connally Loop
10.6 mi · 12 min · Connally Loop
-
16
Merge slight left onto North Pan Am Expressway
2.8 mi · 3 min · North Pan Am Expressway
-
17
Keep slight left to continue on North Pan Am Expressway
7.4 mi · 8 min · North Pan Am Expressway
-
18
Continue on Purple Heart Trail
11.9 mi · 13 min · Purple Heart Trail
-
19
Continue on Interstate Highway 35
1.9 mi · 2 min · Interstate Highway 35
-
20
Continue on Purple Heart Trail
46.7 mi · 51 min · Purple Heart Trail
-
21
Take the exit slight right toward 6th - 12th Streets
665 ft · 24 sec
-
22
Turn left onto East 6th Street
2863 ft · 1 min · East 6th Street
-
23
Turn left onto Congress Avenue
109 m · 18 sec · Congress Avenue
-
24
Turn left onto East 5th Street
8 m · 1 sec · East 5th Street
-
25
Arrive at your destination
0 m · 1 sec · East 5th Street
Car Route Details
A richer read on the saved driving route between San Carlos and Austin.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
I 69C North
Merge slight left
71.5 mi · 01h 16m
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.
Showers And Thunderstorms Likely leaving San Carlos and Mostly Cloudy near Austin.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from San Carlos to Austin?
The road trip is about 323 miles (519.8 km) and usually takes 04h 54m 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?
Three Rivers is a useful midpoint, sitting about 152.9 miles from San Carlos and 170.1 miles from Austin.
How much longer is the road route than the straight-line distance?
The direct path is about 275.1 miles (442.8 km), while the road route adds roughly 47.9 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 CST. If you want a more comfortable same-day return, try to leave by 7:10 AM CST.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $40.82 one way or $81.65 round trip. Estimated CO2 is about 101.3 kg one way.
What should you check before leaving?
Before you leave, expect Showers And Thunderstorms Likely around San Carlos and Mostly Cloudy near Austin.
Stop Ideas Near Three Rivers
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 Three Rivers.
San Antonio Station
Flight Path Map
This map shows the direct air route between San Carlos and Austin. Straight-line distance: 275.13 mi (442.78 km).
#1 San Carlos
San Carlos is a place in Texas, United States.
| Population | 0 |
| Coordinates | 26.2956300, -98.0719500 |
| Altitude | 23 |
| Country | United States |
#2 Austin
The eleventh most populous city in the United States and the center of the Austin metropolitan area.
| Population | 995,484 |
| Coordinates | 30.2671500, -97.7430600 |
| Altitude | 149 |
| Country | United States |
End: East 5th Street (-97.743073, 30.267115)
Estimated Travel Time
Distance: 520 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 10h 45m |
| 40 mph (64.37 km/h) | 08h 04m |
| 50 mph (80.47 km/h) | 06h 27m |
| 60 mph (96.56 km/h) | 05h 22m |
| 70 mph (112.65 km/h) | 04h 36m |
| 80 mph (129 km/h) | 04h 01m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.58 | $40.82 | $81.65 |
| Mid-grade | $4.09 | $46.67 | $93.34 |
| Premium | $4.47 | $50.98 | $101.96 |
| Diesel | $5.68 | $64.77 | $129.55 |
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 · Nov 06, 2026