Service Plaza
0.1 mi from route
Trip from Austin, TX to San Antonio, TX
Pin this tripCompiled and reviewed by the US Trip Planner planning team at COD Solutions Oy · Last reviewed Apr 21, 2026 · Editorial standards
Drive Time
1h 30m
Distance
79.2 mi
127 km
Drive Score
8/10
Great drive
Same Day?
Yes, doable
Fuel Cost
$12
one way
EV Charging
Unknown
Best Time to Leave
4 AM
1h 23m
★
6 AM
1h 30m
8 AM
1h 44m
10 AM
1h 35m
12 PM
1h 34m
3 PM
1h 36m
5 PM
1h 43m
8 PM
1h 26m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Austin, TX
Wikimedia Commons
San Antonio, TX
Wikimedia Commons
Trip Overview
Connecting Austin and San Antonio, this 79.9-mile journey is a quick, straightforward trip across the Texas Great Plains. You can expect to spend about 1 hour and 20 minutes behind the wheel, making this an ideal day trip that requires no overnight stops. Budgeting approximately $12 for fuel will cover your transit via Interstate 35, I-35 South, and the Purple Heart Trail. Because the transit time is so brief, you have plenty of flexibility to plan your departure around your own schedule. Whether you are heading south for business or a change of scenery, this route is one of the most efficient ways to travel between these two major hubs.
Trip Pace
Same-day drive is realistic
A same-day return is realistic if you keep stops short.
Midpoint
39.6 miles from Austin, TX
A natural place for your longest stop of the day , about 44m into the drive .
Main Roads
| Road | Distance | Duration |
|---|---|---|
| Purple Heart Trail | 58.3 mi | 1h 3m |
| North Pan Am Expressway | 17 mi | 20m |
| Interstate Highway 35 | 1.7 mi | 1m |
| North Main Avenue | 0.6 mi | 1m |
| East 5th Street | 0.5 mi | 1m |
| North Interstate 35 | 0.4 mi | <1m |
| North Flores Street | 0.2 mi | <1m |
| East Elmira Street | <0.1 mi | <1m |
Longest stretch:
Purple Heart Trail
— 58.3 mi, about 1h 3m
Turn-by-Turn Driving Directions
Step-by-step road directions between Austin, TX and San Antonio, TX.
1
Start on East 5th Street
0.5 mi
·
1 min
·
East 5th Street
Use the straight / right lanes.
2
At end of road, turn right onto North Interstate 35
0.4 mi
·
39 sec
·
North Interstate 35
Use the straight / slight left lanes.
3
Take the ramp
0.2 mi
·
21 sec
Toward I 35 South
4
Merge onto I 35; US 290
46 mi
·
50 min
·
Purple Heart Trail
Use the straight / slight right lanes.
5
Continue on I 35
1.7 mi
·
1 min
·
Interstate Highway 35
Use the straight / slight right lanes.
6
Continue on I 35
12 mi
·
12 min
·
Purple Heart Trail
Use the straight / slight right lanes.
7
Continue on I 35
10.0 mi
·
11 min
·
North Pan Am Expressway
Use the straight / slight right lanes.
8
Keep slight left at fork onto I 35
6.4 mi
·
8 min
·
North Pan Am Expressway
Toward I 35 South
Use the straight / slight right lanes.
9
Keep slight left at fork onto I 35
0.6 mi
·
41 sec
·
North Pan Am Expressway
Toward I 35 South: Lower Level, Laredo
Use the slight left lane.
10
Take the exit
0.1 mi
·
16 sec
Exit 157A
Toward Lexington Avenue, Main Avenue, San Pedro Avenue
Use the slight right lane.
11
Turn straight onto East Elmira Street
526 ft
·
17 sec
·
East Elmira Street
Use the left / straight lanes.
12
Turn left onto North Main Avenue
0.2 mi
·
18 sec
·
North Main Avenue
Use the left / straight lanes.
13
Enter roundabout onto Navarro Street
159 ft
·
3 sec
·
Navarro Street
14
Continue on Navarro Street
111 ft
·
2 sec
·
Navarro Street
15
Keep slight right at fork onto North Main Avenue
0.4 mi
·
51 sec
·
North Main Avenue
Use the slight left / slight right lanes.
16
Turn right onto West Travis Street
222 ft
·
10 sec
·
West Travis Street
17
Turn left onto North Flores Street
0.2 mi
·
20 sec
·
North Flores Street
18
Continue on Military Plaza
392 ft
·
15 sec
·
Military Plaza
19
Turn left onto Dolorosa Street
327 ft
·
8 sec
·
Dolorosa Street
20
Arrive at destination
Dolorosa Street
Trip Plan
Since this is a short 1 hour and 20-minute drive, you do not need to worry about extensive rest stops or rigid pacing. I recommend checking real-time traffic reports for I-35 before you head out, as congestion can fluctuate significantly along this corridor. Because the total fuel cost is a modest $12, you can easily fill up at your origin or destination without needing to hunt for gas stations mid-trip. Use the flexibility of this short travel time to your advantage by avoiding peak rush hours in either city. Staying alert for changing traffic patterns on the Purple Heart Trail will make your transit much smoother.
Morning Departure
Leave by 9 AM and you'll arrive before lunch.
Evening Departure
Even a 4 PM departure gets you there before dark in summer.
You can normally do this drive in one day.
You may only need one short stretch break if traffic stays light.
The halfway point lands around 39.6 miles from Austin, TX, or about 44m into the drive.
The longest continuous stretch on this route runs about 58.3 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 17 miles or 19m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 39.6 miles or 44m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 1h 14m
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 Austin, TX so your first major turns are already loaded.
Day 1
Settle into the route from Austin, TX
This is one driving day of about 79.2 miles and 1h 30m.
Your first comfortable stop window is around 17 miles from Austin, TX.
This route can stay practical as a one-day drive if traffic stays reasonable.
The longest stretch is on Purple Heart Trail for about 58.3 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Mid-route town
Meal stop
40 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.
Pacing Suggestions
Fuel and coffee
A short stop after about 17 miles helps settle the day before fatigue starts building.
Meal break
The midpoint is around 39.6 miles from Austin, TX, which is a good place for a longer meal and fuel stop.
These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.
Stops Along Your Drive
Picked by where they fit in your drive — first break, midpoint reset, final stretch.
Buc-ee's
0.1 mi from route
TA
0.2 mi from route
Marlstone Retail Center
0.2 mi from route
Pilot Travel Center
0.3 mi from route
QuikTrip
0.4 mi from route
Pilot Travel Center
2.3 mi from route
Petro Stopping Centers
2.4 mi from route
Spanish Governor's Palace
4.5
★ ★ ★ ★ ★
Near the end, right off the route
Home stretch
0.1 mi from route
San Antonio, Texas
Hours: 9 am–5 pm
+12102077527
Visit websiteGO RIO San Antonio River Cruises
4.6
★ ★ ★ ★ ★
Near the end, right off the route
Home stretch
0.4 mi from route
~1 min detour
San Antonio, Texas
Hours: 10 am–10 pm
+12102274746
Visit websiteAustin Bat Tours
4.4
★ ★ ★ ★ ☆
Near the start, right off the route
0.2 mi from route
~1 min detour
Austin, Texas
Hours: 9 am–10 pm
Visit websiteSan Antonio | The Saga
4.5
★ ★ ★ ★ ★
Near the end, right off the route
Home stretch
0 mi from route
San Antonio, Texas
Hours: 9–9:30 pm
+12102259800
Visit websiteHemisfair
4.7
★ ★ ★ ★ ★
Near the end, right off the route
Home stretch
0.5 mi from route
~1 min detour
San Antonio, Texas
Hours: 5 am–12 pm
+12107094750
Visit websiteSan Antonio Fire Museum
4.9
★ ★ ★ ★ ★
Near the end, right off the route
Home stretch
0.6 mi from route
~1 min detour
San Antonio, Texas
Hours: 10 am–3:30 pm
+12103907236
Visit websiteThe Amazing Mirror Maze
4.4
★ ★ ★ ★ ☆
Near the end, right off the route
Home stretch
0.4 mi from route
~1 min detour
San Antonio, Texas
Hours: 10:30 am–8 pm
+12102242288
Visit websiteMorgan's Wonderland
4.8
★ ★ ★ ★ ★
Near the end, right off the route
Home stretch
0.9 mi from route
~2 min detour
San Antonio, Texas
Hours: 10 am–3 pm
+12104955888
Visit websitePlace data sourced from public business listings. Hours and availability may vary.
Heads-up: tricky spots
5 of 145 decision points cluster between mile 0.5 and 78.2 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
7
0.5 mi into trip
|
~1m in
|
North Interstate 35
At end of road, turn right onto North Interstate 35
Lane positioning matters here
Use the straight / slight left lanes.
7
71.1 mi into trip
|
~1h 18m in
|
I 35 / North Pan Am Expressway
Keep slight left at fork onto I 35 / North Pan Am Expressway toward I 35 South
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight right lanes.
Toward I 35 South
8
77.5 mi into trip
|
~1h 26m in
|
I 35 / North Pan Am Expressway
Keep slight left at fork onto I 35 / North Pan Am Expressway toward I 35 South: Lower Level, Laredo
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight left lane.
Toward I 35 South: Lower Level, Laredo
8
78 mi into trip
|
~1h 27m in
Take the exit toward Lexington Avenue, Main Avenue, San Pedro Avenue
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight right lane.
Exit 157A
Toward Lexington Avenue, Main Avenue, San Pedro...
6
78.2 mi into trip
|
~1h 28m in
|
North Main Avenue
Turn left onto North Main Avenue
Lane positioning matters here
Use the left / straight lanes.
Fuel & Cost
Regular Gas
$11.97 one way
$23.93 round trip
$3.84/gal
25.4 MPG avg
28 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.20 | $13.10 | $26.20 |
| premium | $4.54 | $14.14 | $28.28 |
| diesel | $5.61 | $17.49 | $34.97 |
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$12
Meals
$25–$50
Total
$37–$62
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 27.7 kg one way. Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $8 in charging · 0 stops · 68% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 23.8 | 0 | $8.32 | $3.80 |
| Efficient EV | 19.8 | 0 | $6.93 | $3.17 |
| EV Truck/SUV | 31.7 | 0 | $11.09 | $5.07 |
Gas CO2
28 kg
EV CO2
9 kg (68% less)
This trip is well within single-charge range for most EVs. No charging stops needed if you start fully charged.
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.
Origin
Austin, TX
Late night in Austin on Tuesday
Local time
5:58 AM
CDT
Current temp
63°F
Showers And Thunderstorms
ENE 5 mph
77% chance
Live forecast
Destination
San Antonio, TX
Late night in San Antonio on Tuesday
Local time
5:58 AM
CDT
Current temp
70°F
Unavailable
Live forecast
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
7 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
1h 30m on the road
The weather snapshot is not static. If you are leaving later, give both cities one more quick forecast check before departure.
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 79.2
View on nps.gov
Park data from the National Park Service API. Alerts update every 2 hours.
What kind of drive is this?
Expect a turn-heavy local drive rather than a monotonous, high-speed cruise. While you will be utilizing major arteries like I-35, the nature of the route requires your full attention due to the frequent turns and local traffic patterns. There is no significant highway-only stretch to zone out on, so you should prepare for an active driving experience. As you navigate from Austin toward San Antonio, the road demands consistent engagement. It is a practical, functional transit that moves you efficiently through the region without long, uninterrupted stretches of open road.
Only 24% highway — the rest is turn-by-turn surface driving.
20 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 58.3 mi on Purple Heart Trail.
How Hard Is This Drive?
8/10
Expect a hands-on drive with frequent turns and local roads rather than long highway stretches. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 0.5 miles in near North Interstate 35.
Driving Effort
8/10
Demanding - plan breaks and stay ahead of the key maneuvers
Balances navigation complexity with total wheel time.
This drive requires moderate attention. Across 79.2 miles you will encounter 14 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 0.5 miles (North Interstate 35): Lane positioning matters here; at 71.1 miles (I 35 / North Pan Am Expressway): Highway fork - watch signs carefully. Lane positioning matters here; at 77.5 miles (I 35 / North Pan Am Expressway): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one.
About the Cities
Starting in Austin, TX
Full guide →“City of the Violet Crown” · Founded 1835
Austin is a city of about 1,054,000 (2026) surpassing Fort Worth to become the 4th most populous city in Texas. It is on the southeast edge of the Hill Country region of Texas, making it the fourth-largest city in the state and the 11th-largest in the country. It is the capital of Texas and a college town, and also a center of an alternative culture away from the major cities on the US coasts, though the city is rapidly gentrifying with its rising popularity. Austin's attitude is commonly emblazoned about town on T-shirts and bumper stickers that read: "Keep Austin Weird." Austin is also marketed as the Live Music Capital of the World due to the large number of venues.
Top landmarks
- • Texas State Capitol — capitol and seat of government of the U.S. state of Texas
- • Lyndon Baines Johnson Library and Museum — presidential library and museum for U.S. President Lyndon B. Johnson in Austin,...
- • Texas State Cemetery — historic cemetery in Austin, Texas, USA
Arriving in San Antonio, TX
Full guide →Founded 1718
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
City content from Wikivoyage (CC BY-SA 4.0) and Wikidata (CC0).
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 1h 30m. Total distance: 79.2 miles.
Family Friendly
Moderate complexity with 0 natural rest stops along the way.
Solo Traveler
1h 30m drive, comfortable solo distance.
Scenic Drive
Mostly surface roads route profile with national parks nearby.
Frequently Asked Questions
The longest stretch is about 58.3 miles on Purple Heart Trail. The full list of main roads is in the Roads section above.
Yes — we found about 8 rest areas or service plazas within a short detour of the route (from OpenStreetMap). See the Rest Stops tab under Nearby Places for locations and mile markers. Plan to stretch, use the bathroom, and top off fluids every 2–3 hours on longer drives.
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.
Yes. At under 2 hours behind the wheel, this works well for families — plan one quick stop if you have younger kids.
The main spots that need attention: at 0.5 miles (North Interstate 35): Lane positioning matters here; at 71.1 miles (I 35 / North Pan Am Expressway): Highway fork - watch signs carefully. Lane positioning matters here; at 77.5 miles (I 35 / North Pan Am Expressway): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one.
Yes — San Antonio Missions National Historical Park. See the National Parks section for detour distances and tips on detours.
Yes. A round trip is manageable in a single day if you plan a break at San Antonio, TX before heading back.
How this page is built
Compiled by the US Trip Planner planning team at COD Solutions Oy from open government datasets — OSRM over OpenStreetMap for geometry, EIA for fuel prices, and NPS for national parks. See our methodology for refresh cadence and limitations.
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