Service Plaza
0.1 mi from route
Trip from Austin, TX to South Padre Island, TX
Pin this tripCompiled and reviewed by the US Trip Planner planning team at COD Solutions Oy · Last reviewed Jul 19, 2026 · Editorial standards
Drive Time
6h 44m
Distance
370 mi
595 km
Drive Score
9/10
Great drive
Same Day?
Yes, doable
Fuel Cost
$51
one way
EV Charging
Unknown
Best Time to Leave
4 AM
6h 32m
★
6 AM
6h 44m
8 AM
7h 8m
10 AM
6h 53m
12 PM
6h 50m
3 PM
6h 54m
5 PM
7h 7m
8 PM
6h 37m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Austin, TX
Wikimedia Commons
South Padre Island, TX
Wikimedia Commons
Trip Overview
Austin, TX to South Padre Island, TX is 370 miles and takes about 6h 44m via I 37 and U.S. Highway 77, with a fuel budget near $54 and enough daylight to finish in a day. This trip stays within Texas, beginning in the Great Plains region and ending in the same region. The majority of this route is on highways, making for a straightforward drive. It's a solid option if you're looking for a direct path to the coast without too many detours.
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
185 miles from Austin, TX
A natural place for your longest stop of the day , about 3h 15m into the drive .
Main Roads
| Road | Distance | Duration |
|---|---|---|
| I 37 | 118.7 mi | 1h 59m |
| U.S. Highway 77 | 105 mi | 1h 56m |
| Purple Heart Trail | 58.3 mi | 1h 3m |
| I 69E | 31.3 mi | 33m |
| Brownsville-Port Isabel Highway | 14.1 mi | 15m |
| Connally Loop | 11 mi | 12m |
| North Pan Am Expressway | 10 mi | 11m |
| Interstate 169 | 3.7 mi | 3m |
Longest stretch:
I 37
— 118.7 mi, about 1h 59m
Traffic on I-37
Hour-of-day weekday pattern from 14 FHWA count stations on your route.
Peak
3 PM
~1,146 veh/hr typical · worst 1,732
Quietest
2 AM
~151 veh/hr
Peak-to-quiet ratio
7.6×
busier at peak than in the quiet hours
12a
6a
noon
6p
11p
Averaged across 51 weeks of 2023 FHWA Travel Monitoring Analysis System data. Weekday hours only (Mon–Fri).
Turn-by-Turn Driving Directions
Step-by-step road directions between Austin, TX and South Padre Island, 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 right at fork onto I 410
11 mi
·
12 min
·
Connally Loop
Toward I 410 South
Use the straight / slight right lanes.
9
Take the exit
0.2 mi
·
28 sec
Exit 41
Toward I 37, US 281 North: San Antonio, Corpus Christi
Use the straight / slight right lanes.
10
Keep slight left at fork
0.5 mi
·
1 min
Toward I 37 South: Corpus Christi
Use the slight left / slight right lanes.
11
Merge onto I 37
119 mi
·
1 hr 59 min
·
I 37
Use the straight / slight right lanes.
12
Take the exit onto I 69E; US 77
31 mi
·
33 min
·
I 69E; US 77
Toward I 69E, US 77: Kingsville, Brownsville
Use the straight / slight right lanes.
13
Keep slight left at fork onto US 77
61 mi
·
1 hr 9 min
·
U.S. Highway 77
14
Keep slight left at fork onto I 69E; US 77
44 mi
·
46 min
·
U.S. Highway 77
Use the straight / slight right lanes.
15
Continue on I 69E; US 77; US 83
2.1 mi
·
2 min
·
North Expressway
16
Keep slight right at fork onto I 169; TX 550 Toll
3.7 mi
·
3 min
·
Interstate 169
Exit 10B
Toward TX 550 Toll: Port of Brownsville
Use the straight / slight right lanes.
17
Continue on I 169; TX 550 Toll
0.8 mi
·
51 sec
·
I-169, TX 550 Toll
18
Continue on FM 511
2.0 mi
·
2 min
·
FM 511
19
Continue on TX 550 Toll
3.7 mi
·
4 min
·
State Highway 550
20
Turn left
0.2 mi
·
27 sec
Use the left lane.
21
Merge onto TX 48
14 mi
·
15 min
·
Brownsville-Port Isabel Highway
22
Turn right onto TX 100
1.0 mi
·
2 min
·
State Highway 100
23
Turn slight right onto TX 100
0.5 mi
·
1 min
·
West Queen Isabella Boulevard
24
Continue on TX 100
2.7 mi
·
4 min
·
Queen Isabella Causeway
25
Turn left onto PR 100
0.7 mi
·
1 min
·
Padre Boulevard
Use the left / straight lanes.
26
Turn right onto East Haas Street
509 ft
·
19 sec
·
East Haas Street
27
Turn left onto Gulf Boulevard
0.6 mi
·
1 min
·
Gulf Boulevard
28
Turn right
87 ft
·
11 sec
29
Turn left
77 ft
·
5 sec
30
Arrive at destination
Trip Plan
Given the 6h 44m estimated drive time, leaving Austin in the morning should allow you to reach South Padre Island with plenty of daylight remaining. You'll only have one recommended stop, so plan it strategically for fuel and a break. The fuel cost is estimated at $54, so ensure your tank is full before you depart. Keep an eye on your fuel gauge, especially during the longer stretches on I 37, as services can be more spread out in some areas.
Morning Departure
Start early — leave by 6-7 AM to arrive at a reasonable hour.
Evening Departure
This is a long drive — plan for a morning departure or consider splitting it into two days.
You can normally do this drive in one day.
Plan roughly 1 meaningful break for fuel, food, and rest.
The halfway point lands around 185 miles from Austin, TX, or about 3h 15m into the drive.
The longest continuous stretch on this route runs about 118.7 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 81 miles or 1h 30m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 185 miles or 3h 15m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 5h 32m
Traffic, exits, and arrival timing usually matter more near South Padre Island, 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.
+
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 Austin, TX
This is one driving day of about 370 miles and 6h 44m.
Your first comfortable stop window is around 81 miles from Austin, 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 37 for about 118.7 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Mid-route town
Meal stop
185 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 81 miles helps settle the day before fatigue starts building.
Meal break
The midpoint is around 185 miles from Austin, TX, which is a good place for a longer meal and fuel stop.
Before the longest stretch
Fuel checkTop up before I 37 if your tank is already low. That segment runs about 118.7 miles.
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.
Love's Travel Stop
0.1 mi from route
Picnic Area
0.1 mi from route
Buc-ee's
0.1 mi from route
Kenedy County Rest Area
0.1 mi from route
Flying J Travel Center
0.1 mi from route
Texas Travel Information Center at Harlingen
0.1 mi from route
San Patricio County Southbound Rest Area
0.1 mi from route
San Patricio County Northbound Rest Area
0.1 mi from route
Live Oak County Southbound Rest Area
0.1 mi from route
Live Oak County Northbound Rest Area
0.1 mi from route
Parking Area
0.1 mi from route
Picnic Area
0.1 mi from route
Picnic Area
0.1 mi from route
Love's Travel Stop
0.1 mi from route
Love's Travel Stop
0.1 mi from route
Road Ranger
0.1 mi from route
Service Plaza
0.1 mi from route
QuikTrip
0.1 mi from route
TA
0.2 mi from route
Pilot Travel Center
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
0.7 mi from route
Petro Stopping Centers
0.7 mi from route
Love's Travel Stop
0.9 mi from route
TA
1.7 mi from route
Flying J Travel Center
1.8 mi from route
QuikTrip
2 mi from route
Sandcastle Lessons - Andy Hancock
5.0
★ ★ ★ ★ ★
Near the end, right off the route
Home stretch
0.2 mi from route
~1 min detour
South Padre Island, Texas
Hours: 9 am–5 pm
+19564339948
Visit websiteSPI Excursions
4.8
★ ★ ★ ★ ★
Near the end, right off the route
Home stretch
0.5 mi from route
~1 min detour
South Padre Island, Texas
Hours: 8 am–6:30 pm
+18887098283
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 websiteGravity Park
4.4
★ ★ ★ ★ ☆
Near the end, right off the route
Home stretch
0.2 mi from route
~1 min detour
South Padre Island, Texas
Hours: 6–10:30 pm
+19567618588
Visit websiteAnimal World & Snake Farm Zoo
4.6
★ ★ ★ ★ ★
Near the start, right off the route
First break
0.5 mi from route
~1 min detour
New Braunfels, Texas
Hours: 10 am–6 pm
+18304024603
Visit websiteHoliday Sand Sculpture Village
4.8
★ ★ ★ ★ ★
Near the end, right off the route
Home stretch
0.3 mi from route
~1 min detour
South Padre Island, Texas
Hours: Open 24 hours
+19564592928
Visit websiteIsla Tours
4.7
★ ★ ★ ★ ★
Near the end, short detour
Home stretch
1.9 mi from route
~5 min detour
South Padre Island, Texas
Hours: 7 am–6 pm
+19567614752
Visit websiteThe Original Dolphin Watch
4.7
★ ★ ★ ★ ★
Near the end, short detour
Home stretch
1.9 mi from route
~5 min detour
South Padre Island, Texas
Hours: 10 am–8 pm
+19567614243
Visit websitePlace data sourced from public business listings. Hours and availability may vary.
Heads-up: tricky spots
5 of 205 decision points cluster between mile 0.5 and 339.9 — 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 410 / Connally Loop
Keep slight right at fork onto I 410 / Connally Loop toward I 410 South
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight right lanes.
Toward I 410 South
8
82 mi into trip
|
~1h 31m in
Take the exit toward I 37, US 281 North: San Antonio, Corpus Christi
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 41
Toward I 37, US 281 North: San Antonio, Corpus...
7
82.2 mi into trip
|
~1h 31m in
Keep slight left at fork toward I 37 South: Corpus Christi
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight left / slight right lanes.
Toward I 37 South: Corpus Christi
8
339.9 mi into trip
|
~6h 4m in
|
I 169; TX 550 Toll / Interstate 169
Keep slight right at fork onto I 169; TX 550 Toll / Interstate 169 toward TX 550 Toll: Port of Brownsville
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight right lanes.
Exit 10B
Toward TX 550 Toll: Port of Brownsville
Fuel & Cost
Regular Gas
$50.68 one way
$101.36 round trip
$3.48/gal
25.4 MPG avg
130 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $3.89 | $56.61 | $113.21 |
| premium | $4.23 | $61.55 | $123.09 |
| diesel | $4.80 | $69.86 | $139.73 |
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$51
Meals
$25–$50
Total
$76–$101
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 129.5 kg one way. Prices: EIA weekly data, 2026-07-13.
Driving Electric?
About $39 in charging · 1 stop · 67% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 111 | 1 | $38.85 | $17.76 |
| Efficient EV | 92.5 | 1 | $32.38 | $14.80 |
| EV Truck/SUV | 148 | 1 | $51.80 | $23.68 |
Gas CO2
129 kg
EV CO2
43 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.
Origin
Austin, TX
Late night in Austin on Sunday
Local time
2:00 AM
CDT
Current temp
75°F
Mostly Cloudy
SSE 5 mph
7% chance
Live forecast
Flash Flood Warning
Flash Flood Warning issued July 17 at 2:05AM CDT until July 17 at 5:00AM CDT by NWS San Angelo TX
Flood Warning
Flood Warning issued July 17 at 1:58AM CDT until July 19 at 10:00PM CDT by NWS Austin/San Antonio TX
Destination
South Padre Island, TX
Late night in South Padre Island on Sunday
Local time
2:00 AM
CDT
Current temp
82°F
Partly Cloudy
SSE 17 mph
0% chance
Live forecast
Flash Flood Warning
Flash Flood Warning issued July 17 at 2:05AM CDT until July 17 at 5:00AM CDT by NWS San Angelo TX
Flood Warning
Flood Warning issued July 17 at 1:58AM CDT until July 19 at 10:00PM CDT by NWS Austin/San Antonio 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
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
6h 44m on the road
Start early — leave by 6-7 AM to arrive at a reasonable hour.
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.
Palo Alto Battlefield National Historical Park
National Historical Park
On May 8, 1846, U.S. and Mexican troops clashed on the prairie of Palo Alto. The battle was the first in a two-year long war that changed the map of North America. Although the two countries have deve...
1 mi from route
~3 min detour
Free
near mile 344.5
View on nps.gov
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...
6 mi from route
~14 min detour
Free
near mile 89.3
View on nps.gov
Padre Island National Seashore
National Seashore
Protecting sixty-six miles of wild coastline along the Gulf of America, the narrow barrier island is home to one of the last intact coastal prairie habitats in the United States. Along the hypersaline...
27 mi from route
~68 min detour
$25
near mile 267.9
View on nps.gov
Park data from the National Park Service API. Alerts update every 2 hours.
What kind of drive is this?
This drive is primarily on highways, with 76% of the total distance covered by interstate or major roadways. You'll encounter a longest stretch of 118.7 miles on I 37 before transitioning to surface roads. Expect a more rural cruising feel as you get closer to your destination, with fewer exits compared to the interstate sections.
76% highway — fuel and pacing are the main things to plan.
30 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 118.7 mi on I 37.
How Hard Is This Drive?
8/10
This is a straightforward highway drive that stays mostly on I 37 and U.S. Highway 77. 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 is a demanding drive. With 20 significant decision points across 370 miles, you will need to stay alert - especially through interchange areas and urban stretches. Consider splitting it into segments if you are not comfortable with fast highway navigation.
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 410 / Connally Loop): Highway fork - watch signs carefully. Lane positioning matters here; at 82 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one.
Elevation Profile
Mostly flat terrain
726 ft
10 ft
Total Climb
252 ft
Total Descent
728 ft
Highest Point
726 ft
~52.9 mi in
Elevation Range
716 ft
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between Austin, TX and South Padre Island, TX, road signs point toward Corpus Christi and Brownsville.
Corpus Christi
82 mi in
|
~1h 31m
Brownsville
201.5 mi in
|
~3h 32m
|
via I 69E; US 77
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 South Padre Island, TX
Full guide →South Padre Island is a small resort town on the southern tip of Padre Island off the coast of Texas, close to the border with Mexico. It is a popular spring break destination for college students.
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 6h 44m. Total distance: 370 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
6h 44m drive, plan rest stops for pacing.
Frequently Asked Questions
The longest stretch is about 118.7 miles on I 37. The full list of main roads is in the Roads section above.
Yes — we found about 30 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 South Padre Island, 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. There are 30 rest areas along the route for bathroom stops.
The main spots that need attention: at 0.5 miles (North Interstate 35): Lane positioning matters here; at 71.1 miles (I 410 / Connally Loop): Highway fork - watch signs carefully. Lane positioning matters here; at 82 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one.
Yes — Palo Alto Battlefield National Historical Park, San Antonio Missions National Historical Park and Padre Island National Seashore. See the National Parks section for detour distances and tips on detours.
Not recommended in a single day. At 6.7 hours each way, a round trip means 13.5 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at South Padre Island, TX before the return drive.
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, USGS 3DEP for elevation, NPS for national parks, and FHWA TMAS for hourly traffic volumes. See our methodology for refresh cadence and limitations.
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