If you are planning a trip from Lakeway to San Antonio, expect a straightforward journey covering 92.5 miles. You should budget approximately 1 hour and 47 minutes of drive time, making this a very manageable excursion that fits easily into a single day. Since both cities are located within the Great Plains region of Texas, the transition between them is seamless and familiar. You can anticipate a fuel cost of around $14 for the trip, which is quite economical for a door-to-door drive. Because the duration is under two hours, there is no need to split this into an overnight stay, allowing you the flexibility to complete the trip at your own pace.
Trip Pace
Same-day drive is realistic
A same-day return is realistic if you keep stops short.
Midpoint
45.1 miles from Lakeway, TX
A natural place for your longest stop of the day
, about 1h 1m into the drive
.
Main Roads
Road
Distance
Duration
Purple Heart Trail
38 mi
40m
North Pan Am Expressway
17 mi
20m
North FM 1626
8.8 mi
11m
West Highway 71
5.9 mi
8m
45 Southwest Toll Road
3.4 mi
3m
Ranch Road 620 South
2.9 mi
4m
West Slaughter Lane
2.3 mi
4m
Lohmans Crossing Road
1.9 mi
4m
Longest stretch:
Purple Heart Trail
— 38 mi, about 40m
Turn-by-Turn Driving Directions
Step-by-step road directions between Lakeway, TX and San Antonio, TX.
1
Start on this road
112 ft·13 sec·this road
2
Turn left onto Lohmans Crossing Road
1.9 mi·4 min·Lohmans Crossing Road
3
Turn right onto RM 620
2.9 mi·4 min·Ranch Road 620 South
Use the straight / left / right lanes.
4
Turn left onto TX 71
5.9 mi·8 min·West Highway 71
Use the left lane.
5
Continue on State Highway 71 West
1.1 mi·1 min·State Highway 71 West
6
Turn slight right
274 ft·10 sec
7
Merge onto West US Highway 290 Frontage Road
0.9 mi·1 min·West US Highway 290 Frontage Road
8
Turn left onto RM 1826
0.9 mi·1 min·Ranch Road 1826
9
Turn left onto West Slaughter Lane
2.3 mi·4 min·West Slaughter Lane
Use the left lane.
10
Take the ramp
0.3 mi·37 sec
Toward Loop 1 SouthUse the straight / slight right lanes.
11
Merge onto Loop 1
1.9 mi·2 min·South Mopac Expressway
12
Keep slight left at fork
0.3 mi·31 sec
Toward 45 Toll EastUse the slight left / slight right lanes.
13
Merge onto 45 Toll
3.4 mi·3 min·45 Southwest Toll Road
Toward TX 45 TollUse the straight / slight right lanes.
14
Keep slight right at fork
293 ft·7 sec
Toward FM 1626 SouthUse the right lane.
15
Turn straight onto FM 1626
8.8 mi·11 min·North FM 1626
16
Turn slight right
172 ft·6 sec
Toward I 35 South: San MarcosUse the right lane.
17
Turn straight onto South Interstate 35
1.0 mi·1 min·South Interstate 35
18
Continue on I 35 Business
0.4 mi·41 sec·North Old Highway 81
19
Take the ramp
0.2 mi·27 sec
Toward I 35 South
20
Merge onto I 35
26 mi·27 min·Purple Heart Trail
Use the straight / slight right lanes.
21
Continue on I 35
1.7 mi·1 min·Interstate Highway 35
Use the straight / slight right lanes.
22
Continue on I 35
12 mi·12 min·Purple Heart Trail
Use the straight / slight right lanes.
23
Continue on I 35
10.0 mi·11 min·North Pan Am Expressway
Use the straight / slight right lanes.
24
Keep slight left at fork onto I 35
6.4 mi·8 min·North Pan Am Expressway
Toward I 35 SouthUse the straight / slight right lanes.
25
Keep slight left at fork onto I 35
0.6 mi·41 sec·North Pan Am Expressway
Toward I 35 South: Lower Level, LaredoUse the slight left lane.
26
Take the exit
0.1 mi·16 sec
Exit 157AToward Lexington Avenue, Main Avenue, San Pedro AvenueUse the slight right lane.
27
Turn straight onto East Elmira Street
526 ft·17 sec·East Elmira Street
Use the left / straight lanes.
28
Turn left onto North Main Avenue
0.2 mi·18 sec·North Main Avenue
Use the left / straight lanes.
29
Enter roundabout onto Navarro Street
159 ft·3 sec·Navarro Street
30
Continue on Navarro Street
111 ft·2 sec·Navarro Street
31
Keep slight right at fork onto North Main Avenue
0.4 mi·51 sec·North Main Avenue
Use the slight left / slight right lanes.
32
Turn right onto West Travis Street
222 ft·10 sec·West Travis Street
33
Turn left onto North Flores Street
0.2 mi·20 sec·North Flores Street
34
Continue on Military Plaza
392 ft·15 sec·Military Plaza
35
Turn left onto Dolorosa Street
327 ft·8 sec·Dolorosa Street
36
Arrive at destination
Dolorosa Street
Trip Plan
Since this is a relatively short trip, you have the advantage of total flexibility in your departure time. However, because the route relies on local roads rather than high-speed highways, traffic patterns on these specific paths can fluctuate, so checking your GPS before you head out is a smart move. You won't need to plan for any formal stops given the 1 hour and 47 minute duration, but keeping an eye on your fuel gauge is wise despite the modest $14 cost. My biggest tip for this specific drive is to stay alert for the frequent turns along Ranch Road 620 South and Highway 71, as the lack of highway miles means you will be navigating intersections more often than on a typical interstate route.
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 45.1 miles from Lakeway, TX, or about 1h 1m into the drive.
The longest continuous stretch on this route runs about 38 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 20 miles or 30m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 45.1 miles or 1h 1m 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 32m
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 Lakeway, TX so your first major turns are already loaded.
Day 1
Settle into the route from Lakeway, TX
This is one driving day of about 90.1 miles and 1h 53m.
Your first comfortable stop window is around 20 miles from Lakeway, 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 38 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 24
5 decision points cluster between mile 18 and 88.9 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
7
18 mi into trip|~28m in
Keep slight left at fork toward 45 Toll East
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight left / slight right lanes.
Toward 45 Toll East
7
21.7 mi into trip|~32m in
Keep slight right at fork toward FM 1626 South
Highway fork - watch signs carefully. Lane positioning matters here
Use the right lane.
Toward FM 1626 South
7
82 mi into trip|~1h 42m 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
88.4 mi into trip|~1h 50m 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
88.9 mi into trip|~1h 50m 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...
Fuel & Cost
Regular Gas
$13.61 one way
$27.23 round trip
$3.84/gal25.4 MPG avg32 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.20
$14.90
$29.80
premium
$4.54
$16.09
$32.17
diesel
$5.61
$19.89
$39.79
Estimated Tolls: $0.24
45 Southwest Toll Road
(3.4 mi)$0.24
Toll estimates based on average 2024-2025 rates. EZ-Pass/SunPass discounts may lower the actual cost.
Estimated Trip Cost (one way, 1 person)
Fuel
$14
Tolls
$0
Meals
$25–$50
Total
$39–$64
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 31.5 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $9 in charging
· 0 stops
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
27
0
$9.46
$4.32
Efficient EV
22.5
0
$7.88
$3.60
EV Truck/SUV
36
0
$12.61
$5.77
Gas CO2
32 kg
EV CO2
11 kg (66% 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.
Forecast as of Apr 20, 2026
Origin
Lakeway, TX
Morning
in Lakeway on Tuesday
Local time
6:03 AM
CDT
Current temp
87°F
Unavailable
Live forecast
Destination
San Antonio, TX
Morning
in San Antonio on Tuesday
Local time
6:03 AM
CDT
Current temp
70°F
Unavailable
Live forecast
88°F
San Marcos, TX
45 mi in
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
17 degrees cooler at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
1h 53m on the road
Use the two city cards together: check the sky where you start, then compare it with the local time and temperature at arrival.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
More Details
What kind of drive is this?
Forget the monotony of long-haul interstates; this route is a turn-heavy local drive that demands your full attention. You will navigate a series of local roads, starting with Lohmans Crossing Road and Ranch Road 620 South before transitioning onto Highway 71. With a highway share of 0%, you won't be cruising on high-speed freeways, so prepare for a slower, more deliberate pace behind the wheel. The absence of long, uninterrupted stretches means the road keeps you engaged with constant changes in direction. It is a practical drive that favors local connectivity over the efficiency of major thoroughfares.
43% highway, the rest on surface roads — varied driving throughout.
36 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 38 mi on Purple Heart Trail.
How Hard Is This Drive?
10/10
This route mixes highway mileage with some local-road sections near the start or finish. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 18 miles in.
Driving Effort10/10
Demanding - stay alert through the decision-heavy sections
Balances navigation complexity with total wheel time.
This drive requires moderate attention. Across 90.1 miles you will encounter 24 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 18 miles: Highway fork - watch signs carefully. Lane positioning matters here; at 21.7 miles: Highway fork - watch signs carefully. Lane positioning matters here; at 82 miles (I 35 / North Pan Am Expressway): Highway fork - watch signs carefully. Lane positioning matters here.
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between Lakeway, TX and San Antonio, TX, road signs point toward Loop 1 South, 45 Toll East and Fm 1626 South.
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 1h 53m. Total distance: 90.1 miles.
Family Friendly
Moderate complexity with 0 natural rest stops along the way.
Solo Traveler
1h 53m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (43%). Some complex stretches to watch for.
Frequently Asked Questions
The longest stretch is about 38 miles on Purple Heart Trail. The full list of main roads is in the Roads section above.
Expect about $0.24 in tolls one way, starting with 45 Southwest Toll Road. Most Northeast and Midwest toll agencies accept E-ZPass; in the West and Texas, transponders like TxTag or FasTrak apply. If you do not have a transponder, cashless tolling plates will mail a bill to the vehicle's registered address — usually with a surcharge, so a rental-car toll pass is often cheaper than paying by mail.
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 18 miles: Highway fork - watch signs carefully. Lane positioning matters here; at 21.7 miles: Highway fork - watch signs carefully. Lane positioning matters here; at 82 miles (I 35 / North Pan Am Expressway): Highway fork - watch signs carefully. Lane positioning matters here.
Yes. A round trip is manageable in a single day if you plan a break at San Antonio, TX before heading back.
