This 99.6-mile drive from Cedar Park, TX to San Antonio, TX is easily manageable as a single-day trip, taking approximately 1 hour and 55 minutes. You'll primarily navigate along the Purple Heart Trail, North Pan Am Expressway, and US 183. With an estimated fuel cost of $15, this route offers a straightforward journey through the Great Plains region of Texas. It’s a practical choice for a quick transition between two points without requiring an overnight stay, allowing for flexibility in your schedule.
Trip Pace
Same-day drive is realistic
A same-day return is realistic if you keep stops short.
Midpoint
49.8 miles from Cedar Park, TX
A natural place for your longest stop of the day
, about 58m into the drive
.
Step-by-step road directions between Cedar Park, TX and San Antonio, TX.
1
Start on US 183
0.4 mi·42 sec·North Bell Boulevard
2
Turn left onto Park Street
274 ft·13 sec·Park Street
Use the left lane.
3
Turn left
213 ft·12 sec
4
Turn left
273 ft·20 sec
5
At end of road, turn right onto US 183
1.9 mi·2 min·South Bell Boulevard
Use the left lane.
6
Turn left onto Avery Ranch Boulevard
414 ft·15 sec·Avery Ranch Boulevard
Use the left lane.
7
Turn right onto 183A Frontage Road
401 ft·11 sec·183A Frontage Road
8
Keep slight left at fork
0.2 mi·32 sec
Toward 183A Toll SouthUse the slight left / slight right lanes.
9
Merge onto 183A Toll
0.7 mi·42 sec·183A Toll Road
10
Continue on US 183
12 mi·13 min·US 183
11
Take the exit
0.4 mi·54 sec
Toward I 35 South: San AntonioUse the straight / slight right lanes.
12
Merge onto I 35
2.5 mi·3 min·Purple Heart Trail
13
Keep slight left at fork onto I 35; US 290
50 mi·54 min·Purple Heart Trail
Toward 32nd Street, Dean Keeton StreetUse the slight left lane.
14
Continue on I 35
1.7 mi·1 min·Interstate Highway 35
Use the straight / slight right lanes.
15
Continue on I 35
12 mi·12 min·Purple Heart Trail
Use the straight / slight right lanes.
16
Continue on I 35
10.0 mi·11 min·North Pan Am Expressway
Use the straight / slight right lanes.
17
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.
18
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.
19
Take the exit
0.1 mi·16 sec
Exit 157AToward Lexington Avenue, Main Avenue, San Pedro AvenueUse the slight right lane.
20
Turn straight onto East Elmira Street
526 ft·17 sec·East Elmira Street
Use the left / straight lanes.
21
Turn left onto North Main Avenue
0.2 mi·18 sec·North Main Avenue
Use the left / straight lanes.
22
Enter roundabout onto Navarro Street
159 ft·3 sec·Navarro Street
23
Continue on Navarro Street
111 ft·2 sec·Navarro Street
24
Keep slight right at fork onto North Main Avenue
0.4 mi·51 sec·North Main Avenue
Use the slight left / slight right lanes.
25
Turn right onto West Travis Street
222 ft·10 sec·West Travis Street
26
Turn left onto North Flores Street
0.2 mi·20 sec·North Flores Street
27
Continue on Military Plaza
392 ft·15 sec·Military Plaza
28
Turn left onto Dolorosa Street
327 ft·8 sec·Dolorosa Street
29
Arrive at destination
Dolorosa Street
Trip Plan
Given the relatively short duration of under two hours, you have the flexibility to depart Cedar Park at your convenience. Plan for minimal stops, as the drive is not excessively long. Keep an eye on your fuel levels, especially during the 64.2-mile stretch on the Purple Heart Trail, to ensure a smooth arrival in San Antonio. The estimated fuel cost of $15 makes it an economical choice for a day trip.
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 49.8 miles from Cedar Park, TX, or about 58m into the drive.
The longest continuous stretch on this route runs about 64.2 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 22 miles or 27m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 49.8 miles or 58m 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 33m
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 Cedar Park, TX so your first major turns are already loaded.
Day 1
Settle into the route from Cedar Park, TX
This is one driving day of about 99.6 miles and 1h 55m.
Your first comfortable stop window is around 22 miles from Cedar Park, 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 64.2 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 21
5 decision points cluster between mile 2.5 and 98.4 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
8
2.5 mi into trip|~4m in
Keep slight left at fork toward 183A Toll South
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight left / slight right lanes.
Toward 183A Toll South
8
18 mi into trip|~23m in|I 35; US 290 / Purple Heart Trail
Keep slight left at fork onto I 35; US 290 / Purple Heart Trail toward 32nd Street, Dean Keeton Street
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight left lane.
Toward 32nd Street, Dean Keeton Street
7
91.5 mi into trip|~1h 44m 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
97.9 mi into trip|~1h 52m 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
98.4 mi into trip|~1h 53m 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
$15.05 one way
$30.10 round trip
$3.84/gal25.4 MPG avg35 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.20
$16.47
$32.95
premium
$4.54
$17.78
$35.57
diesel
$5.61
$21.99
$43.98
Estimated Tolls: $0.05
183A Toll Road
(0.7 mi)$0.05
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
$15
Tolls
$0
Meals
$25–$50
Total
$40–$65
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 34.8 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $10 in charging
· 0 stops
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
29.9
0
$10.46
$4.78
Efficient EV
24.9
0
$8.71
$3.98
EV Truck/SUV
39.8
0
$13.94
$6.37
Gas CO2
35 kg
EV CO2
12 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 18, 2026
Origin
Cedar Park, TX
Late night
in Cedar Park on Tuesday
Local time
4:25 AM
CDT
Current temp
81°F
Unavailable
Live forecast
Destination
San Antonio, TX
Late night
in San Antonio on Tuesday
Local time
4:25 AM
CDT
Current temp
67°F
Mostly Cloudy
SSE 5 to 10 mph1% chanceLive forecast
88°F
San Marcos, TX
50 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
14 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 55m 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 99.6
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
The drive presents a mixed profile, with about 30% of the journey on highways. You'll encounter a longest uninterrupted stretch of 64.2 miles on the Purple Heart Trail, offering a consistent pace. Expect a blend of faster highway sections and potentially more local road segments as you progress toward San Antonio. This varied character means you won't be stuck in a monotonous interstate grind for the entire trip.
30% highway, the rest on surface roads — varied driving throughout.
29 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 64.2 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 2.5 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 99.6 miles you will encounter 21 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 2.5 miles: Highway fork - watch signs carefully. Lane positioning matters here; at 18 miles (I 35; US 290 / Purple Heart Trail): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 91.5 miles (I 35 / North Pan Am Expressway): Highway fork - watch signs carefully. Lane positioning matters here.
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 55m. Total distance: 99.6 miles.
Family Friendly
Moderate complexity with 0 natural rest stops along the way.
Solo Traveler
1h 55m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (30%). Some complex stretches to watch for.
Scenic Drive
Mixed highway & surface route profile with national parks nearby.
Frequently Asked Questions
The longest stretch is about 64.2 miles on Purple Heart Trail. The full list of main roads is in the Roads section above.
Expect about $0.05 in tolls one way, starting with 183A 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 2.5 miles: Highway fork - watch signs carefully. Lane positioning matters here; at 18 miles (I 35; US 290 / Purple Heart Trail): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 91.5 miles (I 35 / North Pan Am Expressway): Highway fork - watch signs carefully. Lane positioning matters here.
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.
