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Trip from San Antonio, TX to San Carlos, TX

Last recalculated Apr 17, 2026

Drive Time

4h 10m

Distance

231.6 mi

373 km

Drive Score

10/10

Great drive

Same Day?

Yes, doable

Fuel Cost

$35

one way

EV Charging

Unknown

Best Time to Leave

Save up to 40 min
4 AM
3h 57m ★
6 AM
4h 11m
8 AM
4h 37m
10 AM
4h 20m
12 PM
4h 17m
3 PM
4h 21m
5 PM
4h 36m
8 PM
4h 3m

Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.

Best Time Drive vs Fly
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Downtown San Antonio, TX, TX

San Antonio, TX

Wikimedia Commons

Downtown San Carlos, TX, TX

San Carlos, TX

Fer Strange

Trip Overview

The drive from San Antonio, TX to San Carlos, TX covers 231.6 miles and takes about 4h 10m behind the wheel. This route is realistic as a one-day drive if you keep your stops efficient.

The route leans on Lucian Adams Freeway, South Nueces Street, Falfurrias Expressway for much of the mileage, and the overall profile is highway-focused drive. The longest uninterrupted segment is about 66.8 miles on Lucian Adams Freeway. At current regular gas prices, budget about $35.00 one way before food or hotel costs.

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

115.8 miles from San Antonio, TX

A natural place for your longest stop of the day , about 2h 4m into the drive .

Who Is This Route For?

Weekend Trip

Doable as a same-day drive at 4h 10m. Total distance: 231.6 miles.

Family Friendly

Moderate complexity with 1 natural rest stops along the way.

Solo Traveler

4h 10m drive, comfortable solo distance.

Drive Character

This is a 4h 10m highway drive covering 231.6 miles, with most of the trip on Lucian Adams Freeway and South Nueces Street. The longest continuous stretch is about 66.8 miles on Lucian Adams Freeway.

Most of the miles stay on highways, which makes pacing and fuel planning easier than turn-by-turn city driving.
There are about 22 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
Lucian Adams Freeway is the longest continuous segment at about 66.8 miles.

How Hard Is This Drive?

This is a straightforward highway drive that stays mostly on Lucian Adams Freeway and South Nueces Street. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 0.8 miles in near Tower of the Americas Way.

Driving Effort 7/10

Demanding - plan breaks and stay ahead of the key maneuvers

Balances navigation complexity with total wheel time.

This is a demanding drive. With 11 significant decision points across 231.6 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 0.8 miles (Tower of the Americas Way): Lane positioning matters here; at 69.5 miles (US 281 South): Exit ramp - move to the correct lane early. Lane positioning matters here; at 160.4 miles (I 69C; US 281 / Falfurrias Expressway): Highway fork - watch signs carefully. Lane positioning matters here.

Critical Maneuvers

5 of 11 key points

These are the spots where you need to pay the most attention. Preview them before you drive.

5
0.8 mi into trip | ~1m in | Tower of the Americas Way

Turn right onto Tower of the Americas Way

Lane positioning matters here

Use the right lane.
6
69.5 mi into trip | ~1h 12m in | US 281 South

Take the exit onto US 281 South toward US 281 South

Exit ramp - move to the correct lane early. Lane positioning matters here

Use the straight / slight right lanes. Toward US 281 South
6
160.4 mi into trip | ~2h 52m in | I 69C; US 281 / Falfurrias Expressway

Keep slight left at fork onto I 69C; US 281 / Falfurrias Expressway

Highway fork - watch signs carefully. Lane positioning matters here

Use the straight / right lanes.
6
216.2 mi into trip | ~3h 51m in | I 69C; US 281

Keep slight left at fork onto I 69C; US 281

Highway fork - watch signs carefully. Lane positioning matters here

Use the straight / slight right lanes.
8
225.7 mi into trip | ~4h 1m in

Take the exit toward FM 2128: Chapin Road, Schunior Road, Richardson Road

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 7 Toward FM 2128: Chapin Road, Schunior Road, Ric...

Main Roads

Road Distance Duration
Lucian Adams Freeway 66.8 mi 1h 8m
South Nueces Street 66.2 mi 1h 10m
Falfurrias Expressway 55.8 mi 58m
I 69C 19.1 mi 20m
US 281 South 15.2 mi 19m
William J Bordelon Freeway 1.4 mi 1m
TX 107 1.4 mi 2m
East Richardson Road 1.2 mi 1m
Longest stretch: Lucian Adams Freeway — 66.8 mi, about 1h 8m

Turn-by-Turn Driving Directions

Step-by-step road directions between San Antonio, TX and San Carlos, TX.

1

Start on Dolorosa Street

143 ft · 4 sec · Dolorosa Street
2

Continue on West Market Street

0.4 mi · 42 sec · West Market Street
3

Continue on East Market Street

0.4 mi · 40 sec · East Market Street
4

Turn right onto Tower of the Americas Way

0.2 mi · 21 sec · Tower of the Americas Way
Use the right lane.
5

Take the ramp

0.3 mi · 33 sec
Toward I 37 South, US 281 South
6

Merge onto I 37; US 281

1.4 mi · 1 min · William J Bordelon Freeway
7

Continue on I 37; US 281

67 mi · 1 hr 8 min · Lucian Adams Freeway
Use the straight / slight right lanes.
8

Take the exit onto US 281 South

15 mi · 19 min · US 281 South
Toward US 281 South Use the straight / slight right lanes.
9

Keep slight left at fork onto US 281

66 mi · 1 hr 10 min · South Nueces Street
10

Keep slight left at fork onto I 69C; US 281

9.5 mi · 10 min · I 69C; US 281
11

Keep slight left at fork onto I 69C; US 281

56 mi · 58 min · Falfurrias Expressway
Use the straight / right lanes.
12

Keep slight left at fork onto I 69C; US 281

9.6 mi · 10 min · I 69C; US 281
Use the straight / slight right lanes.
13

Take the exit

0.3 mi · 28 sec
Exit 7 Toward FM 2128: Chapin Road, Schunior Road, Richardson Road Use the straight / slight right lanes.
14

Turn straight onto North Expressway 281

0.7 mi · 1 min · North Expressway 281
15

Turn left onto FM 2128

382 ft · 9 sec · East Schunior Street
16

Continue on FM 2128

1.2 mi · 1 min · East Richardson Road
Use the straight / left lanes.
17

Continue on FM 2128

0.8 mi · 1 min · East Richardson Street
18

Continue on FM 2128

0.5 mi · 42 sec · East Schunior Street
19

Continue on FM 2128

0.9 mi · 1 min · Richardson Road
20

At end of road, turn left onto TX 107

1.3 mi · 2 min · TX 107
21

Continue on TX 107

467 ft · 15 sec · TX 107
22

Arrive at destination

TX 107

Trip Plan

Morning Departure

An early start around 7-8 AM gets you there with plenty of daylight left.

Evening Departure

A late afternoon start means arriving after dark. Morning is better.

You can normally do this drive in one day.
Plan roughly 1 meaningful break for fuel, food, and rest.
The halfway point lands around 115.8 miles from San Antonio, TX, or about 2h 4m into the drive.
The longest continuous stretch on this route runs about 66.8 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 51 miles or 53m in

Use this first pause for coffee, a restroom break, and a quick traffic check ahead.

Halfway reset

Around 115.8 miles or 2h 4m in

This is the best place for your longest stop, a real meal, and a full fuel check.

Final approach

Final hour starts around 3h 23m

Traffic, exits, and arrival timing usually matter more near San Carlos, TX than in the middle of the route.

Before You Leave

+

Open the route before leaving San Antonio, 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 San Antonio, TX

This is one driving day of about 231.6 miles and 4h 10m.

Your first comfortable stop window is around 51 miles from San Antonio, 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 Lucian Adams Freeway for about 66.8 miles.

Where to Stop

Rest stops, refuel points, and overnight suggestions along this route.

Halfway Point

Midpoint

About 115.8 mi from San Antonio, TX · 2h 4m into the drive

Downtown Alice, TX, TX

Mid-route town

Meal stop

Alice, TX

116 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

Pleasanton, TX

Fuel and coffee

A short stop after about 51 miles helps settle the day before fatigue starts building.

Alice, TX

Meal break

The midpoint is around 115.8 miles from San Antonio, TX, which is a good place for a longer meal and fuel stop.

Before the longest stretch

Fuel check

Top up before Lucian Adams Freeway if your tank is already low. That segment runs about 66.8 miles.

Arriving in San Carlos, TX

The final approach into San Carlos, TX usually feels slower than the middle of the drive, so avoid planning your tightest schedule at the very end.

Try to arrive with enough fuel left to skip an immediate station stop unless you already know the area around San Carlos, TX.

These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.

National Parks Near This Route

Worth a detour if your schedule allows.

San Antonio Missions National Historical Park

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...

2 mi from route ~5 min detour Free near mile 8
View on nps.gov

Park data from the National Park Service API. Alerts update every 2 hours.

Fuel & Cost

Regular Gas

$35.00 one way

$69.99 round trip

$3.84/gal 25.4 MPG avg 81 kg CO2
Fuel Type $/gal One Way Round Trip
midgrade $4.20 $38.31 $76.61
premium $4.54 $41.35 $82.70
diesel $5.61 $51.13 $102.27

No toll roads detected on this route.

Estimated Trip Cost (one way, 1 person)

Fuel

$35

Meals

$25–$50

Total

$60–$85

Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.

Estimated CO2 emission: 81 kg one way. Prices: EIA weekly data, 2026-04-13.

Driving Electric?

About $24 in charging · 0 stops · 67% less CO2

Vehicle Type kWh Stops DC Fast Home Charge
Average EV 69.5 0 $24.32 $11.12
Efficient EV 57.9 0 $20.26 $9.26
EV Truck/SUV 92.6 1 $32.42 $14.82

Gas CO2

81 kg

EV CO2

27 kg (67% less)

Plan for 0 charging stops, roughly every 270 miles. Allow 25-40 minutes per stop at a DC fast charger.

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 16, 2026

Origin

San Antonio, TX

Night in San Antonio on Thursday

Local time

10:15 PM

CDT

Current temp

90°F

Partly Sunny

SSE 10 mph 0% chance Live forecast

Destination

San Carlos, TX

Night in San Carlos on Thursday

Local time

10:15 PM

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

20 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

4h 10m on the road

An early start around 7-8 AM gets you there with plenty of daylight left.

Weather data from the National Weather Service. Conditions may change; check closer to your travel date.

Frequently Asked Questions

The drive from San Antonio, TX to San Carlos, TX covers 231.6 miles and takes about 4h 10m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are Lucian Adams Freeway, South Nueces Street, Falfurrias Expressway. Most of the drive stays on highways, so watch for ramps and exits.
This is a comfortable same-day trip.
The midpoint is about 115.8 miles from San Antonio, TX. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $35.00 one way. This estimate uses 25.4 MPG — your actual cost will vary with your vehicle's fuel efficiency and current gas prices.
An early start around 7-8 AM gets you there with plenty of daylight left. A late afternoon start means arriving after dark. Morning is better.
Plan about 1 meaningful break for fuel, food, or rest. Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
This is a demanding drive. With 11 significant decision points across 231.6 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.
The main spots that need attention: at 0.8 miles (Tower of the Americas Way): Lane positioning matters here; at 69.5 miles (US 281 South): Exit ramp - move to the correct lane early. Lane positioning matters here; at 160.4 miles (I 69C; US 281 / Falfurrias Expressway): Highway fork - watch signs carefully. Lane positioning matters here.
The route from San Antonio, TX to San Carlos, TX does not surface many named destination signs beyond the main corridor.
Yes. Nearby national parks include San Antonio Missions National Historical Park.

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