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Trip from San Antonio, TX to Mercedes, TX

Data updated 0 seconds ago

Drive Time

4h 31m

Distance

251.9 mi

405 km

Drive Score

9/10

Great drive

Same Day?

Yes, doable

Fuel Cost

$38

one way

EV Charging

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station data

Best Time to Leave

Save up to 40 min
4 AM
4h 18m ★
6 AM
4h 32m
8 AM
4h 58m
10 AM
4h 41m
12 PM
4h 38m
3 PM
4h 42m
5 PM
4h 57m
8 PM
4h 24m

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

city in Texas, USA

Mercedes, TX

Wikimedia Commons

Trip Overview

The drive from San Antonio, TX to Mercedes, TX covers 251.9 miles and takes about 4h 31m 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 $38.06 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

126 miles from San Antonio, TX

A natural place for your longest stop of the day , about 2h 15m into the drive .

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Drive Character

This is a 4h 31m highway drive covering 251.9 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 18 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.

Route Complexity 8/10

Demanding - plan breaks and stay ahead of the key maneuvers

This is a demanding drive. With 11 significant decision points across 251.9 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.
7
251 mi into trip | ~4h 29m in

Take the exit toward FM 491: Texas Avenue

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

Use the slight right lane. Exit 163B Toward FM 491: Texas Avenue

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 27.9 mi 30m
I 2 15.9 mi 17m
US 281 South 15.2 mi 19m
William J Bordelon Freeway 1.4 mi 1m
I 2 East 0.5 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 Mercedes, 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

18 mi · 20 min · I 69C; US 281
Use the straight / slight right lanes.
13

Merge onto I 2 East; US 83 East

0.5 mi · 33 sec · I 2 East; US 83 East
14

Continue on I 2; US 83

16 mi · 17 min · I 2; US 83
Use the straight / slight right lanes.
15

Take the exit

0.4 mi · 48 sec
Exit 163B Toward FM 491: Texas Avenue Use the slight right lane.
16

Turn straight onto Expressway 83

0.1 mi · 17 sec · Expressway 83
17

Turn right onto FM 491

0.4 mi · 46 sec · North Texas Avenue
18

Arrive at destination

South Texas Avenue

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 126 miles from San Antonio, TX, or about 2h 15m 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 80 miles or 1h 25m in

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

Halfway reset

Around 126 miles or 2h 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 3h 41m

Traffic, exits, and arrival timing usually matter more near Mercedes, 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 251.9 miles and 4h 31m.

Your first comfortable stop window is around 80 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 126 mi from San Antonio, TX · 2h 15m into the drive

city and county seat of Nueces County, Texas, United States

Mid-route town

Meal stop

Corpus Christi, TX

126 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

Corpus Christi, TX

Fuel and coffee

A short stop after about 80 miles helps settle the day before fatigue starts building.

Corpus Christi, TX

Meal break

The midpoint is around 126 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 Mercedes, TX

The final approach into Mercedes, 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 Mercedes, TX.

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

Fuel & Cost

Regular Gas

$38.06 one way

$76.13 round trip

$3.84/gal 25.4 MPG avg 88 kg CO2
Fuel Type $/gal One Way Round Trip
midgrade $4.20 $41.66 $83.33
premium $4.54 $44.98 $89.95
diesel $5.61 $55.62 $111.23

No toll roads detected on this route.

Estimated Trip Cost (one way, 1 person)

Fuel

$38

Meals

$25–$50

Total

$63–$88

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

Estimated CO2 emission: 88.1 kg one way. Prices: EIA weekly data, 2026-04-13.

Driving Electric?

About $26 in charging · 0 stops · 67% less CO2

Vehicle Type kWh Stops DC Fast Home Charge
Average EV 75.6 0 $26.45 $12.09
Efficient EV 63 0 $22.04 $10.08
EV Truck/SUV 100.8 1 $35.27 $16.12

Gas CO2

88 kg

EV CO2

29 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 data refreshed 1 day ago

Origin

San Antonio, TX

Late night in San Antonio on Wednesday

Local time

5:06 AM

CDT

Current temp

85°F

Mostly Cloudy then Slight Chance Showers And Thunderstorms

SSE 5 to 10 mph 15% chance Live forecast

High Wind Watch

High Wind Watch issued April 12 at 11:58PM MDT until April 14 at 9:00PM MDT by NWS Midland/Odessa TX

Red Flag Warning

Red Flag Warning issued April 13 at 12:38AM CDT until April 13 at 8:00PM CDT by NWS Amarillo TX

Destination

Mercedes, TX

Late night in Mercedes on Wednesday

Local time

5:06 AM

CDT

Current temp

81°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

4 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 31m 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 Mercedes, TX covers 251.9 miles and takes about 4h 31m 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 126 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 $38.06 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 251.9 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 Mercedes, TX does not surface many named destination signs beyond the main corridor.

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Return Trip

Mercedes, TX to San Antonio, TX

Plan the drive back the other way.

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