Connecting Dallas and San Antonio, this 273.5-mile journey is a straightforward trek across the Texas Great Plains. You can expect to spend about 4 hours and 53 minutes behind the wheel, making it a manageable drive to complete in a single day. Budget roughly $41 for fuel to cover the trip, which primarily utilizes the I-35 corridor. Because the duration is under five hours, most travelers find it unnecessary to book an overnight stay unless they prefer a slower pace. The route is entirely contained within Texas, keeping you within the same regional landscape for the duration of your travel.
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
136.7 miles from Dallas, TX
A natural place for your longest stop of the day
, about 2h 22m into the drive
.
Step-by-step road directions between Dallas, TX and San Antonio, TX.
1
Start on North Lamar Street
0.2 mi·34 sec·North Lamar Street
2
Turn right onto Elm Street
0.2 mi·30 sec·Elm Street
3
Continue on Elm Street
0.1 mi·14 sec·Elm Street
4
Take the ramp
327 ft·7 sec
Toward I 30, I 35E
5
Keep slight left at fork
0.2 mi·20 sec
Toward I 30 West, I 35E SouthUse the straight / slight right lanes.
6
Keep slight right at fork
330 ft·8 sec
Toward I 35E SouthUse the slight left / slight right lanes.
7
Merge onto I 35E
0.8 mi·1 min·South Stemmons Freeway
Use the straight / slight right lanes.
8
Continue on I 35E
0.5 mi·44 sec·South R L Thornton Freeway
9
Continue on I 35E
89 mi·1 hr 31 min·South R L Thornton Freeway
Exit 426Toward Dallas ZooUse the straight / slight right lanes.
10
Continue on I 35; US 77
6.6 mi·7 min·North Jack Kultgen Expressway
Use the straight / slight right lanes.
11
Continue on I 35
38 mi·39 min·Purple Heart Trail
Use the straight / slight right lanes.
12
Keep slight left at fork onto I 35
56 mi·58 min·I 35
Use the straight / slight right lanes.
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
For the smoothest experience, plan your departure to avoid peak traffic congestion often found near the major urban centers at either end of the route. Since the drive is under five hours, a single planned stop is sufficient to keep you refreshed and alert. Keep a close eye on your fuel gauge during the longer stretches to ensure you aren't caught off guard between service points. Because this is a one-day trip, you have the flexibility to adjust your start time based on your personal preference for morning or afternoon driving. Remember that the 99.6-mile stretch on the Purple Heart Trail is your best opportunity to make significant time before hitting potential city-bound traffic.
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 136.7 miles from Dallas, TX, or about 2h 22m into the drive.
The longest continuous stretch on this route runs about 99.6 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 60 miles or 1h 3m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 136.7 miles or 2h 22m 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 56m
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 Dallas, 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 Dallas, TX
This is one driving day of about 273.5 miles and 4h 53m.
Your first comfortable stop window is around 60 miles from Dallas, 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 Purple Heart Trail for about 99.6 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 18
5 decision points cluster between mile 0.6 and 272.3 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
9
0.6 mi into trip|~1m in
Keep slight left at fork toward I 30 West, I 35E South
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / slight right lanes.
Toward I 30 West, I 35E South
8
0.8 mi into trip|~1m in
Keep slight right at fork toward I 35E South
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight left / slight right lanes.
Toward I 35E South
8
191.9 mi into trip|~3h 20m 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
8
271.8 mi into trip|~4h 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
272.3 mi into trip|~4h 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
$41.33 one way
$82.65 round trip
$3.84/gal25.4 MPG avg96 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.20
$45.24
$90.47
premium
$4.54
$48.83
$97.66
diesel
$5.61
$60.39
$120.77
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$41
Meals
$25–$50
Total
$66–$91
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 95.7 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $29 in charging
· 1 stop
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
82.1
1
$28.72
$13.13
Efficient EV
68.4
0
$23.93
$10.94
EV Truck/SUV
109.4
1
$38.29
$17.50
Gas CO2
96 kg
EV CO2
32 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.
Forecast as of Apr 18, 2026
Origin
Dallas, TX
Morning
in Dallas on Sunday
Local time
9:19 AM
CDT
Current temp
56°F
Mostly Cloudy then Chance Showers And Thunderstorms
SSW 10 to 15 mph66% chanceLive forecast
Special Weather Statement
Special Weather Statement issued April 18 at 12:44AM CDT by NWS Norman OK
Freeze Warning
Freeze Warning issued April 18 at 12:34AM CDT until April 18 at 9:00AM CDT by NWS Amarillo TX
Destination
San Antonio, TX
Morning
in San Antonio on Sunday
Local time
9:19 AM
CDT
Current temp
77°F
Unavailable
Live forecast
60°F
Belton, TX
137 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
21 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
4h 53m 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.
National Parks Near This Route
Worth a detour if your schedule allows.
Waco Mammoth National Monument
National Monument
Standing as tall as 14 feet and weighing 20,000 pounds, Columbian mammoths roamed across what is present-day Texas thousands of years ago. Today, the fossil specimens represent the nation's first and...
5 mi from route
~12 min detour
Free
near mile 94.3
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 273.5
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
This trip is a highway-focused drive, with 63% of your time spent on major thoroughfares like the South R L Thornton Freeway and the Purple Heart Trail. You will encounter a mix of fast-paced interstate travel and transitionary stretches that define the central Texas landscape. Be prepared for a consistent rhythm, as your longest uninterrupted segment covers 99.6 miles on the Purple Heart Trail. While the road personality is largely functional, the steady flow of the highway keeps your progress efficient. You should anticipate a predictable experience that prioritizes speed and directness over technical backroads.
63% highway — fuel and pacing are the main things to plan.
29 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 99.6 mi on Purple Heart Trail.
How Hard Is This Drive?
7/10
This is a straightforward highway drive that stays mostly on Purple Heart Trail and South R L Thornton Freeway. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 0.6 miles in.
Driving Effort7/10
Demanding - plan breaks and stay ahead of the key maneuvers
Balances navigation complexity with total wheel time.
This is a demanding drive. With 18 significant decision points across 273.5 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 0.6 miles: Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 0.8 miles: Highway fork - watch signs carefully. Lane positioning matters here; at 191.9 miles (I 35; US 290 / Purple Heart Trail): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one.
Dallas, with a population of more than 1.3 million residents, is the ninth largest city in the United States and the third largest in the state of Texas. It is an impressive melting pot of culture and character. Boasting high-end luxury hotels, innumerable fine dining spots, and one of the busiest airports in the world, Dallas maintains an upscale ethos reflected by an affluent population, world-class museums, and a shimmering modern skyline. Its history was marred by the infamous assassination of U.S. President John F. Kennedy, but there is more historic and contemporary heritage to be discovered in the city.
As a center of the oil and cotton industries in the late 1800s and early 1900s, Dallas was a classic American boom town and remains one of the fastest growing cities in the nation.
Top landmarks
•Dallas Museum of Art — art museum in Dallas, Texas
•Texas School Book Depository — building in Dallas, Texas, United States
•George W. Bush Presidential Center — Presidential library and museum for U.S. President George W. Bush, located in Da...
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 4h 53m. Total distance: 273.5 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
4h 53m drive, comfortable solo distance.
Frequently Asked Questions
The longest stretch is about 99.6 miles on Purple Heart Trail. The full list of main roads is in the Roads section above.
We did not find dedicated rest areas on this route. For a drive this long, plan bathroom and stretch breaks around gas stations, fast-food stops, or small-town downtowns — check the Nearby Places section for options.
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.
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. Dedicated rest areas are limited, so plan gas or food stops as your bathroom breaks.
The main spots that need attention: at 0.6 miles: Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 0.8 miles: Highway fork - watch signs carefully. Lane positioning matters here; at 191.9 miles (I 35; US 290 / Purple Heart Trail): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one.
Yes — Waco Mammoth National Monument and San Antonio Missions National Historical Park. See the National Parks section for detour distances and tips on detours.
Possible but tiring. At 4.9 hours each way, an in-and-out day trip would put you behind the wheel for 9.8 hours — manageable with a long break at San Antonio, TX, but most travelers stay overnight.
