Traveling from Baytown to San Antonio covers 222.2 miles across the Great Plains, typically taking around 3 hours and 21 minutes of drive time. Because the duration is relatively manageable, this route is perfectly suited for a single-day trip, allowing you to reach your destination without needing an overnight stay. You should budget approximately $33 for fuel to complete the journey. You will start by navigating local routes like Spur 330 West, Decker Drive, and the East Freeway before transitioning toward the San Antonio area. It is a straightforward trek that keeps you within the same region, making it an efficient choice for those looking to travel between these two Texas hubs.
Trip Pace
Same-day drive is realistic
A same-day return is realistic if you keep stops short.
Break Rhythm
1 planned break
A short stop every 2 to 3 hours is enough for this drive.
Midpoint
110 miles from Baytown, TX
A natural place for your longest stop of the day
, about 1h 58m into the drive
.
Main Roads
Road
Distance
Duration
Katy Freeway
175.2 mi
3h 2m
East Freeway
18.9 mi
23m
I 10
12 mi
12m
Decker Drive
6 mi
7m
East Commerce Street
4.3 mi
7m
Jose Lopez Freeway
1.6 mi
1m
90th Infantry Division Highway
0.8 mi
<1m
Interstate 10 East
0.3 mi
<1m
Longest stretch:
Katy Freeway
— 175.2 mi, about 3h 2m
Turn-by-Turn Driving Directions
Step-by-step road directions between Baytown, TX and San Antonio, TX.
1
Start on Decker Drive
1.3 mi·1 min·Decker Drive
2
Take the ramp
0.4 mi·27 sec
Toward Spur 330 West
3
Merge onto Spur 330
4.7 mi·5 min·Decker Drive
Use the straight / slight right lanes.
4
Merge onto I 10
19 mi·23 min·East Freeway
Use the straight / slight right lanes.
5
Continue on I 10; US 90
175 mi·3 hr 2 min·Katy Freeway
Use the straight lane.
6
Keep slight left at fork onto I 10; US 90; TX 130
12 mi·12 min·I 10; US 90; TX 130
Use the straight / slight right lanes.
7
Keep slight left at fork onto I 10; US 90; TX 130
0.8 mi·51 sec·90th Infantry Division Highway
Use the straight / slight right lanes.
8
Continue on I 10; US 90
1.6 mi·1 min·Jose Lopez Freeway
Use the straight / slight right lanes.
9
Take the exit
0.1 mi·19 sec
Exit 579Toward Commerce Street, Houston StreetUse the straight / slight right lanes.
10
Turn straight onto Interstate 10 East
0.3 mi·38 sec·Interstate 10 East
11
Turn right onto East Houston Street
0.2 mi·20 sec·East Houston Street
12
Turn slight left onto East Commerce Street
4.3 mi·7 min·East Commerce Street
13
Turn left onto Military Plaza
392 ft·15 sec·Military Plaza
14
Turn left onto Dolorosa Street
327 ft·8 sec·Dolorosa Street
15
Arrive at destination
Dolorosa Street
Trip Plan
Since this is a 222.2-mile journey, planning for at least one stop will help you stay refreshed during the 3-hour and 21-minute drive. Aim to depart early in the day to avoid peak congestion on the local roads that make up this route. Keep your $33 fuel budget in mind when planning your stops, and try to fill up before you hit the more urbanized sections of your path. Because the route relies on local roads rather than high-speed highways, prioritize patience and flexibility with your arrival time. A helpful tip for this specific drive is to keep a close eye on your navigation app, as the turn-heavy nature of the route requires frequent attention to your turns and road changes.
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 110 miles from Baytown, TX, or about 1h 58m into the drive.
The longest continuous stretch on this route runs about 175.2 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 48 miles or 54m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 110 miles or 1h 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 3h 12m
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 Baytown, 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 Baytown, TX
This is one driving day of about 220 miles and 3h 57m.
Your first comfortable stop window is around 48 miles from Baytown, 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 Katy Freeway for about 175.2 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 9
5 decision points cluster between mile 1.7 and 214.9 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
5
1.7 mi into trip|~2m in|Spur 330 / Decker Drive
Merge onto Spur 330 / Decker Drive
Merge point - match speed before joining. Lane positioning matters here
Use the straight / slight right lanes.
5
6.4 mi into trip|~7m in|I 10 / East Freeway
Merge onto I 10 / East Freeway
Merge point - match speed before joining. Lane positioning matters here
Use the straight / slight right lanes.
6
200.5 mi into trip|~3h 32m in|I 10; US 90; TX 130
Keep slight left at fork onto I 10; US 90; TX 130
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight right lanes.
6
212.6 mi into trip|~3h 45m in|I 10; US 90; TX 130 / 90th Infantry Division Highway
Keep slight left at fork onto I 10; US 90; TX 130 / 90th Infantry Division Highway
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight right lanes.
8
214.9 mi into trip|~3h 48m in
Take the exit toward Commerce Street, Houston Street
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 579
Toward Commerce Street, Houston Street
Fuel & Cost
Regular Gas
$33.24 one way
$66.49 round trip
$3.84/gal25.4 MPG avg77 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.20
$36.39
$72.77
premium
$4.54
$39.28
$78.56
diesel
$5.61
$48.57
$97.15
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$33
Meals
$25–$50
Total
$58–$83
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 77 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $23 in charging
· 0 stops
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
66
0
$23.10
$10.56
Efficient EV
55
0
$19.25
$8.80
EV Truck/SUV
88
1
$30.80
$14.08
Gas CO2
77 kg
EV CO2
26 kg (66% 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
Baytown, TX
Late night
in Baytown on Sunday
Local time
5:00 AM
CDT
Current temp
83°F
Unavailable
Live forecast
Destination
San Antonio, TX
Late night
in San Antonio on Sunday
Local time
5:00 AM
CDT
Current temp
90°F
Partly Sunny
SSE 10 mph0% chanceLive 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
7 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
3h 57m 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...
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
Expect a turn-heavy local drive rather than a monotonous interstate cruise, as this route features a 0% highway share. Because the longest stretch on any single road—Spur 330 West—is 0 miles, you will find yourself navigating frequent transitions between local roads and city streets. The character of the drive is defined by these constant adjustments rather than long, uninterrupted highway miles. You should stay alert as you maneuver through these local segments, which require more active focus than a standard high-speed commute. This technical, winding progression keeps the trip engaging as you make your way across the landscape.
95% highway — fuel and pacing are the main things to plan.
15 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 175.2 mi on Katy Freeway.
How Hard Is This Drive?
7/10
This is a straightforward highway drive that stays mostly on Katy Freeway and East Freeway. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 1.7 miles in near Spur 330 / Decker Drive.
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 9 significant decision points across 220 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 1.7 miles (Spur 330 / Decker Drive): Merge point - match speed before joining. Lane positioning matters here; at 6.4 miles (I 10 / East Freeway): Merge point - match speed before joining. Lane positioning matters here; at 200.5 miles (I 10; US 90; TX 130): Highway fork - watch signs carefully. Lane positioning matters here.
Baytown is a city in Texas. When you are in Baytown, you can rest assured you are in one of the most industrialized places of the world. With Exxon's Baytown Refinery on the west, Chevron's Cedar Bayou Plant on the northeast, the Covestro Baytown Industrial Plant on the east, and a smattering of other industries in between, you're likely to see flare stacks and storage tanks or tanker cars wherever you go, and might think you need a gas mask. But, in spite of this, there are still natural and cultural attractions to behold. And Garey Busey and Renee Zellweger used to call this place home.
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 3h 57m. Total distance: 220 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
3h 57m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (95%). Some complex stretches to watch for.
Frequently Asked Questions
The longest stretch is about 175.2 miles on Katy Freeway. 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 1.7 miles (Spur 330 / Decker Drive): Merge point - match speed before joining. Lane positioning matters here; at 6.4 miles (I 10 / East Freeway): Merge point - match speed before joining. Lane positioning matters here; at 200.5 miles (I 10; US 90; TX 130): 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.
Possible but tiring. At 4.0 hours each way, an in-and-out day trip would put you behind the wheel for 7.9 hours — manageable with a long break at San Antonio, TX, but most travelers stay overnight.
