Origin
Seadrift, TX
Late night in Seadrift on Tuesday
Local time
5:34 AM
CDT
Current temp
70°F
Unavailable
Live forecast
Trip from Seadrift, TX to San Antonio, TX
Pin this tripCompiled and reviewed by the US Trip Planner planning team at COD Solutions Oy · Last reviewed Apr 21, 2026 · Editorial standards
Drive Time
3h 9m
Distance
146.9 mi
236 km
Drive Score
8/10
Great drive
Same Day?
Yes, doable
Fuel Cost
$22
one way
EV Charging
Unknown
Best Time to Leave
4 AM
2h 58m
★
6 AM
3h 10m
8 AM
3h 33m
10 AM
3h 18m
12 PM
3h 15m
3 PM
3h 19m
5 PM
3h 32m
8 PM
3h 3m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Seadrift, TX
Action Construction Equipment Ltd. - ACE
San Antonio, TX
Wikimedia Commons
Trip Overview
This 146.9-mile drive from Seadrift, TX to San Antonio, TX will take approximately 3 hours and 9 minutes. It's a straightforward, highway-focused journey that's perfect for a single-day trip, with a manageable fuel cost estimated at $22. You'll primarily be on US 87 and State Highway 185 North. The route traverses the Great Plains region for both its origin and destination in Texas, offering a consistent landscape. With only one recommended stop, this drive is designed for efficient travel.
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
73.4 miles from Seadrift, TX
A natural place for your longest stop of the day , about 1h 40m into the drive .
Main Roads
| Road | Distance | Duration |
|---|---|---|
| US 87 | 76.5 mi | 1h 30m |
| State Highway 185 North | 30.9 mi | 48m |
| US Highway 87 North | 22.1 mi | 25m |
| North Main Street | 3.9 mi | 6m |
| West Heaton Street | 3.9 mi | 4m |
| East Broadway Street | 1.7 mi | 2m |
| Jose Lopez Freeway | 1.6 mi | 1m |
| William J Bordelon Freeway | 1.2 mi | 1m |
Longest stretch:
US 87
— 76.5 mi, about 1h 30m
Turn-by-Turn Driving Directions
Step-by-step road directions between Seadrift, TX and San Antonio, TX.
1
Start on South 4th Street
71 ft
·
8 sec
·
South 4th Street
2
Turn left onto TX 185
0.6 mi
·
1 min
·
West Broadway Avenue
3
Continue on TX 185
8.5 mi
·
14 min
·
State Highway 185 North
4
At end of road, turn right onto TX 35; TX 185
306 ft
·
10 sec
·
State Highway 35 South
5
Turn left onto TX 185
22 mi
·
33 min
·
State Highway 185 North
6
Turn left onto US 87
0.2 mi
·
17 sec
·
Port Lavaca Drive
7
Continue on US 87
0.3 mi
·
34 sec
·
East Goodwin Avenue
8
Turn right onto US 87
0.5 mi
·
50 sec
·
North Navarro Street
9
Turn left onto US 87; US 59 Bus; US 77 Bus
0.2 mi
·
19 sec
·
East Rio Grande Street
10
Turn right onto US 87
3.9 mi
·
6 min
·
North Main Street
11
Continue on US 87
22 mi
·
25 min
·
US Highway 87 North
12
Continue on US 87
1.7 mi
·
2 min
·
East Broadway Street
13
Turn left onto US 77 Alt; US 87; US 183
0.7 mi
·
59 sec
·
South Esplanade Street
14
Turn right onto TX 72
3.9 mi
·
4 min
·
West Heaton Street
15
Turn right onto US 87
76 mi
·
1 hr 29 min
·
US 87
16
Turn slight right onto US 87
0.6 mi
·
1 min
·
Roland Avenue
17
Turn left onto US 87
0.2 mi
·
30 sec
·
US 87
Toward I 10 West, US 90 West
Use the straight / left lanes.
18
Merge onto I 10; US 87; US 90
1.6 mi
·
1 min
·
Jose Lopez Freeway
Use the straight / slight right lanes.
19
Take the exit
0.1 mi
·
15 sec
Exit 574
Toward I 37, US 281: Corpus Christi, Johnson City
Use the slight right lane.
20
Keep slight right at fork
0.4 mi
·
45 sec
Toward I 37 North, US 281 North: Johnson City
Use the slight right lane.
21
Merge onto I 37; US 281
1.2 mi
·
1 min
·
William J Bordelon Freeway
22
Take the exit
0.3 mi
·
33 sec
Exit 141
Toward Commerce Street, Downtown, The Alamo
Use the straight / slight right lanes.
23
Turn straight onto Interstate 37 South
380 ft
·
11 sec
·
Interstate 37 South
24
Turn left onto East Commerce Street
0.9 mi
·
1 min
·
East Commerce Street
25
Turn left onto Military Plaza
392 ft
·
15 sec
·
Military Plaza
26
Turn left onto Dolorosa Street
327 ft
·
8 sec
·
Dolorosa Street
27
Arrive at destination
Dolorosa Street
Trip Plan
Given the 3-hour duration, this drive is easily accomplished in one day. To maximize your time, consider an early morning departure to avoid any potential midday congestion. The longest stretch without a town is over 76 miles, so ensure you have enough fuel before setting out from Seadrift. While the route data suggests only one stop, you have the flexibility to pull over as needed, especially since it's a relatively short trip. Keep an eye on US Highway 87 North as it becomes your primary road for a significant portion of the journey.
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 73.4 miles from Seadrift, TX, or about 1h 40m into the drive.
The longest continuous stretch on this route runs about 76.5 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 32 miles or 50m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 73.4 miles or 1h 40m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 2h 35m
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 Seadrift, 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 Seadrift, TX
This is one driving day of about 146.9 miles and 3h 9m.
Your first comfortable stop window is around 32 miles from Seadrift, 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 US 87 for about 76.5 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Mid-route town
Meal stop
73 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
Fuel and coffee
A short stop after about 32 miles helps settle the day before fatigue starts building.
Meal break
The midpoint is around 73.4 miles from Seadrift, TX, which is a good place for a longer meal and fuel stop.
Before the longest stretch
Fuel checkTop up before US 87 if your tank is already low. That segment runs about 76.5 miles.
These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.
Heads-up: tricky spots
5 of 165 decision points cluster between mile 9.1 and 145.5 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
5
9.1 mi into trip
|
~16m in
|
TX 35; TX 185 / State Highway 35 South
At end of road, turn right onto TX 35; TX 185 / State Highway 35 South
Navigation decision point
7
141.9 mi into trip
|
~3h 1m in
|
US 87
Turn left onto US 87 toward I 10 West, US 90 West
Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / left lanes.
Toward I 10 West, US 90 West
8
143.8 mi into trip
|
~3h 4m in
Take the exit toward I 37, US 281: Corpus Christi, Johnson City
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 574
Toward I 37, US 281: Corpus Christi, Johnson Ci...
8
143.9 mi into trip
|
~3h 4m in
Keep slight right at fork toward I 37 North, US 281 North: Johnson City
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight right lane.
Toward I 37 North, US 281 North: Johnson City
8
145.5 mi into trip
|
~3h 6m in
Take the exit toward Commerce Street, Downtown, The Alamo
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 141
Toward Commerce Street, Downtown, The Alamo
Fuel & Cost
Regular Gas
$22.20 one way
$44.39 round trip
$3.84/gal
25.4 MPG avg
51 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.20 | $24.30 | $48.59 |
| premium | $4.54 | $26.23 | $52.46 |
| diesel | $5.61 | $32.43 | $64.87 |
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$22
Meals
$25–$50
Total
$47–$72
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 51.4 kg one way. Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $15 in charging · 0 stops · 67% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 44.1 | 0 | $15.42 | $7.05 |
| Efficient EV | 36.7 | 0 | $12.85 | $5.88 |
| EV Truck/SUV | 58.8 | 0 | $20.57 | $9.40 |
Gas CO2
51 kg
EV CO2
17 kg (67% 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.
Destination
San Antonio, TX
Late night in San Antonio on Tuesday
Local time
5:34 AM
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
Very similar conditions
Both ends of the route are sitting at about the same temperature right now.
Road read
3h 9m on the road
Use the two city cards together: check the sky where you start, then compare it with the local time and temperature at arrival.
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...
6 mi from route
~16 min detour
Free
near mile 140.6
View on nps.gov
Park data from the National Park Service API. Alerts update every 2 hours.
What kind of drive is this?
Expect a highway-dominated experience, with 90% of the journey on major roads. The longest uninterrupted stretch is 76.5 miles, primarily on US 87 North. This highway-focused profile means you'll likely encounter steady traffic flow and consistent speed limits for most of the drive. While not explicitly scenic, the unbroken stretches of highway offer a predictable and efficient transit through the Texas landscape.
90% highway — fuel and pacing are the main things to plan.
27 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 76.5 mi on US 87.
How Hard Is This Drive?
6/10
This is a straightforward highway drive that stays mostly on US 87 and State Highway 185 North. You will hit about 16 points where you need to pay attention to lane position or signs. The trickiest moment comes around 9.1 miles in near TX 35; TX 185 / State Highway 35 South.
Driving Effort
6/10
Moderate - straightforward overall, but long enough or busy enough to require pacing
Balances navigation complexity with total wheel time.
This drive requires moderate attention. Across 146.9 miles you will encounter 16 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 9.1 miles (TX 35; TX 185 / State Highway 35 South): Navigation decision point; at 141.9 miles (US 87): Lane positioning matters here. Multiple destination signs - pick the right one; at 143.8 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one.
About the Cities
Arriving in San Antonio, TX
Full guide →Founded 1718
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
City content from Wikivoyage (CC BY-SA 4.0) and Wikidata (CC0).
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 3h 9m. Total distance: 146.9 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
3h 9m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (90%). Some complex stretches to watch for.
Frequently Asked Questions
The longest stretch is about 76.5 miles on US 87. 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 9.1 miles (TX 35; TX 185 / State Highway 35 South): Navigation decision point; at 141.9 miles (US 87): Lane positioning matters here. Multiple destination signs - pick the right one; at 143.8 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one.
Yes — San Antonio Missions National Historical Park. See the National Parks section for detour distances and tips on detours.
Possible but tiring. At 3.2 hours each way, an in-and-out day trip would put you behind the wheel for 6.3 hours — manageable with a long break at San Antonio, TX, but most travelers stay overnight.
How this page is built
Compiled by the US Trip Planner planning team at COD Solutions Oy from open government datasets — OSRM over OpenStreetMap for geometry, EIA for fuel prices, and NPS for national parks. See our methodology for refresh cadence and limitations.
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