How far is Conroe, TX from San Antonio, TX?
The driving distance from Conroe, TX to San Antonio, TX is about 226 miles (363.7 km), with a travel time of about 03h 22m by car.
- The straight-line flight distance is about 192.1 miles (309.1 km).
- For a round trip, plan for roughly 06h 44m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 8:00 AM CDT.
Reverse, save, or send this route
This drive is better planned with a longer stop or an overnight stay. Copy the route link, send it to another device, or print a clean version before you head out.
This drive is better planned with a longer stop or an overnight stay.
Flight Distance
Driving Distance
Gas Cost Calculator
Leave and Arrive Planner
Pick a departure time to see your estimated arrival and same-day return window.
Drive time stays fixed at 03h 22m.
An early departure helps you fit a real stop into the day without turning the return into a late-night drive.
You are leaving earlier than the recommended window, which gives you extra margin for breaks and traffic.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
City in Texas, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Conroe and San Antonio.
Turn-by-Turn Driving Directions
Step-by-step road directions between Conroe and San Antonio.
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1
Start on North Pacific Street
1131 ft · 53 sec · North Pacific Street
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2
Turn left onto North Main Street
1654 ft · 46 sec · North Main Street
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3
Turn right onto Mill Avenue
663 ft · 25 sec · Mill Avenue
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4
Turn left onto South Frazier Street
1.6 mi · 3 min · South Frazier Street
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5
Turn right onto South Loop 336 West
615 ft · 19 sec · South Loop 336 West
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6
Turn left onto Interstate 45 North Frontage Road
135 m · 11 sec · Interstate 45 North Frontage Road
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7
Take the ramp straight toward I 45 South
1012 ft · 25 sec
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8
Merge slight left
12 mi · 14 min
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9
Take the exit slight right toward 99 Toll West: Grand Parkway
1 mi · 2 min
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10
Keep slight left
1266 ft · 31 sec
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11
Merge slight left onto North Grand Parkway West
37.8 mi · 41 min · North Grand Parkway West
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12
Take the exit slight right toward I 10 East, I 10 West: Houston, San Antonio
3149 ft · 1 min
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13
Keep slight right to continue on I 10 West: San Antonio
1.1 km · 1 min
-
14
Merge slight left onto Katy Freeway
149.1 mi · 2 hr 30 min · Katy Freeway
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15
Keep slight left
12 mi · 13 min
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16
Keep slight left to continue on 90th Infantry Division Highway
1.2 km · 52 sec · 90th Infantry Division Highway
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17
Continue on Jose Lopez Freeway
1.6 mi · 2 min · Jose Lopez Freeway
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18
Take the exit slight right toward Commerce Street, Houston Street
790 ft · 19 sec
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19
Turn straight onto Interstate 10 East
1830 ft · 39 sec · Interstate 10 East
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20
Turn right onto East Houston Street
963 ft · 20 sec · East Houston Street
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21
Turn slight left onto East Commerce Street
4.3 mi · 7 min · East Commerce Street
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22
Turn left onto Military Plaza
119 m · 16 sec · Military Plaza
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23
Turn left onto Dolorosa Street
100 m · 8 sec · Dolorosa Street
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24
Arrive at your destination
0 m · 1 sec · Dolorosa Street
Car Route Details
A richer read on the saved driving route between Conroe and San Antonio.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
Katy Freeway
Merge slight left onto Katy Freeway
149 mi · 02h 30m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A longer out-and-back drive
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
Mostly Sunny leaving Conroe and Mostly Sunny near San Antonio.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Conroe to San Antonio?
The road trip is about 226 miles (363.7 km) and usually takes 03h 22m in normal driving conditions.
Is this a same-day trip or an overnight route?
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
What is the halfway point on this route?
Weimar is a useful midpoint, sitting about 111.7 miles from Conroe and 114.2 miles from San Antonio.
How much longer is the road route than the straight-line distance?
The direct path is about 192.1 miles (309.1 km), while the road route adds roughly 33.9 extra miles because roads do not follow the straight air line.
When is the best time to leave for this route?
A good departure window is usually 6:00 AM to 8:00 AM CDT. If you want a more comfortable same-day return, try to leave by 10:16 AM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $30.12 one way or $60.24 round trip. Estimated CO2 is about 70.8 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Conroe and Mostly Sunny near San Antonio.
Stop Ideas Near Weimar
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Weimar.
Prairie View, TX
Austin
San Marcos Station
Taylor
Flight Path Map
This map shows the direct air route between Conroe and San Antonio. Straight-line distance: 192.05 mi (309.07 km).
#1 Conroe
The third most populous city in Montgomery County, Texas.
| Population | 96,214 |
| Coordinates | 30.3118800, -95.4560500 |
| Altitude | 67 |
| Country | United States |
#2 San Antonio
The seventh most populous city in the United States and the center of the San Antonio metropolitan area.
| Population | 1,567,118 |
| Coordinates | 29.4241200, -98.4936300 |
| Altitude | 198 |
| Country | United States |
End: Dolorosa Street (-98.493645, 29.424163)
Estimated Travel Time
Distance: 364 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 07h 31m |
| 40 mph (64.37 km/h) | 05h 38m |
| 50 mph (80.47 km/h) | 04h 31m |
| 60 mph (96.56 km/h) | 03h 45m |
| 70 mph (112.65 km/h) | 03h 13m |
| 80 mph (129 km/h) | 02h 49m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.78 | $30.12 | $60.24 |
| Mid-grade | $4.25 | $33.89 | $67.78 |
| Premium | $4.59 | $36.59 | $73.18 |
| Diesel | $3.99 | $31.82 | $63.65 |
Assumes 8.3 L/100 km (about 28.3 MPG). CO2 is an estimate and varies by vehicle, fuel blend, traffic, and terrain.
Prices in Texas · May 04, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.