How far is Montopolis, TX from San Diego, TX?
The driving distance from Montopolis, TX to San Diego, TX is about 216.2 miles (347.9 km), with a travel time of about 03h 45m by car.
- The straight-line flight distance is about 174.5 miles (280.8 km).
- For a round trip, plan for roughly 07h 30m 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 45m.
An early departure helps you fit a real stop into the day without turning the return into a late-night drive.
This departure sits inside the recommended comfort window for the route.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
City in Bexar County, Texas, United States of America
Route Weather Snapshot
Check the forecast at both ends before you head out.
Chance Showers And Thunderstorms
Mostly Cloudy
Driving Route Map
The map below follows the saved road route between Montopolis and San Diego.
Turn-by-Turn Driving Directions
Step-by-step road directions between Montopolis and San Diego.
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1
Start on 183 Toll South: Lockhart
67 m · 5 sec
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2
Merge slight left onto Bergstrom Expressway
1.3 km · 47 sec · Bergstrom Expressway
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3
Continue on Bastrop Highway
11.7 mi · 15 min · Bastrop Highway
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4
Take the ramp straight toward TX 130 Toll South: Lockhart, San Antonio
1565 ft · 38 sec
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5
Merge slight left onto Pickle Parkway
37.4 mi · 33 min · Pickle Parkway
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6
Keep slight right to continue on I 10 West: San Antonio
3262 ft · 1 min
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7
Merge slight left
11.1 mi · 11 min
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8
Continue straight
9.4 mi · 9 min
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9
Keep slight left
12 mi · 13 min
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10
Keep slight right to continue on Connally Loop
1.4 mi · 2 min · Connally Loop
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11
Merge slight left onto Connally Loop
6.7 mi · 7 min · Connally Loop
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12
Take the exit slight right toward I 37, US 281 North: San Antonio, Corpus Christi
1184 ft · 29 sec
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13
Keep slight left to continue on I 37 South: Corpus Christi
2457 ft · 1 min
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14
Merge slight left
60.5 mi · 1 hr 1 min
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15
Take the exit slight right toward US 281 South
15.2 mi · 19 min
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16
Keep slight left to continue on South Nueces Street
40 mi · 41 min · South Nueces Street
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17
Take the exit slight right toward TX 44, TX 359: Alice, San Diego
1833 ft · 49 sec
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18
Turn right
7.9 mi · 9 min
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19
Turn left onto South Doctor E.E. Dunlap Street
38 m · 10 sec · South Doctor E.E. Dunlap Street
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20
Take the ramp sharp left
11 m · 1 sec
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21
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Montopolis and San Diego.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
I 37 South
Merge slight left
60.5 mi · 01h 01m
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.
Chance Showers And Thunderstorms leaving Montopolis and Mostly Cloudy near San Diego.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Montopolis to San Diego?
The road trip is about 216.2 miles (347.9 km) and usually takes 03h 45m 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?
Sandy Oaks is a useful midpoint, sitting about 108.2 miles from Montopolis and 107.9 miles from San Diego.
How much longer is the road route than the straight-line distance?
The direct path is about 174.5 miles (280.8 km), while the road route adds roughly 41.7 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 9:30 AM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $28.83 one way or $57.67 round trip. Estimated CO2 is about 67.8 kg one way.
What should you check before leaving?
Before you leave, expect Chance Showers And Thunderstorms around Montopolis and Mostly Cloudy near San Diego.
Stop Ideas Near Sandy Oaks
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 Sandy Oaks.
San Antonio Station
San Marcos Station
Flight Path Map
This map shows the direct air route between Montopolis and San Diego. Straight-line distance: 174.48 mi (280.8 km).
#1 Montopolis
This Travis County community, situated at an elevation of 469 feet, is known for its Colorado River industrial areas.
| Population | 912,791 |
| Coordinates | 30.2432700, -97.6905600 |
| Altitude | 143 |
| Country | United States |
#2 San Diego
City in Duval County, Texas, United States
| Population | 4,188 |
| Coordinates | 27.7639100, -98.2389000 |
| Altitude | 94 |
| Country | United States |
End: San Diego (-98.2389, 27.76391)
Estimated Travel Time
Distance: 348 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 07h 12m |
| 40 mph (64.37 km/h) | 05h 24m |
| 50 mph (80.47 km/h) | 04h 19m |
| 60 mph (96.56 km/h) | 03h 36m |
| 70 mph (112.65 km/h) | 03h 05m |
| 80 mph (129 km/h) | 02h 41m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.78 | $28.83 | $57.67 |
| Mid-grade | $4.25 | $32.44 | $64.89 |
| Premium | $4.59 | $35.03 | $70.06 |
| Diesel | $3.99 | $30.47 | $60.93 |
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 · Apr 30, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.