How far is San Diego, TX from Montopolis, TX?
The driving distance from San Diego, TX to Montopolis, TX is about 218.1 miles (351 km), with a travel time of about 03h 18m by car.
- The straight-line flight distance is about 174.5 miles (280.8 km).
- For a round trip, plan for roughly 06h 36m 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 18m.
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 Karnes County, Texas, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Cloudy
Chance Showers And Thunderstorms
Driving Route Map
The map below follows the saved road route between San Diego and Montopolis.
Turn-by-Turn Driving Directions
Step-by-step road directions between San Diego and Montopolis.
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1
Start on the route
37 m · 4 sec
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2
Continue on East Gravis Avenue
8 mi · 9 min · East Gravis Avenue
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3
Turn left onto US Highway 281 Frontage Road
1072 ft · 29 sec · US Highway 281 Frontage Road
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4
Take the ramp straight
1019 ft · 25 sec
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5
Merge slight left
39.9 mi · 46 min
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6
Keep slight left to continue on Nueces Street
11.1 mi · 15 min · Nueces Street
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7
Turn right onto King David Drive
31.8 mi · 39 min · King David Drive
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8
Continue on West Main Street
1.2 km · 1 min · West Main Street
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9
Keep slight left to continue on East Main Street
71 m · 4 sec · East Main Street
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10
Continue on Helena Road
8.4 mi · 11 min · Helena Road
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11
Turn straight onto State Highway 80
23.6 mi · 26 min · State Highway 80
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12
Continue on South Nixon Avenue
1 mi · 2 min · South Nixon Avenue
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13
Continue on State Highway 80 North
30.8 mi · 35 min · State Highway 80 North
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14
Continue on US 183
10.1 mi · 12 min · US 183
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15
Continue on South Colorado Street
4.9 mi · 9 min · South Colorado Street
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16
Continue on United States Highway 183
1282 ft · 17 sec · United States Highway 183
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17
Keep slight left to continue on TX 130 Toll North: Austin, Waco
2447 ft · 35 sec
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18
Merge slight left onto Pickle Parkway
9.8 mi · 9 min · Pickle Parkway
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19
Take the exit slight right toward US 183 North: Austin
1920 ft · 47 sec
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20
Continue on US Highway 183 South
11.8 mi · 15 min · US Highway 183 South
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21
Continue on Bergstrom Expressway
1.1 km · 41 sec · Bergstrom Expressway
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22
Take the exit slight right toward Loop 111: Cesar Chavez Street, 5th Street, 6th Street, 7th Street, Airport Boulevard
2724 ft · 54 sec
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23
Keep slight right to continue on Airport Boulevard
1278 ft · 34 sec · Airport Boulevard
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24
Continue on Airport Boulevard
2658 ft · 43 sec · Airport Boulevard
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25
Continue on Ed Bluestein Boulevard
552 ft · 9 sec · Ed Bluestein Boulevard
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26
Take the ramp straight toward 183 Toll South: Lockhart
148 m · 12 sec
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27
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between San Diego and Montopolis.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
US Highway 281 Frontage Road
Merge slight left
39.9 mi · 00h 46m
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 Cloudy leaving San Diego and Chance Showers And Thunderstorms near Montopolis.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from San Diego to Montopolis?
The road trip is about 218.1 miles (351 km) and usually takes 03h 18m 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?
Karnes City is a useful midpoint, sitting about 98.1 miles from San Diego and 120 miles from Montopolis.
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 43.6 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 10:24 AM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $29.10 one way or $58.20 round trip. Estimated CO2 is about 68.4 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Cloudy around San Diego and Chance Showers And Thunderstorms near Montopolis.
Stop Ideas Near Karnes City
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 Karnes City.
San Antonio Station
San Marcos Station
Flight Path Map
This map shows the direct air route between San Diego and Montopolis. Straight-line distance: 174.48 mi (280.8 km).
#1 San Diego
City in Duval County, Texas, United States
| Population | 4,188 |
| Coordinates | 27.7639100, -98.2389000 |
| Altitude | 94 |
| Country | United States |
#2 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 |
End: 183 Toll (-97.690637, 30.243248)
Estimated Travel Time
Distance: 351 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 07h 16m |
| 40 mph (64.37 km/h) | 05h 27m |
| 50 mph (80.47 km/h) | 04h 21m |
| 60 mph (96.56 km/h) | 03h 38m |
| 70 mph (112.65 km/h) | 03h 06m |
| 80 mph (129 km/h) | 02h 43m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.78 | $29.10 | $58.20 |
| Mid-grade | $4.25 | $32.74 | $65.48 |
| Premium | $4.59 | $35.35 | $70.70 |
| Diesel | $3.99 | $30.75 | $61.49 |
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.