How far is Boron, CA from San Diego, CA?
The driving distance from Boron, CA to San Diego, CA is about 187.7 miles (302.1 km), with a travel time of about 03h 27m by car.
- The straight-line flight distance is about 160.3 miles (257.9 km).
- For a round trip, plan for roughly 06h 54m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 8:00 AM PDT.
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 27m.
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.
The fifth most populous city in Riverside County, California.
Route Weather Snapshot
Check the forecast at both ends before you head out.
Slight Chance Rain Showers then Mostly Sunny
Driving Route Map
The map below follows the saved road route between Boron and San Diego.
Turn-by-Turn Driving Directions
Step-by-step road directions between Boron and San Diego.
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1
Start on Boron Avenue
1.1 km · 1 min · Boron Avenue
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2
Take the ramp left
1095 ft · 27 sec
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3
Merge slight left onto Mojave-Barstow Highway
1.6 km · 1 min · Mojave-Barstow Highway
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4
Continue on Barstow-Bakersfield Highway
5.2 mi · 6 min · Barstow-Bakersfield Highway
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5
Take the exit slight right toward US 395: Bishop, San Bernardino
1715 ft · 1 min
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6
Turn left onto Blue Star Memorial Highway
41.6 mi · 52 min · Blue Star Memorial Highway
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7
Take the exit straight toward I 15 South: San Bernardino, Los Angeles
1.1 km · 1 min
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8
Merge slight left onto Barstow and Mojave Freeway
3.4 mi · 4 min · Barstow and Mojave Freeway
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9
Continue on CHP Officer Larry L. Wetterling and San Bernardino County Sheriff's Lieutenant Alfred E. Stewart Memorial Highway
5.6 mi · 6 min · CHP Officer Larry L. Wetterling and San Bernardino County Sheriff's Lieutenant Alfred E. Stewart Memorial Highway
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10
Continue on Barstow and Mojave Freeway
6.3 mi · 7 min · Barstow and Mojave Freeway
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11
Continue on Barstow Freeway
1095 ft · 13 sec · Barstow Freeway
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12
Keep slight left to continue on Barstow Freeway
9.3 mi · 10 min · Barstow Freeway
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13
Continue on San Bernardino Freeway
5.6 mi · 6 min · San Bernardino Freeway
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14
Continue on Riverside Freeway
5.3 mi · 6 min · Riverside Freeway
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15
Take the exit slight right toward I 215 South, CA 60 East: San Diego, Indio
5.1 mi · 6 min
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16
Keep slight right to continue on I 215, CA 60 Truck
2512 ft · 33 sec
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17
Keep slight right
36.3 mi · 41 min
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18
Continue on Avocado Highway
21.9 mi · 24 min · Avocado Highway
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19
Continue on Escondido Freeway
3.4 mi · 4 min · Escondido Freeway
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20
Keep slight right to continue on Escondido Freeway
8.7 mi · 10 min · Escondido Freeway
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21
Continue on Tony Gwynn Memorial Freeway
4.5 mi · 5 min · Tony Gwynn Memorial Freeway
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22
Continue on Escondido Freeway
3.1 mi · 4 min · Escondido Freeway
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23
Continue on Semper Fi Highway
2.2 mi · 3 min · Semper Fi Highway
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24
Take the exit slight right toward CA 163 South
1.2 km · 52 sec
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25
Continue on Cabrillo Freeway
8.2 mi · 9 min · Cabrillo Freeway
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26
Continue on Cabrillo Parkway
1.5 mi · 2 min · Cabrillo Parkway
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27
Continue on Cabrillo Parkway
1.3 km · 1 min · Cabrillo Parkway
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28
Continue on 10th Avenue
1507 ft · 42 sec · 10th Avenue
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29
Turn right onto Broadway
2811 ft · 1 min · Broadway
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30
Turn left onto Front Street
8 m · 1 sec · Front Street
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31
Arrive at your destination
0 m · 1 sec · Front Street
Car Route Details
A richer read on the saved driving route between Boron 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.
Blue Star Memorial Highway
Turn left onto Blue Star Memorial Highway
41.6 mi · 00h 52m
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.
Sunny leaving Boron and Slight Chance Rain Showers then Mostly Sunny near San Diego.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Boron to San Diego?
The road trip is about 187.7 miles (302.1 km) and usually takes 03h 27m 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?
Moreno Valley is a useful midpoint, sitting about 91.7 miles from Boron and 96 miles from San Diego.
How much longer is the road route than the straight-line distance?
The direct path is about 160.3 miles (257.9 km), while the road route adds roughly 27.4 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 PDT. If you want a more comfortable same-day return, try to leave by 10:06 AM PDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $38.25 one way or $76.50 round trip. Estimated CO2 is about 58.9 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Boron and Slight Chance Rain Showers then Mostly Sunny near San Diego.
Stop Ideas Near Moreno Valley
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
City Hall
Loma Linda City Hall
City of Loma Linda Fire Station 251
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Moreno Valley.
Moreno Valley, California
Riverside–Downtown
Perris, California
San Bernardino Santa Fe Depot
Flight Path Map
This map shows the direct air route between Boron and San Diego. Straight-line distance: 160.23 mi (257.86 km).
#1 Boron
Census-designated place in Kern County, California
| Population | 2,253 |
| Coordinates | 34.9994200, -117.6497800 |
| Altitude | 752 |
| Country | United States |
#2 San Diego
The eighth most populous city in the United States and the center of the San Diego metropolitan area.
| Population | 1,422,420 |
| Coordinates | 32.7157100, -117.1647200 |
| Altitude | 20 |
| Country | United States |
End: Front Street (-117.164717, 32.71571)
Estimated Travel Time
Distance: 302 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 06h 15m |
| 40 mph (64.37 km/h) | 04h 41m |
| 50 mph (80.47 km/h) | 03h 45m |
| 60 mph (96.56 km/h) | 03h 07m |
| 70 mph (112.65 km/h) | 02h 40m |
| 80 mph (129 km/h) | 02h 20m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $5.77 | $38.25 | $76.50 |
| Mid-grade | $6.07 | $40.22 | $80.44 |
| Premium | $6.24 | $41.39 | $82.78 |
| Diesel | $7.57 | $50.17 | $100.34 |
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 California · Apr 11, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.