How far is El Cajon, CA from San Onofre, CA?
The driving distance from El Cajon, CA to San Onofre, CA is about 64.7 miles (104.1 km), with a travel time of about 01h 20m by car.
- The straight-line flight distance is about 53.7 miles (86.5 km).
- For a round trip, plan for roughly 02h 40m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 8:00 AM to 10:00 AM PDT.
Reverse, save, or send this route
This route works well as a day trip with time at the destination. Copy the route link, send it to another device, or print a clean version before you head out.
This route works well as a day trip with time at the destination.
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 01h 20m.
A morning start gives you useful time at the destination and keeps the return out of the late evening.
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 most populous city in San Diego County, California.
Route Weather Snapshot
Check the forecast at both ends before you head out.
Sunny
Driving Route Map
The map below follows the saved road route between El Cajon and San Onofre.
Turn-by-Turn Driving Directions
Step-by-step road directions between El Cajon and San Onofre.
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1
Start on South Magnolia Avenue
1 mi · 2 min · South Magnolia Avenue
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2
Continue on San Vicente Freeway
1.1 mi · 1 min · San Vicente Freeway
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3
Take the exit slight right toward CA 52 West: Prospect Avenue
880 ft · 21 sec
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4
Keep slight left to continue on CA 52 West
3194 ft · 46 sec
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5
Continue on San Clemente Canyon Freeway
12.9 mi · 15 min · San Clemente Canyon Freeway
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6
Take the exit slight right toward I 805 South, I 805 North
1746 ft · 23 sec
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7
Keep slight right to continue on I 805 North: Los Angeles
1534 ft · 20 sec
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8
Merge slight left onto Jacob Dekema Freeway
4.3 mi · 5 min · Jacob Dekema Freeway
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9
Keep slight left
1.3 km · 56 sec
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10
Merge slight right onto San Diego Freeway
35.4 mi · 42 min · San Diego Freeway
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11
Keep slight right to continue on San Diego Freeway
4.6 mi · 5 min · San Diego Freeway
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12
Take the exit slight right toward San Onofre, Basilone Road
1184 ft · 37 sec
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13
Turn left onto Basilone Road
142 m · 16 sec · Basilone Road
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14
Continue on Old Pacific Highway
1.8 mi · 4 min · Old Pacific Highway
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15
Continue on Old Pacific Highway
1.1 mi · 2 min · Old Pacific Highway
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16
Arrive at your destination
0 m · 1 sec · Old Pacific Highway
Car Route Details
A richer read on the saved driving route between El Cajon and San Onofre.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
San Diego Freeway
Merge slight right onto San Diego Freeway
35.4 mi · 00h 42m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A comfortable day-trip route
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
Sunny leaving El Cajon and Sunny near San Onofre.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from El Cajon to San Onofre?
The road trip is about 64.7 miles (104.1 km) and usually takes 01h 20m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
What is the halfway point on this route?
Encinitas is a useful midpoint, sitting about 32.4 miles from El Cajon and 32.4 miles from San Onofre.
How much longer is the road route than the straight-line distance?
The direct path is about 53.7 miles (86.5 km), while the road route adds roughly 11 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 8:00 AM to 10:00 AM PDT. If you want a more comfortable same-day return, try to leave by 3:50 PM PDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $14.28 one way or $28.55 round trip. Estimated CO2 is about 20.3 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around El Cajon and Sunny near San Onofre.
Stop Ideas Near Encinitas
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Inn at Moonlight Beach
Park Hyatt Aviara Resort, Golf Club & Spa
Escondido Building Department
Aviara Golf Club
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Encinitas.
Encinitas, CA
Solana Beach
Carlsbad Poinsettia, CA
Carlsbad Village station
Flight Path Map
This map shows the direct air route between El Cajon and San Onofre. Straight-line distance: 53.77 mi (86.53 km).
#1 El Cajon
The second most populous city in San Diego County, California.
| Population | 102,401 |
| Coordinates | 32.7947700, -116.9625300 |
| Altitude | 133 |
| Country | United States |
#2 San Onofre
Located on the Pacific coast of northern San Diego County at an elevation of roughly 30 feet, this area features rugged coastal bluffs overlooking San Onofre State Beach.
| Population | 0 |
| Coordinates | 33.3811400, -117.5731000 |
| Altitude | 9 |
| Country | United States |
End: San Onofre (-117.5731, 33.38114)
Estimated Travel Time
Distance: 104 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 02h 09m |
| 40 mph (64.37 km/h) | 01h 37m |
| 50 mph (80.47 km/h) | 01h 17m |
| 60 mph (96.56 km/h) | 01h 04m |
| 70 mph (112.65 km/h) | 00h 55m |
| 80 mph (129 km/h) | 00h 48m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $6.26 | $14.28 | $28.55 |
| Mid-grade | $6.50 | $14.82 | $29.64 |
| Premium | $6.69 | $15.25 | $30.50 |
| Diesel | $8.41 | $19.18 | $38.36 |
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 · Oct 15, 2026