How far is Los Alamos, CA from San Diego, CA?
The driving distance from Los Alamos, CA to San Diego, CA is about 263.2 miles (423.5 km), with a travel time of about 04h 46m by car.
- The straight-line flight distance is about 227.2 miles (365.7 km).
- For a round trip, plan for roughly 09h 33m 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 04h 46m.
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 Los Angeles County, California, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Driving Route Map
The map below follows the saved road route between Los Alamos and San Diego.
Turn-by-Turn Driving Directions
Step-by-step road directions between Los Alamos and San Diego.
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1
Start on Leslie Street
115 m · 23 sec · Leslie Street
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2
Turn left onto Bell Street
1909 ft · 34 sec · Bell Street
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3
Turn left onto Foxen Lane
67 m · 4 sec · Foxen Lane
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4
Take the ramp right
1195 ft · 33 sec
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5
Merge slight left
7.3 mi · 8 min
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6
Take the exit slight right toward CA 154: Los Olivos, Lake Cachuma
1266 ft · 39 sec
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7
Turn left onto Chumash Highway
6.4 mi · 10 min · Chumash Highway
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8
Enter the roundabout and take exit 2 toward Chumash Highway
39 m · 2 sec · Chumash Highway
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9
Exit the roundabout onto Chumash Highway
2.2 mi · 3 min · Chumash Highway
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10
Enter the roundabout and take exit 2 toward Chumash Highway
35 m · 2 sec · Chumash Highway
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11
Exit the roundabout onto Chumash Highway
23.9 mi · 33 min · Chumash Highway
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12
Take the ramp slight left toward US 101 South
1206 ft · 32 sec
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13
Merge slight left onto El Camino Real
17 mi · 20 min · El Camino Real
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14
Continue on Ventura Freeway
65.2 mi · 1 hr 15 min · Ventura Freeway
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15
Take the exit slight right toward I 405 North, I 405 South: Sacramento, Santa Monica
758 ft · 19 sec
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16
Keep slight right to continue on I 405 South: San Diego Freeway, Santa Monica
1584 ft · 39 sec
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17
Keep slight left to continue on I 405 South: San Diego Freeway
553 ft · 14 sec
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18
Merge slight left onto San Diego Freeway
13.3 mi · 15 min · San Diego Freeway
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19
Keep slight right to continue on San Diego Freeway
26.5 mi · 31 min · San Diego Freeway
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20
Keep slight right to continue on San Diego Freeway
2.3 mi · 3 min · San Diego Freeway
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21
Keep slight left to continue on San Diego Freeway
893 ft · 12 sec · San Diego Freeway
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22
Keep slight left
10.3 mi · 12 min
-
23
Keep slight right to continue on Corona Del Mar Freeway
4 mi · 5 min · Corona Del Mar Freeway
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24
Continue on San Joaquin Hills Transportation Corridor
10.3 mi · 12 min · San Joaquin Hills Transportation Corridor
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25
Take the exit slight right toward La Paz Road, Moulton Parkway
133 m · 6 sec
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26
Keep slight left to continue on CA 73 South: Moulton Parkway
2519 ft · 33 sec
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27
Keep slight left to continue on CA 73 South
3218 ft · 42 sec
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28
Merge slight left onto San Joaquin Hills Transportation Corridor
2.5 mi · 3 min · San Joaquin Hills Transportation Corridor
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29
Merge slight left onto San Diego Freeway
67.8 mi · 1 hr 19 min · San Diego Freeway
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30
Take the exit slight right toward Front Street, Civic Center, 2nd Avenue
1164 ft · 28 sec
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31
Keep slight right to continue on Front Street, Civic Center
592 ft · 15 sec
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32
Continue on Front Street
2662 ft · 2 min · Front Street
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33
Arrive at your destination
0 m · 1 sec · Front Street
Car Route Details
A richer read on the saved driving route between Los Alamos 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.
San Diego Freeway
Merge slight left onto San Diego Freeway
67.8 mi · 01h 19m
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 Los Alamos and Sunny near San Diego.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Los Alamos to San Diego?
The road trip is about 263.2 miles (423.5 km) and usually takes 04h 46m 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?
Beverly Hills is a useful midpoint, sitting about 131.1 miles from Los Alamos and 132 miles from San Diego.
How much longer is the road route than the straight-line distance?
The direct path is about 227.2 miles (365.7 km), while the road route adds roughly 36 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 7:26 AM PDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $58.16 one way or $116.33 round trip. Estimated CO2 is about 82.6 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Los Alamos and Sunny near San Diego.
Stop Ideas Near Beverly Hills
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Beverly Wilshire, A Four Seasons Hotel
City of Beverly Hills Parking Lot
City of Los Angeles
Vernon City Hall
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Beverly Hills.
Westwood-UCLA, CA
Westchester, CA
Burbank Airport–South station
Glendale Transportation Center
Flight Path Map
This map shows the direct air route between Los Alamos and San Diego. Straight-line distance: 227.26 mi (365.74 km).
#1 Los Alamos
Situated in Santa Barbara County's Santa Ynez Valley at an elevation of 571 feet, this census-designated place lies within a region dominated by agriculture and viticulture.
| Population | 0 |
| Coordinates | 34.7444300, -120.2782100 |
| Altitude | 174 |
| 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: 423 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 08h 46m |
| 40 mph (64.37 km/h) | 06h 34m |
| 50 mph (80.47 km/h) | 05h 15m |
| 60 mph (96.56 km/h) | 04h 23m |
| 70 mph (112.65 km/h) | 03h 45m |
| 80 mph (129 km/h) | 03h 16m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $6.26 | $58.16 | $116.33 |
| Mid-grade | $6.50 | $60.38 | $120.75 |
| Premium | $6.69 | $62.14 | $124.28 |
| Diesel | $8.41 | $78.16 | $156.31 |
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