How far is Simi Valley, CA from San Diego, CA?
The driving distance from Simi Valley, CA to San Diego, CA is about 166.5 miles (268 km), with a travel time of about 02h 36m by car.
- The straight-line flight distance is about 142.1 miles (228.7 km).
- For a round trip, plan for roughly 05h 12m 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 02h 36m.
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.
A city located in Orange County, California.
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Clear
Driving Route Map
The map below follows the saved road route between Simi Valley and San Diego.
Turn-by-Turn Driving Directions
Step-by-step road directions between Simi Valley and San Diego.
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1
Start on 3rd Street
808 ft · 38 sec · 3rd Street
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2
Turn right onto East Los Angeles Avenue
695 ft · 14 sec · East Los Angeles Avenue
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3
Turn left onto First Street
1.1 km · 1 min · First Street
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4
Take the ramp right toward CA 118 East
1257 ft · 33 sec
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5
Merge slight left onto Ronald Reagan Freeway
12 mi · 14 min · Ronald Reagan Freeway
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6
Keep slight right to continue on Ronald Reagan Freeway
2.5 mi · 3 min · Ronald Reagan Freeway
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7
Keep slight right to continue on Ronald Reagan Freeway
1.9 mi · 2 min · Ronald Reagan Freeway
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8
Keep slight right to continue on Ronald Reagan Freeway
2.4 mi · 3 min · Ronald Reagan Freeway
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9
Keep slight right to continue on Ronald Reagan Freeway
1.5 km · 1 min · Ronald Reagan Freeway
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10
Take the exit slight right toward I 5 South: Los Angeles
1.3 km · 2 min
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11
Merge slight left onto Golden State Freeway
21.8 mi · 26 min · Golden State Freeway
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12
Keep slight left to continue on Golden State Freeway
1.3 mi · 2 min · Golden State Freeway
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13
Merge slight left onto Santa Ana Freeway
25.7 mi · 30 min · Santa Ana Freeway
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14
Keep slight right to continue on Santa Ana Freeway
1241 ft · 16 sec · Santa Ana Freeway
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15
Take the exit slight right toward Broadway, Main Street, Santa Ana
1.3 km · 57 sec
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16
Keep slight left
788 ft · 10 sec
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17
Keep slight left to continue on I 5 South
981 ft · 13 sec
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18
Merge slight left onto Santa Ana Freeway
1.3 km · 54 sec · Santa Ana Freeway
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19
Keep slight right to continue on Santa Ana Freeway
1.2 km · 52 sec · Santa Ana Freeway
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20
Keep slight right to continue on Santa Ana Freeway
1.2 mi · 1 min · Santa Ana Freeway
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21
Take the exit slight right toward Newport Avenue
1.2 km · 1 min
-
22
Turn right onto Newport Avenue
1943 ft · 44 sec · Newport Avenue
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23
Turn left onto Walnut Avenue
2.2 mi · 4 min · Walnut Avenue
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24
Turn left onto Jamboree Road
2595 ft · 38 sec · Jamboree Road
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25
Take the exit slight right toward I 5 South
1479 ft · 21 sec
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26
Merge slight left onto Santa Ana Freeway
5.5 mi · 6 min · Santa Ana Freeway
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27
Keep slight left to continue on Santa Ana Freeway
1.3 km · 56 sec · Santa Ana Freeway
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28
Merge slight right onto San Diego Freeway
76.5 mi · 1 hr 29 min · San Diego Freeway
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29
Take the exit slight right toward Front Street, Civic Center, 2nd Avenue
1164 ft · 28 sec
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30
Keep slight right to continue on Front Street, Civic Center
592 ft · 15 sec
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31
Continue on Front Street
2662 ft · 2 min · Front Street
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32
Arrive at your destination
0 m · 1 sec · Front Street
Car Route Details
A richer read on the saved driving route between Simi Valley 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 right onto San Diego Freeway
76.5 mi · 01h 29m
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.
Mostly Clear leaving Simi Valley 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 Simi Valley to San Diego?
The road trip is about 166.5 miles (268 km) and usually takes 02h 36m 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?
Irvine is a useful midpoint, sitting about 81.2 miles from Simi Valley and 85.3 miles from San Diego.
How much longer is the road route than the straight-line distance?
The direct path is about 142.1 miles (228.7 km), while the road route adds roughly 24.4 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 8:00 AM to 10:00 AM PDT. If you want a more comfortable same-day return, try to leave by 1:18 PM PDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $33.92 one way or $67.84 round trip. Estimated CO2 is about 52.3 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Clear around Simi Valley and Sunny near San Diego.
Stop Ideas Near Irvine
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Miraval Life in Balance Spa at Monarch Beach Resort
Newport Beach Municipal Operations
City of Lake Forest
City of Tustin Parks & Recreation
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Irvine.
Irvine Transportation Center
Santa Ana Regional Transportation Center
Anaheim Regional Transportation Intermodal Center
Fullerton Transportation Center
Flight Path Map
This map shows the direct air route between Simi Valley and San Diego. Straight-line distance: 142.13 mi (228.74 km).
#1 Simi Valley
The third most populous city in Ventura County, California.
| Population | 125,168 |
| Coordinates | 34.2694500, -118.7814800 |
| Altitude | 234 |
| 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: 268 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 05h 32m |
| 40 mph (64.37 km/h) | 04h 09m |
| 50 mph (80.47 km/h) | 03h 19m |
| 60 mph (96.56 km/h) | 02h 46m |
| 70 mph (112.65 km/h) | 02h 22m |
| 80 mph (129 km/h) | 02h 04m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $5.77 | $33.92 | $67.84 |
| Mid-grade | $6.07 | $35.67 | $71.34 |
| Premium | $6.24 | $36.71 | $73.42 |
| Diesel | $7.57 | $44.49 | $88.99 |
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 · May 20, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.