How far is Simi Valley, CA from Fremont, CA?
The driving distance from Simi Valley, CA to Fremont, CA is about 354.9 miles (571.1 km), with a travel time of about 05h 51m by car.
- The straight-line flight distance is about 289 miles (465.1 km).
- For a round trip, plan for roughly 11h 42m 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 05h 51m.
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 Kings County, California, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Sunny
Chance Light Rain
Driving Route Map
The map below follows the saved road route between Simi Valley and Fremont.
Turn-by-Turn Driving Directions
Step-by-step road directions between Simi Valley and Fremont.
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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
1.6 mi · 2 min · Ronald Reagan Freeway
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8
Take the exit slight right toward Balboa Boulevard
1726 ft · 49 sec
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9
Turn left onto Balboa Boulevard
3.2 mi · 6 min · Balboa Boulevard
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10
Turn left onto Foothill Boulevard
1.1 mi · 2 min · Foothill Boulevard
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11
Take the ramp straight toward I 5 North, CA 14 North: Sacramento, Palmdale
48 m · 4 sec
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12
Keep slight left to continue on I 5 North: Sacramento
1172 ft · 29 sec
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13
Merge slight left
35.7 mi · 41 min
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14
Keep slight left to continue on Golden State Freeway
22.3 mi · 25 min · Golden State Freeway
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15
Keep slight right to continue on Westside Freeway
182.5 mi · 3 hr 16 min · Westside Freeway
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16
Take the exit slight right toward CA 152 West: Gilroy, Hollister, San Jose
1038 ft · 27 sec
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17
Continue straight
28.7 mi · 33 min
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18
Keep slight right
11.9 mi · 17 min
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19
Take the exit slight right toward US 101 North: San Jose
2466 ft · 1 min
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20
Merge slight left onto South Valley Freeway
19.9 mi · 23 min · South Valley Freeway
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21
Keep slight left
12.2 mi · 14 min
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22
Take the exit slight right toward I 880 North: Oakland
1188 ft · 29 sec
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23
Merge slight left onto Nimitz Freeway
7.3 mi · 8 min · Nimitz Freeway
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24
Keep slight right to continue on Nimitz Freeway
5.7 mi · 7 min · Nimitz Freeway
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25
Take the exit slight right toward Mowry Avenue, Central Fremont
1419 ft · 36 sec
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26
Turn right onto Mowry Avenue
1.4 mi · 3 min · Mowry Avenue
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27
Arrive at your destination
0 m · 1 sec · Mowry Avenue
Car Route Details
A richer read on the saved driving route between Simi Valley and Fremont.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
Westside Freeway
Keep slight right to continue on Westside Freeway
183 mi · 03h 16m
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 Simi Valley and Chance Light Rain near Fremont.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Simi Valley to Fremont?
The road trip is about 354.9 miles (571.1 km) and usually takes 05h 51m 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?
Avenal is a useful midpoint, sitting about 175.5 miles from Simi Valley and 179.3 miles from Fremont.
How much longer is the road route than the straight-line distance?
The direct path is about 289 miles (465.1 km), while the road route adds roughly 65.9 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 5:18 AM PDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $72.23 one way or $144.46 round trip. Estimated CO2 is about 111.3 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Simi Valley and Chance Light Rain near Fremont.
Stop Ideas Near Avenal
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 Avenal.
Kettleman City, California
Lemoore, California
Lemoore (Naval Air Station), California
Corcoran station
Flight Path Map
This map shows the direct air route between Simi Valley and Fremont. Straight-line distance: 288.98 mi (465.07 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 Fremont
The fifth most populous city in California.
| Population | 234,569 |
| Coordinates | 37.5482700, -121.9885700 |
| Altitude | 17 |
| Country | United States |
End: Mowry Avenue (-121.988548, 37.548259)
Estimated Travel Time
Distance: 571 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 11h 49m |
| 40 mph (64.37 km/h) | 08h 52m |
| 50 mph (80.47 km/h) | 07h 05m |
| 60 mph (96.56 km/h) | 05h 54m |
| 70 mph (112.65 km/h) | 05h 04m |
| 80 mph (129 km/h) | 04h 25m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $5.77 | $72.23 | $144.46 |
| Mid-grade | $6.07 | $75.95 | $151.89 |
| Premium | $6.24 | $78.16 | $156.32 |
| Diesel | $7.57 | $94.74 | $189.48 |
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 23, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.