How far is San Luis Obispo, CA from Fontana, CA?
The driving distance from San Luis Obispo, CA to Fontana, CA is about 237 miles (381.4 km), with a travel time of about 04h 45m by car.
- The straight-line flight distance is about 200.8 miles (323.2 km).
- For a round trip, plan for roughly 09h 30m 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 45m.
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 most populous city in Ventura County, California.
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Driving Route Map
The map below follows the saved road route between San Luis Obispo and Fontana.
Turn-by-Turn Driving Directions
Step-by-step road directions between San Luis Obispo and Fontana.
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1
Start on Monterey Street
36 m · 8 sec · Monterey Street
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2
Turn right onto Santa Rosa Street
2194 ft · 1 min · Santa Rosa Street
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3
Turn right onto Olive Street
113 m · 13 sec · Olive Street
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4
Take the ramp right
133 m · 11 sec
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5
Merge slight left onto El Camino Real
91 m · 4 sec · El Camino Real
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6
Continue on Cabrillo Highway
11.8 mi · 14 min · Cabrillo Highway
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7
Continue on El Camino Real
44.8 mi · 52 min · El Camino Real
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8
Take the exit slight right toward CA 154: Los Olivos, Lake Cachuma
1266 ft · 37 sec
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9
Turn left onto Chumash Highway
6.4 mi · 10 min · Chumash Highway
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10
Enter the roundabout and take exit 2 toward Chumash Highway
39 m · 2 sec · Chumash Highway
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11
Exit the roundabout onto Chumash Highway
2.2 mi · 3 min · Chumash Highway
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12
Enter the roundabout and take exit 2 toward Chumash Highway
35 m · 2 sec · Chumash Highway
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13
Exit the roundabout onto Chumash Highway
23.9 mi · 33 min · Chumash Highway
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14
Take the ramp slight left toward US 101 South
1206 ft · 32 sec
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15
Merge slight left onto El Camino Real
17 mi · 20 min · El Camino Real
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16
Continue on Ventura Freeway
70.5 mi · 1 hr 21 min · Ventura Freeway
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17
Keep slight left to continue on Ventura Freeway
1.5 km · 1 min · Ventura Freeway
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18
Keep slight right to continue on Ventura Freeway
1.4 mi · 2 min · Ventura Freeway
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19
Keep slight right to continue on Ventura Freeway
1.6 km · 1 min · Ventura Freeway
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20
Keep slight right to continue on Ventura Freeway
1.6 km · 1 min · Ventura Freeway
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21
Keep slight right to continue on Ventura Freeway
2.2 mi · 3 min · Ventura Freeway
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22
Keep slight right to continue on Ventura Freeway
1.2 km · 51 sec · Ventura Freeway
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23
Keep slight right to continue on Ventura Freeway
7.2 mi · 8 min · Ventura Freeway
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24
Merge slight right onto Foothill Freeway
17.9 mi · 21 min · Foothill Freeway
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25
Keep slight right to continue on Foothill Freeway
2.9 mi · 3 min · Foothill Freeway
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26
Keep slight right to continue on Foothill Freeway
1.4 mi · 2 min · Foothill Freeway
-
27
Keep slight right to continue on Foothill Freeway
1.2 mi · 1 min · Foothill Freeway
-
28
Keep slight right to continue on Foothill Freeway
1.8 mi · 2 min · Foothill Freeway
-
29
Keep slight right to continue on Foothill Freeway
16.1 mi · 19 min · Foothill Freeway
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30
Take the exit slight right toward Sierra Avenue
1796 ft · 46 sec
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31
Turn right onto Sierra Avenue
3 mi · 5 min · Sierra Avenue
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32
Turn left onto Merrill Avenue
63 m · 4 sec · Merrill Avenue
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33
Arrive at your destination
0 m · 1 sec · Merrill Avenue
Car Route Details
A richer read on the saved driving route between San Luis Obispo and Fontana.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
Ventura Freeway
Continue on Ventura Freeway
70.5 mi · 01h 21m
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.
Mostly Sunny leaving San Luis Obispo and Sunny near Fontana.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from San Luis Obispo to Fontana?
The road trip is about 237 miles (381.4 km) and usually takes 04h 45m 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?
Ventura is a useful midpoint, sitting about 118.4 miles from San Luis Obispo and 118.6 miles from Fontana.
How much longer is the road route than the straight-line distance?
The direct path is about 200.8 miles (323.2 km), while the road route adds roughly 36.2 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 7:30 AM PDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $48.23 one way or $96.46 round trip. Estimated CO2 is about 74.3 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around San Luis Obispo and Sunny near Fontana.
Stop Ideas Near Ventura
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Best Western Plus Carpinteria Inn
Ventura City Hall (formerly the Ventura County Courthouse - California Historical Landmark #847)
San Buenaventura City Hall
Oxnard Public Works Department
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Ventura.
Ventura
Oxnard Transportation Center
Santa Paula, California
Carpinteria station
Flight Path Map
This map shows the direct air route between San Luis Obispo and Fontana. Straight-line distance: 200.8 mi (323.16 km).
#1 San Luis Obispo
A city in San Luis Obispo County, California.
| Population | 47,590 |
| Coordinates | 35.2827500, -120.6596200 |
| Altitude | 71 |
| Country | United States |
#2 Fontana
The second most populous city in San Bernardino County, California.
| Population | 216,173 |
| Coordinates | 34.0922300, -117.4350500 |
| Altitude | 377 |
| Country | United States |
End: Fontana (-117.43505, 34.09223)
Estimated Travel Time
Distance: 381 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 07h 53m |
| 40 mph (64.37 km/h) | 05h 55m |
| 50 mph (80.47 km/h) | 04h 44m |
| 60 mph (96.56 km/h) | 03h 56m |
| 70 mph (112.65 km/h) | 03h 23m |
| 80 mph (129 km/h) | 02h 57m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $5.77 | $48.23 | $96.46 |
| Mid-grade | $6.07 | $50.71 | $101.42 |
| Premium | $6.24 | $52.19 | $104.38 |
| Diesel | $7.57 | $63.26 | $126.52 |
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 19, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.