How far is Sonoma, CA from Fontana, CA?
The driving distance from Sonoma, CA to Fontana, CA is about 451.7 miles (727 km), with a travel time of about 08h 31m by car.
- The straight-line flight distance is about 403.1 miles (648.8 km).
- For a round trip, plan for roughly 17h 02m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 7:30 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 08h 31m.
Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
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.
Areas Of Fog then Partly Sunny
Chance Rain Showers
Driving Route Map
The map below follows the saved road route between Sonoma and Fontana.
Turn-by-Turn Driving Directions
Step-by-step road directions between Sonoma and Fontana.
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1
Start on West Napa Street
14 m · 5 sec · West Napa Street
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2
Turn right onto Broadway
1.1 mi · 2 min · Broadway
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3
Turn left onto Napa Road
4.3 mi · 7 min · Napa Road
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4
At the end of the road, turn left onto Fremont Drive
1.3 km · 1 min · Fremont Drive
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5
Continue on Carneros Highway
4.4 mi · 6 min · Carneros Highway
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6
Turn right onto Saint Helena Highway
2.7 mi · 3 min · Saint Helena Highway
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7
Continue on Napa–Vallejo Highway
1.3 mi · 1 min · Napa–Vallejo Highway
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8
Continue on Broadway Street
4 mi · 5 min · Broadway Street
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9
Continue on Sonoma Boulevard
1.8 mi · 2 min · Sonoma Boulevard
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10
Continue on Sonoma Boulevard
1.1 mi · 2 min · Sonoma Boulevard
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11
Turn left onto Redwood Street
1786 ft · 45 sec · Redwood Street
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12
Turn right onto Broadway Street
1.1 mi · 2 min · Broadway Street
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13
Turn slight left onto Alameda Street
1.1 km · 2 min · Alameda Street
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14
Turn left onto Curtola Parkway
7.1 mi · 9 min · Curtola Parkway
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15
Keep slight left to continue on I 680 South: Martinez, San Jose
1.1 km · 47 sec
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16
Continue on Benicia-Martinez Bridge
8 mi · 9 min · Benicia-Martinez Bridge
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17
Keep slight right to continue on Senator Daniel E Boatwright Highway
4.8 mi · 6 min · Senator Daniel E Boatwright Highway
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18
Continue on Donald D Doyle Highway
1.4 mi · 2 min · Donald D Doyle Highway
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19
Keep slight right to continue on Donald D Doyle Highway
13.4 mi · 16 min · Donald D Doyle Highway
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20
Take the exit slight right toward I 580 East: Livermore, Stockton
1362 ft · 33 sec
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21
Keep slight left to continue on I 580 East: Livermore, Stockton
1.1 km · 1 min
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22
Keep slight left to continue on I 580: Stockton
1581 ft · 39 sec
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23
Merge slight left onto Arthur H. Breed Junior Freeway
1.4 mi · 2 min · Arthur H. Breed Junior Freeway
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24
Keep slight right to continue on Arthur H. Breed Junior Freeway
17.8 mi · 21 min · Arthur H. Breed Junior Freeway
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25
Keep slight right to continue on William Elton Brown Freeway
11.1 mi · 12 min · William Elton Brown Freeway
-
26
Keep slight left to continue on William Elton Brown Freeway
5.9 mi · 6 min · William Elton Brown Freeway
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27
Merge slight left onto Westside Freeway
224.4 mi · 4 hr · Westside Freeway
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28
Keep slight right
58.4 mi · 1 hr 7 min
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29
Keep slight left to continue on Golden State Freeway
2 mi · 2 min · Golden State Freeway
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30
Take the exit slight right toward I 210 East: Pasadena
1347 ft · 18 sec
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31
Continue on Foothill Freeway
24.4 mi · 28 min · Foothill Freeway
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32
Keep slight right to continue on Foothill Freeway
19.1 mi · 22 min · Foothill Freeway
-
33
Keep slight right to continue on Foothill Freeway
2.9 mi · 3 min · Foothill Freeway
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34
Keep slight right to continue on Foothill Freeway
1.4 mi · 2 min · Foothill Freeway
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35
Keep slight right to continue on Foothill Freeway
1.2 mi · 1 min · Foothill Freeway
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36
Keep slight right to continue on Foothill Freeway
1.8 mi · 2 min · Foothill Freeway
-
37
Keep slight right to continue on Foothill Freeway
16.1 mi · 19 min · Foothill Freeway
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38
Take the exit slight right toward Sierra Avenue
1796 ft · 46 sec
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39
Turn right onto Sierra Avenue
3 mi · 5 min · Sierra Avenue
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40
Turn left onto Merrill Avenue
63 m · 4 sec · Merrill Avenue
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41
Arrive at your destination
0 m · 1 sec · Merrill Avenue
Car Route Details
A richer read on the saved driving route between Sonoma and Fontana.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
Westside Freeway
Merge slight left onto Westside Freeway
224 mi · 04h 00m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
Better with a longer stop
This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.
Areas Of Fog then Partly Sunny leaving Sonoma and Chance Rain Showers near Fontana.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Sonoma to Fontana?
The road trip is about 451.7 miles (727 km) and usually takes 08h 31m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.
What is the halfway point on this route?
Avenal is a useful midpoint, sitting about 225.9 miles from Sonoma and 225.9 miles from Fontana.
How much longer is the road route than the straight-line distance?
The direct path is about 403.1 miles (648.8 km), while the road route adds roughly 48.6 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 7:30 AM PDT. Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $91.96 one way or $183.92 round trip. Estimated CO2 is about 141.7 kg one way.
What should you check before leaving?
Before you leave, expect Areas Of Fog then Partly Sunny around Sonoma and Chance Rain Showers near Fontana.
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 Sonoma and Fontana. Straight-line distance: 403.16 mi (648.82 km).
#1 Sonoma
Town in Sonoma County, California, United States
| Population | 10,973 |
| Coordinates | 38.2918600, -122.4580400 |
| Altitude | 26 |
| 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: 727 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 15h 03m |
| 40 mph (64.37 km/h) | 11h 17m |
| 50 mph (80.47 km/h) | 09h 02m |
| 60 mph (96.56 km/h) | 07h 31m |
| 70 mph (112.65 km/h) | 06h 27m |
| 80 mph (129 km/h) | 05h 38m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $5.77 | $91.96 | $183.92 |
| Mid-grade | $6.07 | $96.69 | $193.38 |
| Premium | $6.24 | $99.51 | $199.03 |
| Diesel | $7.57 | $120.62 | $241.24 |
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 26, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.