How far is Union City, CA from Fontana, CA?
The driving distance from Union City, CA to Fontana, CA is about 408 miles (656.6 km), with a travel time of about 07h 38m by car.
- The straight-line flight distance is about 355.4 miles (571.9 km).
- For a round trip, plan for roughly 15h 17m 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 07h 38m.
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.
Census-designated place in Kern County, California
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Sunny
Driving Route Map
The map below follows the saved road route between Union City and Fontana.
Turn-by-Turn Driving Directions
Step-by-step road directions between Union City and Fontana.
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1
Start on Cambridge Way
59 m · 11 sec · Cambridge Way
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2
Turn left onto Union City Boulevard
1.5 km · 2 min · Union City Boulevard
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3
Continue on Hesperian Boulevard
2 mi · 4 min · Hesperian Boulevard
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4
Take the ramp slight right toward CA 92 East, I 880: Hayward
2521 ft · 35 sec
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5
Keep slight left to continue on I 880 North, CA 92 East: Oakland, Downtown Hayward
1127 ft · 15 sec
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6
Keep slight right to continue on CA 92 East: Downtown Hayward
1093 ft · 23 sec
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7
Merge slight left onto Jackson Street
1005 ft · 23 sec · Jackson Street
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8
Continue on West Jackson Street
1.5 mi · 3 min · West Jackson Street
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9
Continue on Foothill Boulevard
2503 ft · 1 min · Foothill Boulevard
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10
Turn right onto A Street
1.2 km · 1 min · A Street
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11
Continue on Redwood Road
2669 ft · 59 sec · Redwood Road
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12
Take the ramp right toward I 580 East: Stockton
1451 ft · 37 sec
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13
Merge slight left onto Arthur H. Breed Junior Freeway
10.4 mi · 12 min · Arthur H. Breed Junior Freeway
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14
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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15
Keep slight right to continue on William Elton Brown Freeway
11.1 mi · 12 min · William Elton Brown Freeway
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16
Keep slight left to continue on William Elton Brown Freeway
5.9 mi · 6 min · William Elton Brown Freeway
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17
Merge slight left onto Westside Freeway
224.4 mi · 4 hr · Westside Freeway
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18
Keep slight right
58.4 mi · 1 hr 7 min
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19
Keep slight left to continue on Golden State Freeway
2 mi · 2 min · Golden State Freeway
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20
Take the exit slight right toward I 210 East: Pasadena
1347 ft · 18 sec
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21
Continue on Foothill Freeway
24.4 mi · 28 min · Foothill Freeway
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22
Keep slight right to continue on Foothill Freeway
19.1 mi · 22 min · Foothill Freeway
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23
Keep slight right to continue on Foothill Freeway
2.9 mi · 3 min · Foothill Freeway
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24
Keep slight right to continue on Foothill Freeway
1.4 mi · 2 min · Foothill Freeway
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25
Keep slight right to continue on Foothill Freeway
1.2 mi · 1 min · Foothill Freeway
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26
Keep slight right to continue on Foothill Freeway
1.8 mi · 2 min · Foothill Freeway
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27
Keep slight right to continue on Foothill Freeway
16.1 mi · 19 min · Foothill Freeway
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28
Take the exit slight right toward Sierra Avenue
1796 ft · 46 sec
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29
Turn right onto Sierra Avenue
3 mi · 5 min · Sierra Avenue
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30
Turn left onto Merrill Avenue
63 m · 4 sec · Merrill Avenue
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31
Arrive at your destination
0 m · 1 sec · Merrill Avenue
Car Route Details
A richer read on the saved driving route between Union City 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.
Mostly Sunny leaving Union City and Sunny near Fontana.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Union City to Fontana?
The road trip is about 408 miles (656.6 km) and usually takes 07h 38m 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?
Lost Hills is a useful midpoint, sitting about 204 miles from Union City and 204 miles from Fontana.
How much longer is the road route than the straight-line distance?
The direct path is about 355.4 miles (571.9 km), while the road route adds roughly 52.6 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 $83.07 one way or $166.15 round trip. Estimated CO2 is about 128 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Union City and Sunny near Fontana.
Stop Ideas Near Lost Hills
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 Lost Hills.
Wasco station
Kettleman City, California
Corcoran station
Bakersfield
Flight Path Map
This map shows the direct air route between Union City and Fontana. Straight-line distance: 355.36 mi (571.89 km).
#1 Union City
A city in Placer County, California.
| Population | 74,107 |
| Coordinates | 37.5963232, -122.0816297 |
| Altitude | 3 |
| 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: 657 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 13h 35m |
| 40 mph (64.37 km/h) | 10h 12m |
| 50 mph (80.47 km/h) | 08h 09m |
| 60 mph (96.56 km/h) | 06h 48m |
| 70 mph (112.65 km/h) | 05h 49m |
| 80 mph (129 km/h) | 05h 05m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $5.77 | $83.07 | $166.15 |
| Mid-grade | $6.07 | $87.35 | $174.70 |
| Premium | $6.24 | $89.90 | $179.80 |
| Diesel | $7.57 | $108.96 | $217.93 |
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 15, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.