How far is Ontario, CA from Fontana, CA?
The driving distance from Ontario, CA to Fontana, CA is about 14.2 miles (22.8 km), with a travel time of about 00h 24m by car.
- The straight-line flight distance is about 12.5 miles (20.1 km).
- For a round trip, plan for roughly 00h 48m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 7:00 AM to 7:00 PM PDT.
Reverse, save, or send this route
This is an easy same-day return drive. Copy the route link, send it to another device, or print a clean version before you head out.
This is an easy same-day return drive.
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 00h 24m.
This is a short drive, so your comfort window is wide. Traffic and current weather matter more than the clock.
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.
Town in California, United States
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 Ontario and Fontana.
Turn-by-Turn Driving Directions
Step-by-step road directions between Ontario and Fontana.
-
1
Start on Holt Boulevard
2.7 mi · 5 min · Holt Boulevard
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2
Take the ramp straight toward I 10 East
1.1 km · 1 min
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3
Merge slight left onto San Bernardino Freeway
8.8 mi · 10 min · San Bernardino Freeway
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4
Take the exit slight right toward Sierra Avenue
1191 ft · 29 sec
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5
Keep slight left to continue on Sierra Avenue North
137 m · 13 sec
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6
Turn slight left onto Sierra Avenue
1.7 mi · 3 min · Sierra Avenue
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7
Turn right onto Merrill Avenue
63 m · 4 sec · Merrill Avenue
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8
Arrive at your destination
0 m · 1 sec · Merrill Avenue
Car Route Details
A richer read on the saved driving route between Ontario and Fontana.
Turn-heavy local drive
The route has frequent decision points for its length, so lane choice and turn timing will matter more than cruising speed.
San Bernardino Freeway
Merge slight left onto San Bernardino Freeway
8.82 mi · 00h 10m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A short regional drive
This route is short enough to handle as a quick errand, commute, or easy same-day return without much planning overhead.
Mostly Sunny leaving Ontario and Sunny near Fontana.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Ontario to Fontana?
The road trip is about 14.2 miles (22.8 km) and usually takes 00h 24m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route is short enough to handle as a quick errand, commute, or easy same-day return without much planning overhead.
What is the halfway point on this route?
Glen Avon is a useful midpoint, sitting about 7.1 miles from Ontario and 7.1 miles from Fontana.
How much longer is the road route than the straight-line distance?
The direct path is about 12.5 miles (20.1 km), while the road route adds roughly 1.7 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 7:00 AM to 7:00 PM PDT. If you want a more comfortable same-day return, try to leave by 7:42 PM PDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $2.88 one way or $5.77 round trip. Estimated CO2 is about 4.4 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Ontario and Sunny near Fontana.
Stop Ideas Near Glen Avon
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Ayres Hotel Chino Hills
City Hall
Chino City Hall
Jurupa Valley City Hall
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Glen Avon.
Riverside–Downtown
Ontario
San Bernardino Santa Fe Depot
Moreno Valley, California
Flight Path Map
This map shows the direct air route between Ontario and Fontana. Straight-line distance: 12.51 mi (20.14 km).
#1 Ontario
The second most populous city in San Bernardino County, California.
| Population | 183,393 |
| Coordinates | 34.0633400, -117.6508900 |
| Altitude | 306 |
| 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: Merrill Avenue (-117.43505, 34.09214)
Estimated Travel Time
Distance: 23 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 00h 28m |
| 40 mph (64.37 km/h) | 00h 21m |
| 50 mph (80.47 km/h) | 00h 17m |
| 60 mph (96.56 km/h) | 00h 14m |
| 70 mph (112.65 km/h) | 00h 12m |
| 80 mph (129 km/h) | 00h 10m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $5.77 | $2.88 | $5.77 |
| Mid-grade | $6.07 | $3.03 | $6.07 |
| Premium | $6.24 | $3.12 | $6.24 |
| Diesel | $7.57 | $3.78 | $7.57 |
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.