How far is Altadena, CA from Fontana, CA?
The driving distance from Altadena, CA to Fontana, CA is about 46.7 miles (75.2 km), with a travel time of about 00h 59m by car.
- The straight-line flight distance is about 40.4 miles (65 km).
- For a round trip, plan for roughly 01h 58m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 8:00 AM to 10:00 AM PDT.
Reverse, save, or send this route
This route works well as a day trip with time at the destination. Copy the route link, send it to another device, or print a clean version before you head out.
This route works well as a day trip with time at the destination.
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 59m.
A morning start gives you useful time at the destination and keeps the return out of the late evening.
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 California, USA
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 Altadena and Fontana.
Turn-by-Turn Driving Directions
Step-by-step road directions between Altadena and Fontana.
-
1
Start on North Lake Avenue
2.7 mi · 6 min · North Lake Avenue
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2
Take the ramp left toward I 210 East
1425 ft · 36 sec
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3
Merge slight left onto Foothill Freeway
17 mi · 20 min · Foothill Freeway
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4
Keep slight right to continue on Foothill Freeway
2.9 mi · 3 min · Foothill Freeway
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5
Keep slight right to continue on Foothill Freeway
1.4 mi · 2 min · Foothill Freeway
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6
Keep slight right to continue on Foothill Freeway
1.2 mi · 1 min · Foothill Freeway
-
7
Keep slight right to continue on Foothill Freeway
1.8 mi · 2 min · Foothill Freeway
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8
Keep slight right to continue on Foothill Freeway
16.1 mi · 19 min · Foothill Freeway
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9
Take the exit slight right toward Sierra Avenue
1796 ft · 46 sec
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10
Turn right onto Sierra Avenue
3 mi · 5 min · Sierra Avenue
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11
Turn left onto Merrill Avenue
63 m · 4 sec · Merrill Avenue
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12
Arrive at your destination
0 m · 1 sec · Merrill Avenue
Car Route Details
A richer read on the saved driving route between Altadena 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.
Foothill Freeway
Merge slight left onto Foothill Freeway
17 mi · 00h 20m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A comfortable day-trip route
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
Sunny leaving Altadena and Mostly Sunny near Fontana.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Altadena to Fontana?
The road trip is about 46.7 miles (75.2 km) and usually takes 00h 59m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
What is the halfway point on this route?
San Dimas is a useful midpoint, sitting about 23.4 miles from Altadena and 23.4 miles from Fontana.
How much longer is the road route than the straight-line distance?
The direct path is about 40.4 miles (65 km), while the road route adds roughly 6.3 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 8:00 AM to 10:00 AM PDT. If you want a more comfortable same-day return, try to leave by 4:32 PM PDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $9.52 one way or $19.04 round trip. Estimated CO2 is about 14.7 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Altadena and Mostly Sunny near Fontana.
Stop Ideas Near San Dimas
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Your Home Away From Home
Ayres Hotel Chino Hills
Chino City Hall
Cucamonga Sign Shop LLC
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to San Dimas.
Pomona station
Claremont, California
Ontario
Fullerton Transportation Center
Flight Path Map
This map shows the direct air route between Altadena and Fontana. Straight-line distance: 40.38 mi (64.98 km).
#1 Altadena
Census-designated place in Los Angeles County, California, United States
| Population | 42,777 |
| Coordinates | 34.1897300, -118.1311800 |
| Altitude | 414 |
| 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: 75 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 33m |
| 40 mph (64.37 km/h) | 01h 10m |
| 50 mph (80.47 km/h) | 00h 56m |
| 60 mph (96.56 km/h) | 00h 46m |
| 70 mph (112.65 km/h) | 00h 40m |
| 80 mph (129 km/h) | 00h 34m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $5.77 | $9.52 | $19.04 |
| Mid-grade | $6.07 | $10.01 | $20.02 |
| Premium | $6.24 | $10.30 | $20.60 |
| Diesel | $7.57 | $12.49 | $24.97 |
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 13, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.