How far is Ontario, CA from Fremont, CA?
The driving distance from Ontario, CA to Fremont, CA is about 390.5 miles (628.5 km), with a travel time of about 06h 32m by car.
- The straight-line flight distance is about 342.1 miles (550.5 km).
- For a round trip, plan for roughly 13h 04m 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 06h 32m.
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 Kings 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 Ontario and Fremont.
Turn-by-Turn Driving Directions
Step-by-step road directions between Ontario and Fremont.
-
1
Start on Holt Boulevard
7 m · 6 sec · Holt Boulevard
-
2
Turn left onto North Euclid Avenue
1.7 mi · 3 min · North Euclid Avenue
-
3
Take the ramp slight right toward I 10 West: Los Angeles
1360 ft · 35 sec
-
4
Merge slight left onto San Bernardino Freeway
1.2 mi · 1 min · San Bernardino Freeway
-
5
Take the exit slight left
86 m · 7 sec
-
6
Merge slight left onto I-10 Metro ExpressLanes
1.4 mi · 2 min · I-10 Metro ExpressLanes
-
7
Merge slight right onto San Bernardino Freeway
1.2 mi · 1 min · San Bernardino Freeway
-
8
Keep slight right to continue on San Bernardino Freeway
1.4 km · 1 min · San Bernardino Freeway
-
9
Keep slight right to continue on San Bernardino Freeway
1.3 mi · 2 min · San Bernardino Freeway
-
10
Keep slight right to continue on San Bernardino Freeway
1.9 mi · 2 min · San Bernardino Freeway
-
11
Keep slight right to continue on San Bernardino Freeway
1.3 km · 55 sec · San Bernardino Freeway
-
12
Take the exit slight right toward CA 57: Santa Ana
1086 ft · 27 sec
-
13
Keep slight right to continue on CA 57 North
2267 ft · 55 sec
-
14
Continue straight
3.4 mi · 4 min
-
15
Keep slight left to continue on I 210 West: Pasadena
1.1 mi · 2 min
-
16
Merge slight left onto Foothill Freeway
18.3 mi · 21 min · Foothill Freeway
-
17
Keep slight right to continue on Foothill Freeway
25.6 mi · 30 min · Foothill Freeway
-
18
Keep slight right
686 ft · 9 sec
-
19
Merge slight right
1.6 km · 1 min
-
20
Keep slight left
36.1 mi · 42 min
-
21
Keep slight left to continue on Golden State Freeway
22.3 mi · 25 min · Golden State Freeway
-
22
Keep slight right to continue on Westside Freeway
182.5 mi · 3 hr 16 min · Westside Freeway
-
23
Take the exit slight right toward CA 152 West: Gilroy, Hollister, San Jose
1038 ft · 27 sec
-
24
Continue straight
28.7 mi · 33 min
-
25
Keep slight right
11.9 mi · 17 min
-
26
Take the exit slight right toward US 101 North: San Jose
2466 ft · 1 min
-
27
Merge slight left onto South Valley Freeway
19.9 mi · 23 min · South Valley Freeway
-
28
Keep slight left
12.2 mi · 14 min
-
29
Take the exit slight right toward I 880 North: Oakland
1188 ft · 29 sec
-
30
Merge slight left onto Nimitz Freeway
7.3 mi · 8 min · Nimitz Freeway
-
31
Keep slight right to continue on Nimitz Freeway
5.7 mi · 7 min · Nimitz Freeway
-
32
Take the exit slight right toward Mowry Avenue, Central Fremont
1419 ft · 36 sec
-
33
Turn right onto Mowry Avenue
1.4 mi · 3 min · Mowry Avenue
-
34
Arrive at your destination
0 m · 1 sec · Mowry Avenue
Car Route Details
A richer read on the saved driving route between Ontario and Fremont.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
Westside Freeway
Keep slight right to continue on Westside Freeway
183 mi · 03h 16m
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 Ontario and Sunny near Fremont.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Ontario to Fremont?
The road trip is about 390.5 miles (628.5 km) and usually takes 06h 32m 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?
Kettleman City is a useful midpoint, sitting about 195 miles from Ontario and 195.5 miles from Fremont.
How much longer is the road route than the straight-line distance?
The direct path is about 342.1 miles (550.5 km), while the road route adds roughly 48.4 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 $79.50 one way or $158.99 round trip. Estimated CO2 is about 122.5 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Ontario and Sunny near Fremont.
Stop Ideas Near Kettleman City
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 Kettleman City.
Kettleman City, California
Lemoore, California
Corcoran station
Lemoore (Naval Air Station), California
Flight Path Map
This map shows the direct air route between Ontario and Fremont. Straight-line distance: 342.05 mi (550.48 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 Fremont
The fifth most populous city in California.
| Population | 234,569 |
| Coordinates | 37.5482700, -121.9885700 |
| Altitude | 17 |
| Country | United States |
End: Mowry Avenue (-121.988548, 37.548259)
Estimated Travel Time
Distance: 629 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 13h 00m |
| 40 mph (64.37 km/h) | 09h 45m |
| 50 mph (80.47 km/h) | 07h 48m |
| 60 mph (96.56 km/h) | 06h 30m |
| 70 mph (112.65 km/h) | 05h 34m |
| 80 mph (129 km/h) | 04h 52m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $5.77 | $79.50 | $158.99 |
| Mid-grade | $6.07 | $83.59 | $167.18 |
| Premium | $6.24 | $86.03 | $172.06 |
| Diesel | $7.57 | $104.27 | $208.55 |
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.