How far is Costa Mesa, CA from Fremont, CA?
The driving distance from Costa Mesa, CA to Fremont, CA is about 399.9 miles (643.5 km), with a travel time of about 06h 48m by car.
- The straight-line flight distance is about 353.7 miles (569.2 km).
- For a round trip, plan for roughly 13h 37m 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 48m.
Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
This departure sits inside the recommended comfort window for the route.
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.
Slight Chance Rain Showers
Mostly Cloudy then Slight Chance Light Rain
Driving Route Map
The map below follows the saved road route between Costa Mesa and Fremont.
Turn-by-Turn Driving Directions
Step-by-step road directions between Costa Mesa and Fremont.
-
1
Start on Newport Boulevard
1503 ft · 34 sec · Newport Boulevard
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2
Continue on Costa Mesa Freeway
7.6 mi · 9 min · Costa Mesa Freeway
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3
Keep slight right to continue on Costa Mesa Freeway
2136 ft · 28 sec · Costa Mesa Freeway
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4
Take the exit slight right toward I 5 North: Santa Ana
1.1 km · 47 sec
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5
Merge slight left onto Santa Ana Freeway
2756 ft · 36 sec · Santa Ana Freeway
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6
Keep slight right to continue on Santa Ana Freeway
1.7 mi · 2 min · Santa Ana Freeway
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7
Keep slight right to continue on Santa Ana Freeway
9.4 mi · 11 min · Santa Ana Freeway
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8
Keep slight right to continue on Santa Ana Freeway
18 mi · 21 min · Santa Ana Freeway
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9
Keep slight right to continue on Golden State Freeway
25.5 mi · 30 min · Golden State Freeway
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10
Keep slight left to continue on Golden State Freeway
2.2 mi · 3 min · Golden State Freeway
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11
Keep slight right to continue on I 5 Truck North, CA 14 Truck
1.5 mi · 2 min
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12
Keep slight left
36.1 mi · 42 min
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13
Keep slight left to continue on Golden State Freeway
22.3 mi · 25 min · Golden State Freeway
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14
Keep slight right to continue on Westside Freeway
182.5 mi · 3 hr 16 min · Westside Freeway
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15
Take the exit slight right toward CA 152 West: Gilroy, Hollister, San Jose
1038 ft · 27 sec
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16
Continue straight
28.7 mi · 33 min
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17
Keep slight right
11.9 mi · 17 min
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18
Take the exit slight right toward US 101 North: San Jose
2466 ft · 1 min
-
19
Merge slight left onto South Valley Freeway
19.9 mi · 23 min · South Valley Freeway
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20
Keep slight left
12.2 mi · 14 min
-
21
Take the exit slight right toward I 880 North: Oakland
1188 ft · 29 sec
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22
Merge slight left onto Nimitz Freeway
7.3 mi · 8 min · Nimitz Freeway
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23
Keep slight right to continue on Nimitz Freeway
5.7 mi · 7 min · Nimitz Freeway
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24
Take the exit slight right toward Mowry Avenue, Central Fremont
1419 ft · 36 sec
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25
Turn right onto Mowry Avenue
1.4 mi · 3 min · Mowry Avenue
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26
Arrive at your destination
0 m · 1 sec · Mowry Avenue
Car Route Details
A richer read on the saved driving route between Costa Mesa 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.
Slight Chance Rain Showers leaving Costa Mesa and Mostly Cloudy then Slight Chance Light Rain near Fremont.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Costa Mesa to Fremont?
The road trip is about 399.9 miles (643.5 km) and usually takes 06h 48m 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 198.5 miles from Costa Mesa and 201.3 miles from Fremont.
How much longer is the road route than the straight-line distance?
The direct path is about 353.7 miles (569.2 km), while the road route adds roughly 46.2 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 $81.40 one way or $162.80 round trip. Estimated CO2 is about 125.4 kg one way.
What should you check before leaving?
Before you leave, expect Slight Chance Rain Showers around Costa Mesa and Mostly Cloudy then Slight Chance Light Rain near Fremont.
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 Costa Mesa and Fremont. Straight-line distance: 353.7 mi (569.23 km).
#1 Costa Mesa
The most populous city in Orange County, California.
| Population | 112,366 |
| Coordinates | 33.6411300, -117.9186700 |
| Altitude | 30 |
| 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: 644 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 13h 19m |
| 40 mph (64.37 km/h) | 09h 59m |
| 50 mph (80.47 km/h) | 07h 59m |
| 60 mph (96.56 km/h) | 06h 39m |
| 70 mph (112.65 km/h) | 05h 42m |
| 80 mph (129 km/h) | 04h 59m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $5.77 | $81.40 | $162.80 |
| Mid-grade | $6.07 | $85.59 | $171.18 |
| Premium | $6.24 | $88.09 | $176.18 |
| Diesel | $7.57 | $106.77 | $213.54 |
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 · May 04, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.