How far is Fremont, CA from Union City, CA?
The driving distance from Fremont, CA to Union City, CA is about 102.4 miles (164.8 km), with a travel time of about 02h 03m by car.
- The straight-line flight distance is about 78.5 miles (126.3 km).
- For a round trip, plan for roughly 04h 06m 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 02h 03m.
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 Napa Valley, California
Route Weather Snapshot
Check the forecast at both ends before you head out.
Clear
Driving Route Map
The map below follows the saved road route between Fremont and Union City.
Turn-by-Turn Driving Directions
Step-by-step road directions between Fremont and Union City.
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1
Start on Old River Road
731 ft · 20 sec · Old River Road
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2
Take the ramp left toward I 5 North
1759 ft · 43 sec
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3
Merge slight left onto Westside Freeway
5.5 mi · 6 min · Westside Freeway
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4
Take the exit slight right toward CA 113 South: Main Street, Woodland
1457 ft · 40 sec
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5
Continue on East Main Street
2299 ft · 1 min · East Main Street
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6
Take the ramp left toward CA 113 South: Davis
2270 ft · 55 sec
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7
Merge slight left onto Vic Fazio Highway
10.7 mi · 12 min · Vic Fazio Highway
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8
Merge slight left onto Dwight D. Eisenhower Highway
42.1 mi · 49 min · Dwight D. Eisenhower Highway
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9
Continue on Carquinez Bridge
1.6 km · 1 min · Carquinez Bridge
-
10
Continue on Eastshore Freeway
1847 ft · 24 sec · Eastshore Freeway
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11
Continue on Linus F. Claeys Freeway
3.4 mi · 4 min · Linus F. Claeys Freeway
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12
Continue on Eastshore Freeway
14.3 mi · 17 min · Eastshore Freeway
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13
Keep slight left to continue on Interstate Highway 80
1321 ft · 21 sec · Interstate Highway 80
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14
Keep slight right to continue on Nimitz Freeway
14.3 mi · 18 min · Nimitz Freeway
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15
Keep slight left
5.6 mi · 6 min
-
16
Keep slight right to continue on Nimitz Freeway
1.5 mi · 2 min · Nimitz Freeway
-
17
Take the exit slight right toward Whipple Road, Dyer Street
1823 ft · 46 sec
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18
Continue on Whipple Road
1.2 km · 2 min · Whipple Road
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19
Turn left onto Union City Boulevard
1.1 km · 1 min · Union City Boulevard
-
20
Turn right onto Cambridge Way
59 m · 9 sec · Cambridge Way
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21
Arrive at your destination
0 m · 1 sec · Cambridge Way
Car Route Details
A richer read on the saved driving route between Fremont and Union City.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
Dwight D. Eisenhower Highway
Merge slight left onto Dwight D. Eisenhower Highway
42.1 mi · 00h 49m
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 Fremont and Clear near Union City.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Fremont to Union City?
The road trip is about 102.4 miles (164.8 km) and usually takes 02h 03m 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?
American Canyon is a useful midpoint, sitting about 51.2 miles from Fremont and 51.2 miles from Union City.
How much longer is the road route than the straight-line distance?
The direct path is about 78.5 miles (126.3 km), while the road route adds roughly 23.9 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 2:24 PM PDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $20.83 one way or $41.65 round trip. Estimated CO2 is about 32.1 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Fremont and Clear near Union City.
Stop Ideas Near American Canyon
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 American Canyon.
Marine World (Seasonal), Vallejo, California
Vallejo, California
Martinez station
Suisun–Fairfield station
Flight Path Map
This map shows the direct air route between Fremont and Union City. Straight-line distance: 78.49 mi (126.31 km).
#1 Fremont
Fremont is a place in California, United States.
| Population | 0 |
| Coordinates | 38.6765700, -121.6349600 |
| Altitude | 7 |
| Country | United States |
#2 Union City
A city in Placer County, California.
| Population | 74,107 |
| Coordinates | 37.5963232, -122.0816297 |
| Altitude | 3 |
| Country | United States |
End: Union City (-122.08163, 37.596323)
Estimated Travel Time
Distance: 165 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 03h 24m |
| 40 mph (64.37 km/h) | 02h 33m |
| 50 mph (80.47 km/h) | 02h 02m |
| 60 mph (96.56 km/h) | 01h 42m |
| 70 mph (112.65 km/h) | 01h 27m |
| 80 mph (129 km/h) | 01h 16m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $5.77 | $20.83 | $41.65 |
| Mid-grade | $6.07 | $21.90 | $43.80 |
| Premium | $6.24 | $22.54 | $45.07 |
| Diesel | $7.57 | $27.32 | $54.63 |
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 · Jun 10, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.