The drive from Fontana, CA to Union City, CA covers 409.6 miles and takes about 7h 39m behind the wheel.
This route is realistic as a one-day drive if you keep your stops efficient.
The route leans on Westside Freeway, Foothill Freeway, I 5 Truck for much of the mileage,
and the overall profile is highway-focused drive.
The longest uninterrupted segment is about 225.6 miles on Westside Freeway.
At current regular gas prices, budget about $94.14 one way before food or hotel costs.
Trip Pace
Same-day drive is realistic
A same-day return is possible, but it will make for a full day on the road.
Break Rhythm
2 planned breaks
Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
Midpoint
204.8 miles from Fontana, CA
A natural place for your longest stop of the day
, about 3h 51m into the drive
.
Who Is This Route For?
Weekend Trip
Doable as a same-day drive at 7h 39m. Total distance: 409.6 miles.
Family Friendly
Moderate complexity with 2 natural rest stops along the way.
Solo Traveler
7h 39m drive, plan rest stops for pacing.
Drive Character
This is a 7h 39m highway drive covering 409.6 miles, with most of the trip on Westside Freeway and Foothill Freeway. The longest continuous stretch is about 225.6 miles on Westside Freeway.
Most of the miles stay on highways, which makes pacing and fuel planning easier than turn-by-turn city driving.
There are about 32 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
Westside Freeway is the longest continuous segment at about 225.6 miles.
How Hard Is This Drive?
This is a straightforward highway drive that stays mostly on Westside Freeway and Foothill Freeway. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 45 miles in near I 210 / Foothill Freeway.
Driving Effort10/10
High effort - long or complex enough to need steady focus all day
Balances navigation complexity with total wheel time.
This is a demanding drive. With 28 significant decision points across 409.6 miles, you will need to stay alert - especially through interchange areas and urban stretches. Consider splitting it into segments if you are not comfortable with fast highway navigation.
Where does it get tricky?
The main spots that need attention: at 45 miles (I 210 / Foothill Freeway): Highway fork - watch signs carefully. Lane positioning matters here; at 130.1 miles (I 5 / Westside Freeway): Highway fork - watch signs carefully. Lane positioning matters here; at 401 miles: Exit ramp - move to the correct lane early. Lane positioning matters here.
Critical Maneuvers
5 of 28 key points
These are the spots where you need to pay the most attention. Preview them before you drive.
8
45 mi into trip|~53m in|I 210 / Foothill Freeway
Keep slight right at fork onto I 210 / Foothill Freeway toward I 210 West: Sacramento
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight right lanes.
Exit 26A
Toward I 210 West: Sacramento
7
130.1 mi into trip|~2h 31m in|I 5 / Westside Freeway
Keep slight right at fork onto I 5 / Westside Freeway toward I 5 North
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight right lanes.
Toward I 5 North
7
401 mi into trip|~7h 24m in
Take the exit toward Redwood Road
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the slight right lane.
Exit 36
Toward Redwood Road
7
404.8 mi into trip|~7h 31m in
Take the exit toward I 880 South: San Jose
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the slight right lane.
Exit 26A
Toward I 880 South: San Jose
8
407.8 mi into trip|~7h 35m in
Take the exit toward Whipple Road, Dyer Street
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight right lane.
Exit 24
Toward Whipple Road, Dyer Street
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
On the drive from Fontana, CA to Union City, CA, road signs begin pointing toward San Francisco along the way.
San Francisco
355.7 mi in|~6h 33m|via I 580
Main Roads
Road
Distance
Duration
Westside Freeway
225.6 mi
4h 1m
Foothill Freeway
67.2 mi
1h 17m
I 5 Truck
37.1 mi
42m
Arthur H. Breed Junior Freeway
28.3 mi
32m
Golden State Freeway
22.3 mi
25m
William Elton Brown Freeway
17 mi
18m
Sierra Avenue
3 mi
4m
Nimitz Freeway
2.7 mi
3m
Longest stretch:
Westside Freeway
— 225.6 mi, about 4h 1m
Turn-by-Turn Driving Directions
Step-by-step road directions between Fontana, CA and Union City, CA.
1
Start on Merrill Avenue
205 ft·6 sec·Merrill Avenue
2
Turn right onto Sierra Avenue
3.0 mi·4 min·Sierra Avenue
Use the left / straight lanes.
3
Take the ramp
0.3 mi·45 sec
Toward CA 210 WestUse the straight / slight right lanes.
4
Merge onto CA 210
15 mi·17 min·Foothill Freeway
Use the straight / slight right lanes.
5
Keep slight right at fork onto CA 210
1.2 mi·1 min·Foothill Freeway
Use the straight / slight right lanes.
6
Keep slight right at fork onto CA 210
2.4 mi·2 min·Foothill Freeway
Use the straight / slight right lanes.
7
Keep slight right at fork onto CA 210
1.4 mi·1 min·Foothill Freeway
Use the straight / slight right lanes.
8
Keep slight right at fork onto CA 210
1.8 mi·2 min·Foothill Freeway
Use the straight / slight right lanes.
9
Keep slight right at fork onto CA 210
20 mi·23 min·Foothill Freeway
Use the straight / slight right lanes.
10
Keep slight right at fork onto I 210
26 mi·29 min·Foothill Freeway
Exit 26AToward I 210 West: SacramentoUse the straight / slight right lanes.
11
Keep slight right at fork
0.1 mi·9 sec
Use the slight right lane.
12
Merge onto I 5 Truck
1.0 mi·1 min·I 5 Truck
Exit 161A
13
Keep slight left at fork onto I 5 Truck
36 mi·41 min·I 5 Truck
Use the straight / slight right lanes.
14
Keep slight left at fork onto I 5
22 mi·25 min·Golden State Freeway
Use the straight / slight right lanes.
15
Keep slight right at fork onto I 5
226 mi·4 hr 1 min·Westside Freeway
Toward I 5 NorthUse the straight / slight right lanes.
16
Keep slight left at fork onto I 580
16 mi·17 min·William Elton Brown Freeway
Toward I 580 West: Tracy, San Francisco
17
Keep slight right at fork onto I 580 Bypass
1.1 mi·1 min·William Elton Brown Freeway
18
Merge onto I 580
18 mi·20 min·Arthur H. Breed Junior Freeway
Use the straight / slight right lanes.
19
Keep slight right at fork onto I 580
10 mi·11 min·Arthur H. Breed Junior Freeway
Use the straight / slight right lanes.
20
Take the exit
0.2 mi·29 sec
Exit 36Toward Redwood RoadUse the slight right lane.
21
Turn left onto Redwood Road
0.6 mi·1 min·Redwood Road
Use the left / straight / right lanes.
22
Continue on A Street
0.9 mi·1 min·A Street
Use the straight / right lanes.
23
Turn left onto Mission Boulevard
0.3 mi·44 sec·Mission Boulevard
Use the left lane.
24
Turn slight right onto CA 92
1.7 mi·3 min·Jackson Street
Use the right lane.
25
Take the exit
0.4 mi·27 sec
Exit 26AToward I 880 South: San JoseUse the slight right lane.
26
Merge onto I 880
1.2 mi·1 min·Nimitz Freeway
27
Keep slight right at fork onto I 880
1.5 mi·1 min·Nimitz Freeway
28
Take the exit
0.3 mi·46 sec
Exit 24Toward Whipple Road, Dyer StreetUse the slight right lane.
29
Continue on Whipple Road
0.8 mi·1 min·Whipple Road
Use the straight / left lanes.
30
Turn left onto Union City Boulevard
0.7 mi·1 min·Union City Boulevard
Use the left / straight lanes.
31
Turn right onto Cambridge Way
193 ft·8 sec·Cambridge Way
32
Arrive at destination
Cambridge Way
Trip Plan
Morning Departure
Start early — leave by 6-7 AM to arrive at a reasonable hour.
Evening Departure
This is a long drive — plan for a morning departure or consider splitting it into two days.
You can normally do this drive in one day.
Plan roughly 2 meaningful breaks for fuel, food, and rest.
The halfway point lands around 204.8 miles from Fontana, CA, or about 3h 51m into the drive.
The longest continuous stretch on this route runs about 225.6 miles.
This is a comfortable same-day trip.
Departure
Before you leave
Start with fuel, water, and navigation already sorted so the first hour feels easy.
First stop
Around 90 miles or 1h 45m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 204.8 miles or 3h 51m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 6h 26m
Traffic, exits, and arrival timing usually matter more near Union City, CA than in the middle of the route.
Before You Leave
+
Open the route before leaving Fontana, CA so your first major turns are already loaded.
+
Leave with enough water and a charging cable within reach, not packed away.
+
Check your fuel range against the first long segment, especially if you are starting outside city service areas.
+
Pick one backup stop option before the midpoint in case traffic changes your pacing.
Day 1
Settle into the route from Fontana, CA
This is one driving day of about 409.6 miles and 7h 39m.
Your first comfortable stop window is around 90 miles from Fontana, CA.
This route can stay practical as a one-day drive if traffic stays reasonable.
Plan about 2 real breaks rather than only quick fuel stops.
The longest stretch is on Westside Freeway for about 225.6 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 204.8 mi from Fontana, CA
· 3h 51m into the drive
The midpoint is around 204.8 miles from Fontana, CA, which is a good place for a longer meal and fuel stop.
Before the longest stretch
Fuel check
Top up before Westside Freeway if your tank is already low. That segment runs about 225.6 miles.
Arriving in Union City, CA
The final approach into Union City, CA usually feels slower than the middle of the drive, so avoid planning your tightest schedule at the very end.
Try to arrive with enough fuel left to skip an immediate station stop unless you already know the area around Union City, CA.
After long uninterrupted mileage, take five minutes before the last urban segment to reset and refocus on exits, merges, and city traffic.
These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.
National Parks Near This Route
Worth a detour if your schedule allows.
Santa Monica Mountains National Recreation Area
National Recreation Area
The Santa Monica Mountains offer easy access to surprisingly wild places. Experience the famous beaches of Malibu or explore more than 500 miles of trails. The park abounds with historical and cultura...
22 mi from route
~55 min detour
Free
near mile 70.6
Established in 1988, San Francisco Maritime National Historical Park celebrates America’s maritime heritage on the Pacific Coast. Our 50-acre park has grown around Aquatic Park Cove, a protected area...
24 mi from route
~60 min detour
Free
near mile 409.6
On July 17, 1944, a massive explosion jolted the San Francisco East Bay area, shattering windows and lighting up the night sky. At Port Chicago Naval Magazine, 320 men were killed instantly when two s...
25 mi from route
~62 min detour
Free
near mile 395.5
Rosie the Riveter WWII Home Front National Historical Park
National Historical Park
Celebrate and honor the contributions and sacrifices of American civilians on the WWII home front. Discover how diverse communities lived, worked, and interacted. Many faces, many stories, many truths...
26 mi from route
~64 min detour
Free
near mile 395.5
Yes, we can! Widely recognized as the most important Latino leader in the United States during the twentieth century, Cesar Chavez led farm workers and supporters in the establishment of the country's...
28 mi from route
~70 min detour
Free
near mile 127.1
Park data from the National Park Service API. Alerts update every 2 hours.
Fuel & Cost
Regular Gas
$94.14 one way
$188.29 round trip
$5.84/gal25.4 MPG avg143 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$6.02
$97.01
$194.03
premium
$6.18
$99.61
$199.22
diesel
$5.61
$90.43
$180.87
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$94
Meals
$25–$50
Total
$119–$144
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 143.3 kg one way.
Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $43 in charging
· 1 stop
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
122.9
1
$43.01
$19.66
Efficient EV
102.4
1
$35.84
$16.38
EV Truck/SUV
163.8
2
$57.34
$26.21
Gas CO2
143 kg
EV CO2
48 kg (66% less)
Plan for 1 charging stop. A 30-minute DC fast charge mid-route should be enough to complete the trip comfortably.
DC fast charging avg $0.35/kWh. Home charging avg $0.16/kWh. US grid CO2: 0.39 kg/kWh.
Travel Intel
Current conditions at both ends of the drive.
Forecast as of Apr 15, 2026
Origin
Fontana, CA
Late night
in Fontana on Friday
Local time
5:15 AM
PDT
Current temp
76°F
Unavailable
Live forecast
Destination
Union City, CA
Late night
in Union City on Friday
Local time
5:15 AM
PDT
Current temp
67°F
Unavailable
Live forecast
Seasonal Notes
Summer travel usually means heavier construction, hotter rest stops, and busier weekend traffic around major cities.
Winter travel shortens daylight, so a route that looks manageable on paper can feel much longer after dark.
Holiday weekends tend to make both departure and arrival windows slower than the raw route time suggests.
Time zone
Same local time
Origin and destination are on the same clock, so arrival timing is easier to judge at a glance.
Temperature spread
9 degrees cooler at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
7h 39m on the road
Start early — leave by 6-7 AM to arrive at a reasonable hour.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
Frequently Asked Questions
The drive from Fontana, CA to Union City, CA covers 409.6 miles and takes about 7h 39m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are Westside Freeway, Foothill Freeway, I 5 Truck. Most of the drive stays on highways, so watch for ramps and exits.
This is a comfortable same-day trip.
The midpoint is about 204.8 miles from Fontana, CA. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $94.14 one way. This estimate uses 25.4 MPG — your actual cost will vary with your vehicle's fuel efficiency and current gas prices.
Start early — leave by 6-7 AM to arrive at a reasonable hour. This is a long drive — plan for a morning departure or consider splitting it into two days.
Plan about 2 meaningful breaks for fuel, food, or rest. Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
This is a demanding drive. With 28 significant decision points across 409.6 miles, you will need to stay alert - especially through interchange areas and urban stretches. Consider splitting it into segments if you are not comfortable with fast highway navigation.
The main spots that need attention: at 45 miles (I 210 / Foothill Freeway): Highway fork - watch signs carefully. Lane positioning matters here; at 130.1 miles (I 5 / Westside Freeway): Highway fork - watch signs carefully. Lane positioning matters here; at 401 miles: Exit ramp - move to the correct lane early. Lane positioning matters here.
On the drive from Fontana, CA to Union City, CA, road signs begin pointing toward San Francisco along the way.
Yes. Nearby national parks include Santa Monica Mountains National Recreation Area, San Francisco Maritime National Historical Park and Port Chicago Naval Magazine National Memorial. There are 5 parks within detour distance of this route.
How this page is built
Compiled and maintained by the Trip.ovh planning team at COD Solutions Oy (Helsinki). Each route is built from authoritative open government and mapping datasets rather than crowdsourced reviews. Distances and geometry come from
OSRM
over
OpenStreetMap.
Fuel cost uses
EIA
weekly regional averages.
National park proximity is from the
NPS API.
Pages are published only after passing our data-quality checks; our
methodology page
documents refresh cadence, editorial standards, and known limitations.
