Foster City, CA to Santa Ana, CA is 403 miles and takes about 7h 31m via Westside Freeway and I 5 Truck, with a fuel budget near $91 and enough daylight to finish in a day. This mostly highway route stays within California, traveling along the Pacific Coast. Given its efficiency and single-day feasibility, it's a straightforward choice for getting between these two points without significant detours. Plan for a direct trip with minimal fuss.
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
201.5 miles from Foster City, CA
A natural place for your longest stop of the day
, about 3h 43m into the drive
.
Main Roads
Road
Distance
Duration
Westside Freeway
224.4 mi
4h
I 5 Truck
83.3 mi
1h 36m
Arthur H. Breed Junior Freeway
28.2 mi
32m
Santa Ana Freeway
26 mi
30m
William Elton Brown Freeway
17 mi
18m
J Arthur Younger Freeway
11.9 mi
13m
Golden State Freeway
5.3 mi
6m
West Jackson Street
1.5 mi
2m
Longest stretch:
Westside Freeway
— 224.4 mi, about 4h
Traffic on I-5
Hour-of-day weekday pattern from 354 FHWA count stations on your route.
Peak
3 PM
~2,402 veh/hr typical
· worst 3,136
Quietest
2 AM
~463 veh/hr
Peak-to-quiet ratio
5.2×
busier at peak than in the quiet hours
12a6anoon6p11p
Averaged across 44 weeks of 2023 FHWA Travel Monitoring Analysis System data. Weekday hours only (Mon–Fri).
Turn-by-Turn Driving Directions
Step-by-step road directions between Foster City, CA and Santa Ana, CA.
1
Start on Shell Boulevard
0.3 mi·32 sec·Shell Boulevard
Use the left / uturn / straight lanes.
2
Turn right onto Metro Center Boulevard
0.1 mi·22 sec·Metro Center Boulevard
Use the right lane.
3
Turn left
0.3 mi·19 sec
Toward CA 92 East: San Mateo Bridge, HaywardUse the left lane.
4
Merge onto CA 92
12 mi·13 min·J Arthur Younger Freeway
Use the straight / slight right lanes.
5
Continue on CA 92
1.5 mi·2 min·West Jackson Street
Use the straight / right lanes.
6
Continue on Foothill Boulevard
0.5 mi·1 min·Foothill Boulevard
Use the straight lane.
7
Turn right onto A Street
0.7 mi·1 min·A Street
Use the right lane.
8
Continue on Redwood Road
0.5 mi·59 sec·Redwood Road
9
Take the ramp
0.3 mi·37 sec
Toward I 580 East: StocktonUse the straight / right lanes.
10
Merge onto I 580
10 mi·11 min·Arthur H. Breed Junior Freeway
Use the straight / slight right lanes.
11
Keep slight right at fork onto I 580
18 mi·20 min·Arthur H. Breed Junior Freeway
Use the straight / slight right lanes.
12
Keep slight right at fork onto I 580
11 mi·11 min·William Elton Brown Freeway
13
Keep slight left at fork onto I 580
5.9 mi·6 min·William Elton Brown Freeway
14
Merge onto I 5
224 mi·4 hr·Westside Freeway
Use the straight / slight right lanes.
15
Keep slight right at fork onto I 5 Truck
58 mi·1 hr 6 min·I 5 Truck
Use the straight / slight right lanes.
16
Keep slight left at fork onto I 5
4.1 mi·4 min·Golden State Freeway
Use the straight / slight right lanes.
17
Keep slight right at fork onto I 5 Truck
0.3 mi·17 sec·I 5 Truck
Exit 158Toward I 405 SouthUse the straight / slight right lanes.
18
Keep slight left at fork onto I 5 Truck
25 mi·29 min·I 5 Truck
Use the straight / slight right lanes.
19
Keep slight left at fork onto I 5
1.3 mi·1 min·Golden State Freeway
Toward CA 60 East, I 5 South: Pomona, Soto Street, Santa AnaUse the slight left / straight lanes.
20
Merge onto I 5
26 mi·30 min·Santa Ana Freeway
Use the straight / slight right lanes.
21
Keep slight right at fork onto I 5
0.2 mi·16 sec·Santa Ana Freeway
Use the straight / slight right lanes.
22
Take the exit
0.8 mi·57 sec
Toward Broadway, Main Street, Santa AnaUse the straight / slight right lanes.
23
Keep slight right at fork
0.3 mi·21 sec
Toward Main Street North, BroadwayUse the straight / slight right lanes.
24
Turn straight onto North Broadway
1.3 mi·2 min·North Broadway
Use the left lane.
25
Turn left onto West 5th Street
0.1 mi·16 sec·West 5th Street
Use the left lane.
26
Turn right onto North Main Street
0.2 mi·30 sec·North Main Street
Use the right lane.
27
Turn right onto West 1st Street
52 ft·1 sec·West 1st Street
Use the right lane.
28
Arrive at destination
West 1st Street
Trip Plan
To make the most of this 7-hour drive, aim for an early morning departure from Foster City to bypass peak traffic. With two recommended stops, you can break up the 403 miles comfortably. Consider your first stop around the halfway point, perhaps near the end of that 224.4-mile stretch on the Westside Freeway, to refuel and stretch your legs. Keep an eye on your fuel gauge, as the $91 budget is an estimate and prices can fluctuate.
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 201.5 miles from Foster City, CA, or about 3h 43m into the drive.
The longest continuous stretch on this route runs about 224.4 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 89 miles or 1h 42m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 201.5 miles or 3h 43m 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 19m
Traffic, exits, and arrival timing usually matter more near Santa Ana, CA than in the middle of the route.
Before You Leave
+
Open the route before leaving Foster City, 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 Foster City, CA
This is one driving day of about 403 miles and 7h 31m.
Your first comfortable stop window is around 89 miles from Foster City, 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 224.4 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Place data sourced from public business listings. Hours and availability may vary.
Heads-up: tricky spots
5 of 24
5 decision points cluster between mile 0.3 and 401 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
7
0.3 mi into trip|~0m in|Metro Center Boulevard
Turn right onto Metro Center Boulevard
Lane positioning matters here
Use the right lane.
9
0.4 mi into trip|~0m in
Turn left toward CA 92 East: San Mateo Bridge, Hayward
Lane positioning matters here. Multiple destination signs - pick the right one
Use the left lane.
Toward CA 92 East: San Mateo Bridge, Hayward
8
348 mi into trip|~6h 25m in|I 5 Truck
Keep slight right at fork onto I 5 Truck toward I 405 South
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight right lanes.
Exit 158
Toward I 405 South
8
373 mi into trip|~6h 54m in|I 5 / Golden State Freeway
Keep slight left at fork onto I 5 / Golden State Freeway toward CA 60 East, I 5 South: Pomona, Soto Street, Santa Ana
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight left / straight lanes.
Toward CA 60 East, I 5 South: Pomona, Soto Stre...
8
401 mi into trip|~7h 27m in
Keep slight right at fork toward Main Street North, Broadway
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / slight right lanes.
Toward Main Street North, Broadway
Fuel & Cost
Regular Gas
$84.31 one way
$168.63 round trip
$5.31/gal25.4 MPG avg141 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$5.52
$87.57
$175.13
premium
$5.67
$89.88
$179.76
diesel
$4.80
$76.09
$152.19
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$84
Meals
$25–$50
Total
$109–$134
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 141 kg one way.
Prices: EIA weekly data, 2026-07-13.
Driving Electric?
About $42 in charging
· 1 stop
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
120.9
1
$42.32
$19.34
Efficient EV
100.8
1
$35.26
$16.12
EV Truck/SUV
161.2
2
$56.42
$25.79
Gas CO2
141 kg
EV CO2
47 kg (67% 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 Jul 17, 2026
Origin
Foster City, CA
Evening
in Foster City on Monday
Local time
5:35 PM
PDT
Current temp
55°F
Mostly Clear
WSW 6 to 14 mph2% chanceLive forecast
Heat Advisory
Heat Advisory issued July 16 at 12:00PM PDT until July 16 at 11:00PM PDT by NWS Hanford CA
Red Flag Warning
Red Flag Warning issued July 16 at 11:39AM PDT until July 17 at 8:00PM PDT by NWS Medford OR
Destination
Santa Ana, CA
Evening
in Santa Ana on Monday
Local time
5:35 PM
PDT
Current temp
69°F
Partly Cloudy
S 5 to 10 mph4% chanceLive forecast
Heat Advisory
Heat Advisory issued July 16 at 12:00PM PDT until July 16 at 11:00PM PDT by NWS Hanford CA
Red Flag Warning
Red Flag Warning issued July 16 at 11:39AM PDT until July 17 at 8:00PM PDT by NWS Medford OR
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
14 degrees warmer at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
7h 31m 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.
National Parks Near This Route
Worth a detour if your schedule allows.
San Francisco Maritime National Historical Park
National Historical Park
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...
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 347.4
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...
23 mi from route
~57 min detour
Free
near mile 13.9
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...
26 mi from route
~66 min detour
Free
near mile 27.8
Experience a park so rich it supports 19 distinct ecosystems with over 2,000 plant and animal species. Go for a hike, enjoy a vista, have a picnic or learn about the centuries of overlapping history f...
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...
29 mi from route
~72 min detour
Free
near mile 277.9
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
This drive is overwhelmingly on the highway, with 98% of the 403 miles on major freeways. You'll encounter a long stretch of 224.4 miles on the Westside Freeway, indicating extended highway cruising. Expect urban merging and dense exits characteristic of California's major arteries for most of the trip.
98% highway — fuel and pacing are the main things to plan.
28 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 224.4 mi on Westside Freeway.
How Hard Is This Drive?
9/10
This is a straightforward highway drive that stays mostly on Westside Freeway and I 5 Truck. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 0.3 miles in near Metro Center Boulevard.
Driving Effort9/10
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 24 significant decision points across 403 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 0.3 miles (Metro Center Boulevard): Lane positioning matters here; at 0.4 miles: Lane positioning matters here. Multiple destination signs - pick the right one; at 348 miles (I 5 Truck): Highway fork - watch signs carefully. Lane positioning matters here.
Foster City is a quiet suburban city on the Peninsula in the San Francisco Bay Area of California. Primarily residential and lacking in a downtown, it also has a couple of large office parks and several large employers including Gilead, Visa, and Sony.
Doable as a same-day drive at 7h 31m. Total distance: 403 miles.
Family Friendly
Moderate complexity with 2 natural rest stops along the way.
Solo Traveler
7h 31m drive, plan rest stops for pacing.
Frequently Asked Questions
The longest stretch is about 224.4 miles on Westside Freeway. The full list of main roads is in the Roads section above.
Yes — we found about 34 rest areas or service plazas within a short detour of the route (from OpenStreetMap). See the Rest Stops tab under Nearby Places for locations and mile markers. Plan to stretch, use the bathroom, and top off fluids every 2–3 hours on longer drives.
It helps. This route has a higher-than-average number of complex decision points, which get harder in the dark. If the last hour of the trip is on surface roads or mountain grades, aim to arrive at Santa Ana, CA before sunset when you can. Check the Trip Plan for departure windows that land you in daylight.
Only with planning. This is a long drive for kids — consider splitting it into two days rather than pushing through. Plan at least 2 meaningful breaks. There are 34 rest areas along the route for bathroom stops.
The main spots that need attention: at 0.3 miles (Metro Center Boulevard): Lane positioning matters here; at 0.4 miles: Lane positioning matters here. Multiple destination signs - pick the right one; at 348 miles (I 5 Truck): Highway fork - watch signs carefully. Lane positioning matters here.
Yes — San Francisco Maritime National Historical Park, Santa Monica Mountains National Recreation Area and Rosie the Riveter WWII Home Front National Historical Park (6 total within detour distance). See the National Parks section for detour distances and tips on detours.
Not recommended in a single day. At 7.5 hours each way, a round trip means 15.0 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at Santa Ana, CA before the return drive.
