Origin
Diamond Bar, CA
Afternoon in Diamond Bar on Sunday
Local time
1:32 PM
PDT
Current temp
53°F
Unavailable
Live forecast
Trip from Diamond Bar, CA to San Diego, CA
Drive Time
2h 13m
Distance
110.5 mi
178 km
Drive Score
8/10
Great drive
Same Day?
Yes, doable
Fuel Cost
$26
one way
EV Charging
Loading...
station data
Best Time to Leave
4 AM
2h 4m
★
6 AM
2h 13m
8 AM
2h 32m
10 AM
2h 20m
12 PM
2h 18m
3 PM
2h 21m
5 PM
2h 31m
8 PM
2h 8m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Diamond Bar, CA
Lany-Jade Mondou
San Diego, CA
Lindsey Willard
Trip Overview
Connecting Diamond Bar to San Diego, this 109.7-mile journey is a straightforward trek across the Pacific Coast region. With a driving time of approximately 1 hour and 49 minutes, it is perfectly suited for a single-day excursion. You will primarily utilize Sunset Crossing Road, CA 57 South, and the Orange Freeway to navigate your way south. Budgeting about $15 for fuel should comfortably cover the trip, making it an affordable regional getaway. Whether you are heading out for business or leisure, the proximity of these two Southern California hubs makes this an easy, manageable drive that requires no overnight stops.
Trip Pace
Same-day drive is realistic
A same-day return is realistic if you keep stops short.
Break Rhythm
0 planned breaks
A short stop every 2 to 3 hours is enough for this drive.
Midpoint
55.3 miles from Diamond Bar, CA
A natural place for your longest stop of the day , about 1h 7m into the drive .
Drive Character
Expect a turn-heavy local drive rather than a monotonous interstate cruise on this route. Because the highway share is 0%, your experience will focus on navigating local roads and connectors rather than long stretches of open freeway. You should remain alert, as the winding nature of the path demands more active steering and attention than a standard highway route. Since there are no designated long, uninterrupted stretches, the drive requires consistent engagement from the driver. It is a practical, functional transit that moves you efficiently through the local landscape.
Most of the miles stay on highways, which makes pacing and fuel planning easier than turn-by-turn city driving.
There are about 27 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
San Diego Freeway is the longest continuous segment at about 76.5 miles.
How Hard Is This Drive?
This is a straightforward highway drive that stays mostly on San Diego Freeway and Orange Freeway. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes early in the drive near Sunset Crossing Road.
Route Complexity
10/10
High effort - long or complex enough to need steady focus all day
This is a demanding drive. With 24 significant decision points across 110.5 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: near the start (Sunset Crossing Road): Lane positioning matters here; at 2.3 miles (CA 57 / Orange Freeway): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 18.7 miles: Highway fork - watch signs carefully. Lane positioning matters here.
Critical Maneuvers
5 of 24 key pointsThese are the spots where you need to pay the most attention. Preview them before you drive.
8
0 mi into trip
|
~0m in
|
Sunset Crossing Road
At end of road, turn right onto Sunset Crossing Road
Lane positioning matters here
Use the none lane.
8
2.3 mi into trip
|
~3m in
|
CA 57 / Orange Freeway
Keep slight right at fork onto CA 57 / Orange Freeway toward CA 57 South, CA 60 Alt West: Santa Ana, Brea Canyon Road
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight right lane.
Toward CA 57 South, CA 60 Alt West: Santa Ana,...
8
18.7 mi into trip
|
~22m in
Keep slight left at fork toward I 5 South: Santa Ana
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight lane.
Exit 1A
Toward I 5 South: Santa Ana
8
19.9 mi into trip
|
~23m in
Keep slight left at fork toward I 5 South
Highway fork - watch signs carefully. Lane positioning matters here
Use the none lane.
Toward I 5 South
8
26.1 mi into trip
|
~33m in
|
Jamboree Road
Turn left onto Jamboree Road toward CA 261 Toll North: Jamboree Road, Riverside
Lane positioning matters here. Multiple destination signs - pick the right one
Use the left lane.
Toward CA 261 Toll North: Jamboree Road, Rivers...
Towns Along This Route
On the drive from Diamond Bar, CA to San Diego, CA, road signs begin pointing toward Riverside along the way.
Riverside
26.1 mi in
|
~33m
|
via Jamboree Road
Main Roads
| Road | Distance | Duration |
|---|---|---|
| San Diego Freeway | 76.5 mi | 1h 29m |
| Orange Freeway | 17.1 mi | 19m |
| Santa Ana Freeway | 9 mi | 10m |
| Walnut Avenue | 2.2 mi | 4m |
| Pomona Freeway | 1.3 mi | 1m |
| Front Street | 0.5 mi | 1m |
| Jamboree Road | 0.5 mi | <1m |
| Newport Avenue | 0.4 mi | <1m |
Longest stretch:
San Diego Freeway
— 76.5 mi, about 1h 29m
Turn-by-Turn Driving Directions
Step-by-step road directions between Diamond Bar, CA and San Diego, CA.
1
Start on this road
39 ft
·
5 sec
·
this road
2
At end of road, turn right onto Sunset Crossing Road
0.1 mi
·
20 sec
·
Sunset Crossing Road
Use the none lane.
3
Take the ramp
0.2 mi
·
23 sec
Toward CA 57 South, CA 60 West: Santa Ana, Los Angeles
4
Merge onto CA 57
0.7 mi
·
47 sec
·
Orange Freeway
5
Merge onto CA 60; CA 57
1.3 mi
·
1 min
·
Pomona Freeway
Use the none / straight / slight right lanes.
6
Keep slight right at fork onto CA 57
405 ft
·
5 sec
·
Orange Freeway
Toward CA 57 South, CA 60 Alt West: Santa Ana, Brea Canyon Road
Use the slight right lane.
7
Keep slight left at fork onto CA 57
0.8 mi
·
56 sec
·
Orange Freeway
Use the none / straight / slight right lanes.
8
Keep slight right at fork onto CA 57
1.5 mi
·
1 min
·
Orange Freeway
Use the none / straight / slight right lanes.
9
Keep slight right at fork onto CA 57
14 mi
·
16 min
·
Orange Freeway
Use the none / straight / slight right lanes.
10
Keep slight left at fork
1.1 mi
·
1 min
Exit 1A
Toward I 5 South: Santa Ana
Use the straight lane.
11
Keep slight left at fork
0.1 mi
·
10 sec
Use the none / straight / slight right lanes.
12
Keep slight left at fork
0.2 mi
·
12 sec
Toward I 5 South
Use the none lane.
13
Merge onto I 5
0.8 mi
·
54 sec
·
Santa Ana Freeway
Use the none lane.
14
Keep slight right at fork onto I 5
0.8 mi
·
52 sec
·
Santa Ana Freeway
Use the none lane.
15
Keep slight right at fork onto I 5
1.2 mi
·
1 min
·
Santa Ana Freeway
Use the none lane.
16
Take the exit
0.7 mi
·
1 min
Exit 102
Toward Newport Avenue
Use the slight right lane.
17
Turn right onto Newport Avenue
0.4 mi
·
44 sec
·
Newport Avenue
Use the right lane.
18
Turn left onto Walnut Avenue
2.2 mi
·
4 min
·
Walnut Avenue
Use the none lane.
19
Turn left onto Jamboree Road
0.5 mi
·
37 sec
·
Jamboree Road
Toward CA 261 Toll North: Jamboree Road, Riverside
Use the left lane.
20
Take the exit
0.3 mi
·
21 sec
Toward I 5 South
21
Merge onto I 5
5.5 mi
·
6 min
·
Santa Ana Freeway
Use the none / straight / slight right lanes.
22
Keep slight left at fork onto I 5
0.8 mi
·
55 sec
·
Santa Ana Freeway
Use the none / straight / slight right lanes.
23
Merge onto I 5
76 mi
·
1 hr 29 min
·
San Diego Freeway
Use the none / straight / slight right lanes.
24
Take the exit
0.2 mi
·
28 sec
Exit 17
Toward Front Street, Civic Center, 2nd Avenue
Use the straight / slight right lanes.
25
Keep slight right at fork
0.1 mi
·
14 sec
Toward Front Street, Civic Center
26
Continue on Front Street
0.5 mi
·
1 min
·
Front Street
Use the straight / left / none lanes.
27
Arrive at destination
Front Street
Trip Plan
Since this is a relatively short trip, you have plenty of flexibility regarding your departure time, though avoiding peak traffic hours is always a smart move in Southern California. You won't need to plan for any formal stops given the sub-two-hour duration, but keeping your fuel tank topped off before leaving Diamond Bar is a good way to ensure a smooth transition. Because this is a turn-heavy route, rely on a reliable GPS to help you navigate the frequent transitions between local roads. With no major highway grinds to worry about, you can focus on the road ahead and reach your destination in San Diego in under two hours.
Morning Departure
Leave by 9 AM and you'll arrive before lunch.
Evening Departure
Even a 4 PM departure gets you there before dark in summer.
You can normally do this drive in one day.
You may only need one short stretch break if traffic stays light.
The halfway point lands around 55.3 miles from Diamond Bar, CA, or about 1h 7m into the drive.
The longest continuous stretch on this route runs about 76.5 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 80 miles or 1h 35m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 55.3 miles or 1h 7m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 1h 48m
Traffic, exits, and arrival timing usually matter more near San Diego, CA than in the middle of the route.
Before You Leave
+
Open the route before leaving Diamond Bar, 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.
Day 1
Settle into the route from Diamond Bar, CA
This is one driving day of about 110.5 miles and 2h 13m.
Your first comfortable stop window is around 80 miles from Diamond Bar, CA.
This route can stay practical as a one-day drive if traffic stays reasonable.
You may only need one short stretch stop if conditions stay smooth.
The longest stretch is on San Diego Freeway for about 76.5 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 55.3 mi from Diamond Bar, CA · 1h 7m into the drive
Mid-route town
Meal stop
55 mi into the route
Best for: Lunch, fuel, and a longer reset
This sits close to the middle of the route, so it works well for the longest stop of the day.
Pacing Suggestions
Fuel and coffee
A short stop after about 80 miles helps settle the day before fatigue starts building.
Meal break
The midpoint is around 55.3 miles from Diamond Bar, CA, which is a good place for a longer meal and fuel stop.
Before the longest stretch
Fuel checkTop up before San Diego Freeway if your tank is already low. That segment runs about 76.5 miles.
Arriving in San Diego, CA
The final approach into San Diego, 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 San Diego, CA.
These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.
Fuel & Cost
Regular Gas
$25.59 one way
$51.18 round trip
$5.88/gal
25.4 MPG avg
39 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $6.07 | $26.39 | $52.78 |
| premium | $6.24 | $27.16 | $54.32 |
| diesel | $5.64 | $24.55 | $49.10 |
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$26
Meals
$25–$50
Total
$51–$76
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 38.7 kg one way. Prices: EIA weekly data, 2026-04-06.
Driving Electric?
About $12 in charging · 0 stops · 67% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 33.2 | 0 | $11.60 | $5.30 |
| Efficient EV | 27.6 | 0 | $9.67 | $4.42 |
| EV Truck/SUV | 44.2 | 0 | $15.47 | $7.07 |
Gas CO2
39 kg
EV CO2
13 kg (67% less)
This trip is well within single-charge range for most EVs. No charging stops needed if you start fully charged.
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.
Destination
San Diego, CA
Afternoon in San Diego on Sunday
Local time
1:32 PM
PDT
Current temp
72°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
19 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
2h 13m on the road
Use the two city cards together: check the sky where you start, then compare it with the local time and temperature at arrival.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
Frequently Asked Questions
The drive from Diamond Bar, CA to San Diego, CA covers 110.5 miles and takes about 2h 13m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are San Diego Freeway, Orange Freeway, Santa Ana Freeway. Most of the drive stays on highways, so watch for ramps and exits.
This is a comfortable same-day trip.
The midpoint is about 55.3 miles from Diamond Bar, CA. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $25.59 one way. This estimate uses 25.4 MPG — your actual cost will vary with your vehicle's fuel efficiency and current gas prices.
Leave by 9 AM and you'll arrive before lunch. Even a 4 PM departure gets you there before dark in summer.
This is a demanding drive. With 24 significant decision points across 110.5 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: near the start (Sunset Crossing Road): Lane positioning matters here; at 2.3 miles (CA 57 / Orange Freeway): Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one; at 18.7 miles: Highway fork - watch signs carefully. Lane positioning matters here.
On the drive from Diamond Bar, CA to San Diego, CA, road signs begin pointing toward Riverside along the way.
Was this route helpful?
Thanks for your feedback!
Your tip has been submitted. Thanks!
/500
Recent Tips
·
Explore More
Continue From San Diego, CA
More trips to San Diego, CA
Explore more options from Diamond Bar, CA or browse trips ending in San Diego, CA.
Looking for more statewide routes? Browse CA road trips.
Explore maps for Diamond Bar, CA or San Diego, CA on MapSof.net.