How far is Los Angeles, CA from Diamond Bar, CA?
The driving distance from Los Angeles, CA to Diamond Bar, CA is about 28.5 miles (45.8 km), with a travel time of about 00h 35m by car.
- The straight-line flight distance is about 24.9 miles (40 km).
- For a round trip, plan for roughly 01h 10m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 7:00 AM to 7:00 PM PDT.
Reverse, save, or send this route
This is an easy same-day return drive. Copy the route link, send it to another device, or print a clean version before you head out.
This is an easy same-day return drive.
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 00h 35m.
This is a short drive, so your comfort window is wide. Traffic and current weather matter more than the clock.
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 Los Angeles County, California, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Los Angeles and Diamond Bar.
Turn-by-Turn Driving Directions
Step-by-step road directions between Los Angeles and Diamond Bar.
-
1
Start on West 1st Street
21 m · 10 sec · West 1st Street
-
2
Turn left onto North Main Street
1465 ft · 35 sec · North Main Street
-
3
Turn right onto East Aliso Street
103 m · 13 sec · East Aliso Street
-
4
Take the ramp straight toward US 101 South, I 10 East, I 5 South
776 ft · 19 sec
-
5
Merge slight left onto Santa Ana Freeway
2.1 mi · 3 min · Santa Ana Freeway
-
6
Take the exit slight right toward CA 60 East: Soto Street, Pomona
656 ft · 16 sec
-
7
Keep slight right to continue on CA 60 East: Pomona
2481 ft · 1 min
-
8
Merge slight right onto Pomona Freeway
11.3 mi · 13 min · Pomona Freeway
-
9
Keep slight right to continue on Pomona Freeway
1.3 km · 55 sec · Pomona Freeway
-
10
Keep slight right to continue on Pomona Freeway
1.8 mi · 2 min · Pomona Freeway
-
11
Keep slight right to continue on Pomona Freeway
2.4 mi · 3 min · Pomona Freeway
-
12
Keep slight right to continue on Pomona Freeway
2.6 mi · 3 min · Pomona Freeway
-
13
Keep slight right to continue on Pomona Freeway
2 mi · 2 min · Pomona Freeway
-
14
Keep slight right to continue on Pomona Freeway
3.9 mi · 4 min · Pomona Freeway
-
15
Take the exit slight right toward Diamond Bar Boulevard
939 ft · 29 sec
-
16
Turn left onto North Diamond Bar Boulevard
2321 ft · 1 min · North Diamond Bar Boulevard
-
17
Turn right
26 m · 7 sec
-
18
Turn right
10 m · 2 sec
-
19
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Los Angeles and Diamond Bar.
Turn-heavy local drive
The route has frequent decision points for its length, so lane choice and turn timing will matter more than cruising speed.
Pomona Freeway
Merge slight right onto Pomona Freeway
11.3 mi · 00h 13m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A short regional drive
This route is short enough to handle as a quick errand, commute, or easy same-day return without much planning overhead.
Sunny leaving Los Angeles and Mostly Sunny near Diamond Bar.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Los Angeles to Diamond Bar?
The road trip is about 28.5 miles (45.8 km) and usually takes 00h 35m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route is short enough to handle as a quick errand, commute, or easy same-day return without much planning overhead.
What is the halfway point on this route?
South El Monte is a useful midpoint, sitting about 14.2 miles from Los Angeles and 14.3 miles from Diamond Bar.
How much longer is the road route than the straight-line distance?
The direct path is about 24.9 miles (40 km), while the road route adds roughly 3.6 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 7:00 AM to 7:00 PM PDT. If you want a more comfortable same-day return, try to leave by 7:20 PM PDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $5.77 one way or $11.54 round trip. Estimated CO2 is about 8.9 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Los Angeles and Mostly Sunny near Diamond Bar.
Stop Ideas Near South El Monte
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Your Home Away From Home
Bell Gardens Inn Los Angeles
City of South El Monte City Hall
City of Los Angeles
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to South El Monte.
Pasadena, California
Los Angeles Union Station
Glendale Transportation Center
Fullerton Transportation Center
Flight Path Map
This map shows the direct air route between Los Angeles and Diamond Bar. Straight-line distance: 24.86 mi (40.01 km).
#1 Los Angeles
The second most populous city in the United States and the center of the Los Angeles metropolitan area.
| Population | 3,970,219 |
| Coordinates | 34.0522300, -118.2436800 |
| Altitude | 89 |
| Country | United States |
#2 Diamond Bar
A city in Los Angeles County, California.
| Population | 54,880 |
| Coordinates | 34.0286200, -117.8103400 |
| Altitude | 212 |
| Country | United States |
End: Diamond Bar (-117.81034, 34.02862)
Estimated Travel Time
Distance: 46 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 00h 56m |
| 40 mph (64.37 km/h) | 00h 42m |
| 50 mph (80.47 km/h) | 00h 34m |
| 60 mph (96.56 km/h) | 00h 28m |
| 70 mph (112.65 km/h) | 00h 24m |
| 80 mph (129 km/h) | 00h 21m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $5.77 | $5.77 | $11.54 |
| Mid-grade | $6.07 | $6.07 | $12.13 |
| Premium | $6.24 | $6.24 | $12.49 |
| Diesel | $7.57 | $7.57 | $15.13 |
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 · Apr 19, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.