How far is San Onofre, CA from Oceanside, CA?
The driving distance from San Onofre, CA to Oceanside, CA is about 18.8 miles (30.3 km), with a travel time of about 00h 19m by car.
- The straight-line flight distance is about 17 miles (27.4 km).
- For a round trip, plan for roughly 00h 39m 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 19m.
This is a short drive, so your comfort window is wide. Traffic and current weather matter more than the clock.
This departure sits inside the recommended comfort window for the route.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
The most populous city in Orange County, California.
Route Weather Snapshot
Check the forecast at both ends before you head out.
Sunny
Sunny
Driving Route Map
The map below follows the saved road route between San Onofre and Oceanside.
Turn-by-Turn Driving Directions
Step-by-step road directions between San Onofre and Oceanside.
-
1
Start on Old Pacific Highway
1.1 km · 1 min · Old Pacific Highway
-
2
Take the ramp right toward I 5 South: San Diego
1320 ft · 32 sec
-
3
Merge slight left onto San Diego Freeway
17 mi · 20 min · San Diego Freeway
-
4
Take the exit slight right toward Coast Highway
1490 ft · 36 sec
-
5
Merge slight left onto San Luis Rey Mission Expressway
645 ft · 16 sec · San Luis Rey Mission Expressway
-
6
Turn left onto North Coast Highway
95 m · 11 sec · North Coast Highway
-
7
Continue on Pacific Coast Highway
2221 ft · 1 min · Pacific Coast Highway
-
8
Arrive at your destination
0 m · 1 sec · Pacific Coast Highway
Car Route Details
A richer read on the saved driving route between San Onofre and Oceanside.
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.
San Diego Freeway
Merge slight left onto San Diego Freeway
17 mi · 00h 20m
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 San Onofre and Sunny near Oceanside.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from San Onofre to Oceanside?
The road trip is about 18.8 miles (30.3 km) and usually takes 00h 19m 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?
San Clemente is a useful midpoint, sitting about 9.4 miles from San Onofre and 9.4 miles from Oceanside.
How much longer is the road route than the straight-line distance?
The direct path is about 17 miles (27.4 km), while the road route adds roughly 1.8 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 7:50 PM PDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $4.13 one way or $8.26 round trip. Estimated CO2 is about 5.9 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around San Onofre and Sunny near Oceanside.
Stop Ideas Near San Clemente
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Carlsbad Inn Beach Resort
San Clemente Business Licenses
City of San Clemente City Hall
Carlsbad Village Inn
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to San Clemente.
San Clemente Pier station
San Juan Capistrano
Irvine Transportation Center
Oceanside Transit Center
Flight Path Map
This map shows the direct air route between San Onofre and Oceanside. Straight-line distance: 16.99 mi (27.35 km).
#1 San Onofre
Located on the Pacific coast of northern San Diego County at an elevation of roughly 30 feet, this area features rugged coastal bluffs overlooking San Onofre State Beach.
| Population | 0 |
| Coordinates | 33.3811400, -117.5731000 |
| Altitude | 9 |
| Country | United States |
#2 Oceanside
The second most populous city in San Diego County, California.
| Population | 174,648 |
| Coordinates | 33.1958700, -117.3794800 |
| Altitude | 20 |
| Country | United States |
End: North Coast Highway (-117.379517, 33.1959)
Estimated Travel Time
Distance: 30 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 00h 37m |
| 40 mph (64.37 km/h) | 00h 28m |
| 50 mph (80.47 km/h) | 00h 22m |
| 60 mph (96.56 km/h) | 00h 18m |
| 70 mph (112.65 km/h) | 00h 16m |
| 80 mph (129 km/h) | 00h 14m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $6.26 | $4.13 | $8.26 |
| Mid-grade | $6.50 | $4.29 | $8.58 |
| Premium | $6.69 | $4.41 | $8.83 |
| Diesel | $8.41 | $5.55 | $11.11 |
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 · Oct 15, 2026