How far is Oceanside, CA from San Onofre, CA?
The driving distance from Oceanside, CA to San Onofre, CA is about 21.4 miles (34.4 km), with a travel time of about 00h 29m by car.
- The straight-line flight distance is about 17 miles (27.4 km).
- For a round trip, plan for roughly 00h 58m 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 29m.
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 Oceanside and San Onofre.
Turn-by-Turn Driving Directions
Step-by-step road directions between Oceanside and San Onofre.
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1
Start on Pacific Coast Highway
2390 ft · 1 min · Pacific Coast Highway
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2
Turn right
68 m · 4 sec
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3
Continue on San Luis Rey Mission Expressway
1478 ft · 29 sec · San Luis Rey Mission Expressway
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4
Take the exit right toward I 5 North
1159 ft · 15 sec
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5
Merge slight left onto San Diego Freeway
12.6 mi · 15 min · San Diego Freeway
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6
Keep slight right to continue on San Diego Freeway
4.6 mi · 5 min · San Diego Freeway
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7
Take the exit slight right toward San Onofre, Basilone Road
1184 ft · 37 sec
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8
Turn left onto Basilone Road
142 m · 16 sec · Basilone Road
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9
Continue on Old Pacific Highway
1.8 mi · 4 min · Old Pacific Highway
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10
Continue on Old Pacific Highway
1.1 mi · 2 min · Old Pacific Highway
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11
Arrive at your destination
0 m · 1 sec · Old Pacific Highway
Car Route Details
A richer read on the saved driving route between Oceanside and San Onofre.
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
12.6 mi · 00h 15m
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 Oceanside and Sunny near San Onofre.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Oceanside to San Onofre?
The road trip is about 21.4 miles (34.4 km) and usually takes 00h 29m 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 10.7 miles from Oceanside and 10.7 miles from San Onofre.
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 4.4 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 7:32 PM PDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $4.70 one way or $9.39 round trip. Estimated CO2 is about 6.7 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Oceanside and Sunny near San Onofre.
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 Oceanside and San Onofre. Straight-line distance: 16.99 mi (27.35 km).
#1 Oceanside
The second most populous city in San Diego County, California.
| Population | 174,648 |
| Coordinates | 33.1958700, -117.3794800 |
| Altitude | 20 |
| Country | United States |
#2 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 |
End: San Onofre (-117.5731, 33.38114)
Estimated Travel Time
Distance: 34 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 00h 42m |
| 40 mph (64.37 km/h) | 00h 32m |
| 50 mph (80.47 km/h) | 00h 25m |
| 60 mph (96.56 km/h) | 00h 21m |
| 70 mph (112.65 km/h) | 00h 18m |
| 80 mph (129 km/h) | 00h 15m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $6.26 | $4.70 | $9.39 |
| Mid-grade | $6.50 | $4.87 | $9.75 |
| Premium | $6.69 | $5.02 | $10.03 |
| Diesel | $8.41 | $6.31 | $12.62 |
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