How far is San Diego, CA from Thermal, CA?
The driving distance from San Diego, CA to Thermal, CA is about 151.9 miles (244.4 km), with a travel time of about 02h 59m by car.
- The straight-line flight distance is about 87.2 miles (140.3 km).
- For a round trip, plan for roughly 05h 59m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 8:00 AM to 10:00 AM PDT.
Reverse, save, or send this route
This route works well as a day trip with time at the destination. Copy the route link, send it to another device, or print a clean version before you head out.
This route works well as a day trip with time at the destination.
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 02h 59m.
A morning start gives you useful time at the destination and keeps the return out of the late evening.
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.
Census-designated place in Riverside County, California, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Sunny
Driving Route Map
The map below follows the saved road route between San Diego and Thermal.
Turn-by-Turn Driving Directions
Step-by-step road directions between San Diego and Thermal.
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1
Start on Front Street
8 m · 6 sec · Front Street
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2
Turn left onto West Broadway
3088 ft · 1 min · West Broadway
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3
Turn left onto 11th Avenue
1146 ft · 25 sec · 11th Avenue
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4
Continue on Cabrillo Parkway
2.4 mi · 3 min · Cabrillo Parkway
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5
Continue on Cabrillo Freeway
8.3 mi · 10 min · Cabrillo Freeway
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6
Keep slight left
2688 ft · 35 sec
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7
Continue on Semper Fi Highway
1.8 mi · 2 min · Semper Fi Highway
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8
Continue on Escondido Freeway
3.1 mi · 4 min · Escondido Freeway
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9
Continue on Tony Gwynn Memorial Freeway
4.6 mi · 5 min · Tony Gwynn Memorial Freeway
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10
Continue on Escondido Freeway
5.9 mi · 7 min · Escondido Freeway
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11
Keep slight left to continue on Escondido Freeway
6.9 mi · 8 min · Escondido Freeway
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12
Continue on Avocado Highway
21.9 mi · 23 min · Avocado Highway
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13
Continue on Escondido Freeway
4.4 mi · 5 min · Escondido Freeway
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14
Take the exit slight right toward CA 79 North: Winchester Road
1382 ft · 38 sec
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15
Turn right onto Winchester Road
13.3 mi · 19 min · Winchester Road
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16
Turn right onto Domenigoni Parkway
4.9 mi · 6 min · Domenigoni Parkway
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17
Turn left onto Sanderson Avenue
1117 ft · 21 sec · Sanderson Avenue
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18
Continue on South Sanderson Avenue
2.1 mi · 4 min · South Sanderson Avenue
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19
Continue on North Sanderson Avenue
7.2 mi · 11 min · North Sanderson Avenue
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20
Continue on Lamb Canyon Road
5.7 mi · 7 min · Lamb Canyon Road
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21
Continue on Beaumont Avenue
1746 ft · 34 sec · Beaumont Avenue
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22
Take the exit right toward I 10 East
1200 ft · 29 sec
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23
Merge slight left onto Pearl Harbor Memorial Highway
17.2 mi · 18 min · Pearl Harbor Memorial Highway
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24
Keep slight left to continue on Sonny Bono Memorial Freeway
32.5 mi · 35 min · Sonny Bono Memorial Freeway
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25
Keep slight right to continue on CA 86 South: CA 86 South, Brawley, El Centro
6.3 mi · 7 min
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26
Take the exit slight right toward Airport Blvd
1454 ft · 44 sec
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27
Turn right onto Airport Boulevard
2543 ft · 55 sec · Airport Boulevard
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28
Turn right onto Palm Street
653 ft · 33 sec · Palm Street
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29
Turn right onto Grapefruit Boulevard
1609 ft · 29 sec · Grapefruit Boulevard
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30
Arrive at your destination
0 m · 1 sec · Grapefruit Boulevard
Car Route Details
A richer read on the saved driving route between San Diego and Thermal.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
Sonny Bono Memorial Freeway
Keep slight left to continue on Sonny Bono Memorial Freeway
32.5 mi · 00h 35m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A comfortable day-trip route
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
Sunny leaving San Diego and Sunny near Thermal.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from San Diego to Thermal?
The road trip is about 151.9 miles (244.4 km) and usually takes 02h 59m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
What is the halfway point on this route?
Homeland is a useful midpoint, sitting about 75.9 miles from San Diego and 75.9 miles from Thermal.
How much longer is the road route than the straight-line distance?
The direct path is about 87.2 miles (140.3 km), while the road route adds roughly 64.7 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 8:00 AM to 10:00 AM PDT. If you want a more comfortable same-day return, try to leave by 12:30 PM PDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $33.56 one way or $67.12 round trip. Estimated CO2 is about 47.6 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around San Diego and Sunny near Thermal.
Stop Ideas Near Homeland
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Best Western Plus Diamond Valley Inn
Rotary Park
H&R Block
Superior Court of California, County of Riverside - Temecula Courthouse
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Homeland.
Sun City, California
Hemet (West Florida Ave), California
Hemet (Devonshire Ave), California
Perris, California
Flight Path Map
This map shows the direct air route between San Diego and Thermal. Straight-line distance: 87.15 mi (140.26 km).
#1 San Diego
The eighth most populous city in the United States and the center of the San Diego metropolitan area.
| Population | 1,422,420 |
| Coordinates | 32.7157100, -117.1647200 |
| Altitude | 20 |
| Country | United States |
#2 Thermal
Situated within Riverside County's Coachella Valley near the Salton Sea, this desert community lies at an elevation of approximately 118 feet below sea level.
| Population | 0 |
| Coordinates | 33.6403000, -116.1394500 |
| Altitude | -36 |
| Country | United States |
End: Thermal (-116.13945, 33.6403)
Estimated Travel Time
Distance: 244 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 05h 03m |
| 40 mph (64.37 km/h) | 03h 47m |
| 50 mph (80.47 km/h) | 03h 02m |
| 60 mph (96.56 km/h) | 02h 31m |
| 70 mph (112.65 km/h) | 02h 10m |
| 80 mph (129 km/h) | 01h 53m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $6.26 | $33.56 | $67.12 |
| Mid-grade | $6.50 | $34.83 | $69.67 |
| Premium | $6.69 | $35.85 | $71.71 |
| Diesel | $8.41 | $45.09 | $90.19 |
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