How far is Thompson Falls, MT from San Diego, CA?
The driving distance from Thompson Falls, MT to San Diego, CA is about 1372.9 miles (2209.5 km), with a travel time of about 23h 45m by car.
- The straight-line flight distance is about 1032.5 miles (1661.6 km).
- For a round trip, plan for roughly 47h 31m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 7:30 AM MDT.
Reverse, save, or send this route
This drive is better planned with a longer stop or an overnight stay. Copy the route link, send it to another device, or print a clean version before you head out.
This drive is better planned with a longer stop or an overnight stay.
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 23h 45m.
Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
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 Utah County, Utah, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Patchy Smoke
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Thompson Falls and San Diego.
Turn-by-Turn Driving Directions
Step-by-step road directions between Thompson Falls and San Diego.
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1
Start on Woodland Street
143 m · 22 sec · Woodland Street
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2
At the end of the road, turn right onto East Preston Avenue
130 m · 19 sec · East Preston Avenue
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3
Turn left
48 m · 7 sec
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4
Continue straight
147 m · 28 sec
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5
Turn left onto Main Street
25.6 mi · 38 min · Main Street
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6
Continue on Montana Highway 200
31.5 mi · 47 min · Montana Highway 200
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7
Continue on A Street
7.5 mi · 11 min · A Street
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8
Continue straight
27.3 mi · 32 min
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9
Continue on West Broadway Street
925 ft · 24 sec · West Broadway Street
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10
Continue on West Broadway Street
733 ft · 18 sec · West Broadway Street
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11
Take the exit slight right toward I 90 East: Missoula
121 mi · 1 hr 57 min
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12
Take the exit slight right toward I 15 South: Dillon, Idaho Falls
2694 ft · 1 min
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13
Merge slight left
376.7 mi · 5 hr 57 min
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14
Keep slight left to continue on Veterans Memorial Highway
27.4 mi · 29 min · Veterans Memorial Highway
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15
Keep slight left to continue on Veterans Memorial Highway
8.2 mi · 9 min · Veterans Memorial Highway
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16
Keep slight left to continue on Veterans Memorial Highway
334.8 mi · 5 hr 36 min · Veterans Memorial Highway
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17
Continue on Las Vegas Freeway
123.8 mi · 2 hr 10 min · Las Vegas Freeway
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18
Continue on Barstow and Mojave Freeway
5.7 mi · 6 min · Barstow and Mojave Freeway
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19
Keep slight left to continue on Barstow and Mojave Freeway
1.4 km · 57 sec · Barstow and Mojave Freeway
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20
Merge slight right
151.2 mi · 2 hr 43 min
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21
Continue on CHP Officer Larry L. Wetterling and San Bernardino County Sheriff's Lieutenant Alfred E. Stewart Memorial Highway
5.6 mi · 6 min · CHP Officer Larry L. Wetterling and San Bernardino County Sheriff's Lieutenant Alfred E. Stewart Memorial Highway
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22
Continue on Barstow and Mojave Freeway
6.3 mi · 7 min · Barstow and Mojave Freeway
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23
Continue on Barstow Freeway
1095 ft · 13 sec · Barstow Freeway
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24
Keep slight left to continue on Barstow Freeway
9.3 mi · 10 min · Barstow Freeway
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25
Continue on San Bernardino Freeway
5.6 mi · 6 min · San Bernardino Freeway
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26
Continue on Riverside Freeway
5.3 mi · 6 min · Riverside Freeway
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27
Take the exit slight right toward I 215 South, CA 60 East: San Diego, Indio
5.1 mi · 6 min
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28
Keep slight right to continue on I 215, CA 60 Truck
2512 ft · 33 sec
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29
Keep slight right
36.3 mi · 41 min
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30
Continue on Avocado Highway
21.9 mi · 24 min · Avocado Highway
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31
Continue on Escondido Freeway
3.4 mi · 4 min · Escondido Freeway
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32
Keep slight right to continue on Escondido Freeway
8.7 mi · 10 min · Escondido Freeway
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33
Continue on Tony Gwynn Memorial Freeway
4.5 mi · 5 min · Tony Gwynn Memorial Freeway
-
34
Continue on Escondido Freeway
3.1 mi · 4 min · Escondido Freeway
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35
Continue on Semper Fi Highway
2.2 mi · 3 min · Semper Fi Highway
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36
Take the exit slight right toward CA 163 South
1.2 km · 52 sec
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37
Continue on Cabrillo Freeway
8.2 mi · 9 min · Cabrillo Freeway
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38
Continue on Cabrillo Parkway
1.5 mi · 2 min · Cabrillo Parkway
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39
Continue on Cabrillo Parkway
1.3 km · 1 min · Cabrillo Parkway
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40
Continue on 10th Avenue
1507 ft · 42 sec · 10th Avenue
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41
Turn right onto Broadway
2811 ft · 1 min · Broadway
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42
Turn left onto Front Street
8 m · 1 sec · Front Street
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43
Arrive at your destination
0 m · 1 sec · Front Street
Car Route Details
A richer read on the saved driving route between Thompson Falls and San Diego.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
I 15 South
Merge slight left
377 mi · 05h 57m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
Better with a longer stop
This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.
Patchy Smoke leaving Thompson Falls and Mostly Sunny near San Diego.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Thompson Falls to San Diego?
The road trip is about 1372.9 miles (2209.5 km) and usually takes 23h 45m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.
What is the halfway point on this route?
Santaquin is a useful midpoint, sitting about 686.5 miles from Thompson Falls and 686.4 miles from San Diego.
How much longer is the road route than the straight-line distance?
The direct path is about 1032.5 miles (1661.6 km), while the road route adds roughly 340.4 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 6:00 AM to 7:30 AM MDT. Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $188.62 one way or $377.23 round trip. Estimated CO2 is about 430.6 kg one way.
Do you cross a time zone on this route?
Yes. There is about a 1 hour time difference between Thompson Falls and San Diego, so arrival and return times should be read in local time.
What should you check before leaving?
Before you leave, expect Patchy Smoke around Thompson Falls and Mostly Sunny near San Diego.
Stop Ideas Near Santaquin
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Santaquin.
Provo
Helper
Salt Lake City Intermodal Hub
Salt Lake City Intermodal Hub
Flight Path Map
This map shows the direct air route between Thompson Falls and San Diego. Straight-line distance: 1032.49 mi (1661.63 km).
#1 Thompson Falls
Town in Montana, United States
| Population | 1,432 |
| Coordinates | 47.5948900, -115.3383400 |
| Altitude | 779 |
| Country | United States |
#2 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 |
End: San Diego (-117.16472, 32.71571)
Estimated Travel Time
Distance: 2210 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 45h 44m |
| 40 mph (64.37 km/h) | 34h 19m |
| 50 mph (80.47 km/h) | 27h 27m |
| 60 mph (96.56 km/h) | 22h 52m |
| 70 mph (112.65 km/h) | 19h 36m |
| 80 mph (129 km/h) | 17h 07m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $188.62 | $377.23 |
| Mid-grade | $4.23 | $204.99 | $409.98 |
| Premium | $4.55 | $220.40 | $440.80 |
| Diesel | $5.41 | $262.21 | $524.42 |
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 Montana · Aug 24, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.