How far is Sidney, MT from Polson, MT?
The driving distance from Sidney, MT to Polson, MT is about 611.7 miles (984.4 km), with a travel time of about 10h 11m by car.
- The straight-line flight distance is about 465 miles (748.3 km).
- For a round trip, plan for roughly 20h 23m 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 10h 11m.
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 and county seat of Sweet Grass County, Montana, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Cloudy
Sunny
Driving Route Map
The map below follows the saved road route between Sidney and Polson.
Turn-by-Turn Driving Directions
Step-by-step road directions between Sidney and Polson.
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1
Start on North Central Avenue
2.5 mi · 3 min · North Central Avenue
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2
Enter the roundabout and take exit 2 toward the route
41 m · 2 sec
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3
Exit the roundabout
48.9 mi · 56 min
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4
Take the exit right
1385 ft · 34 sec
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5
Merge slight left
212.8 mi · 3 hr 31 min
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6
Merge slight left
2.8 mi · 3 min
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7
Continue straight
112.8 mi · 1 hr 52 min
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8
Continue straight
7 mi · 7 min
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9
Continue straight
113.4 mi · 1 hr 54 min
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10
Keep slight left to continue on I 90 West: Missoula
121.8 mi · 1 hr 57 min
-
11
Take the exit slight right toward US 93 North, MT 200 West: Kalispell
1009 ft · 25 sec
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12
Keep slight right to continue on US 93 North, MT 200 West: Kalispell
60.4 mi · 1 hr 15 min
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13
Turn left onto Main Street
94 m · 6 sec · Main Street
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14
Arrive at your destination
0 m · 1 sec · Main Street
Car Route Details
A richer read on the saved driving route between Sidney and Polson.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
North Central Avenue
Merge slight left
213 mi · 03h 31m
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.
Mostly Cloudy leaving Sidney and Sunny near Polson.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Sidney to Polson?
The road trip is about 611.7 miles (984.4 km) and usually takes 10h 11m 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?
Big Timber is a useful midpoint, sitting about 340.9 miles from Sidney and 270.8 miles from Polson.
How much longer is the road route than the straight-line distance?
The direct path is about 465 miles (748.3 km), while the road route adds roughly 146.7 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 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 $97.03 one way or $194.05 round trip. Estimated CO2 is about 191.9 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Cloudy around Sidney and Sunny near Polson.
Stop Ideas Near Big Timber
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 Big Timber.
Livingston, MT
Bozeman, MT
Billings, MT
Flight Path Map
This map shows the direct air route between Sidney and Polson. Straight-line distance: 464.96 mi (748.28 km).
#1 Sidney
City in Montana, United States
| Population | 6,297 |
| Coordinates | 47.7166800, -104.1563300 |
| Altitude | 594 |
| Country | United States |
#2 Polson
City in Lake County, Montana, United States
| Population | 5,181 |
| Coordinates | 47.6935500, -114.1631700 |
| Altitude | 892 |
| Country | United States |
End: Main Street (-114.163409, 47.69355)
Estimated Travel Time
Distance: 984 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 20h 22m |
| 40 mph (64.37 km/h) | 15h 17m |
| 50 mph (80.47 km/h) | 12h 13m |
| 60 mph (96.56 km/h) | 10h 11m |
| 70 mph (112.65 km/h) | 08h 44m |
| 80 mph (129 km/h) | 07h 37m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.49 | $97.03 | $194.05 |
| Mid-grade | $4.83 | $104.17 | $208.34 |
| Premium | $5.19 | $112.12 | $224.23 |
| Diesel | $6.11 | $131.91 | $263.83 |
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 · Oct 15, 2026