How far is Polson, MT from Lewistown, MT?
The driving distance from Polson, MT to Lewistown, MT is about 342.1 miles (550.6 km), with a travel time of about 05h 50m by car.
- The straight-line flight distance is about 225.7 miles (363.3 km).
- For a round trip, plan for roughly 11h 41m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 8:00 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 05h 50m.
An early departure helps you fit a real stop into the day without turning the return into a late-night drive.
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.
Town in Cascade County, Montana, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Chance Light Rain then Showers And Thunderstorms
Partly Sunny then Showers And Thunderstorms Likely
Driving Route Map
The map below follows the saved road route between Polson and Lewistown.
Turn-by-Turn Driving Directions
Step-by-step road directions between Polson and Lewistown.
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1
Start on Main Street
94 m · 10 sec · Main Street
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2
Turn right onto 2nd Avenue East
60.6 mi · 1 hr 15 min · 2nd Avenue East
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3
Continue on West Broadway Street
925 ft · 24 sec · West Broadway Street
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4
Continue on West Broadway Street
733 ft · 18 sec · West Broadway Street
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5
Take the exit slight right toward I 90 East: Missoula
13.4 mi · 15 min
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6
Take the exit slight right toward MT 200 East: Bonner, Great Falls
148.5 mi · 2 hr 48 min
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7
Take the exit slight right toward I 15 South: Great Falls
1323 ft · 32 sec
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8
Merge slight left onto First Special Service Force Memorial Highway
9.5 mi · 9 min · First Special Service Force Memorial Highway
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9
Take the exit slight right toward I 15 Business
1262 ft · 31 sec
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10
Turn left onto Central Avenue West
1.5 mi · 2 min · Central Avenue West
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11
Continue on First Avenue North Bridge
1055 ft · 18 sec · First Avenue North Bridge
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12
Continue on 1st Avenue North
1.2 mi · 2 min · 1st Avenue North
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13
Turn right onto 14th Street North
1.3 km · 1 min · 14th Street North
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14
Turn left onto 10th Avenue South
22.6 mi · 25 min · 10th Avenue South
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15
Enter the roundabout and take exit 2 toward the route
68 m · 3 sec
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16
Exit the roundabout
1606 ft · 21 sec
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17
Turn straight
64.3 mi · 1 hr 10 min
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18
Continue straight
14.7 mi · 16 min
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19
Continue on US Highway 87
1.5 mi · 2 min · US Highway 87
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20
Continue on West Main Street
1.3 km · 2 min · West Main Street
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21
Turn right onto 6th Avenue South
121 m · 17 sec · 6th Avenue South
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22
Arrive at your destination
0 m · 1 sec · 6th Avenue South
Car Route Details
A richer read on the saved driving route between Polson and Lewistown.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
MT 200 East
Take the exit slight right toward MT 200 East: Bonner, Great Falls
148 mi · 02h 48m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A longer out-and-back drive
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
Chance Light Rain then Showers And Thunderstorms leaving Polson and Partly Sunny then Showers And Thunderstorms Likely near Lewistown.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Polson to Lewistown?
The road trip is about 342.1 miles (550.6 km) and usually takes 05h 50m in normal driving conditions.
Is this a same-day trip or an overnight route?
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
What is the halfway point on this route?
Cascade is a useful midpoint, sitting about 170.1 miles from Polson and 172 miles from Lewistown.
How much longer is the road route than the straight-line distance?
The direct path is about 225.7 miles (363.3 km), while the road route adds roughly 116.4 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 8:00 AM MDT. If you want a more comfortable same-day return, try to leave by 5:18 AM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $46.99 one way or $93.98 round trip. Estimated CO2 is about 107.3 kg one way.
What should you check before leaving?
Before you leave, expect Chance Light Rain then Showers And Thunderstorms around Polson and Partly Sunny then Showers And Thunderstorms Likely near Lewistown.
Flight Path Map
This map shows the direct air route between Polson and Lewistown. Straight-line distance: 225.74 mi (363.3 km).
#1 Polson
City in Lake County, Montana, United States
| Population | 5,181 |
| Coordinates | 47.6935500, -114.1631700 |
| Altitude | 892 |
| Country | United States |
#2 Lewistown
City in Montana, United States
| Population | 5,905 |
| Coordinates | 47.0624700, -109.4282400 |
| Altitude | 1203 |
| Country | United States |
End: 6th Avenue South (-109.428026, 47.06261)
Estimated Travel Time
Distance: 551 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 11h 23m |
| 40 mph (64.37 km/h) | 08h 33m |
| 50 mph (80.47 km/h) | 06h 50m |
| 60 mph (96.56 km/h) | 05h 42m |
| 70 mph (112.65 km/h) | 04h 53m |
| 80 mph (129 km/h) | 04h 16m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $46.99 | $93.98 |
| Mid-grade | $4.23 | $51.07 | $102.14 |
| Premium | $4.55 | $54.91 | $109.81 |
| Diesel | $5.41 | $65.32 | $130.65 |
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 · Apr 23, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.