How far is Great Falls, MT from Libby, MT?
The driving distance from Great Falls, MT to Libby, MT is about 312.7 miles (503.3 km), with a travel time of about 06h 05m by car.
- The straight-line flight distance is about 206.2 miles (331.9 km).
- For a round trip, plan for roughly 12h 11m 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 06h 05m.
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.
Town in Lake County, Florida, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Partly Sunny then Showers And Thunderstorms Likely
Showers And Thunderstorms
Driving Route Map
The map below follows the saved road route between Great Falls and Libby.
Turn-by-Turn Driving Directions
Step-by-step road directions between Great Falls and Libby.
-
1
Start on 4th Street South
49 m · 9 sec · 4th Street South
-
2
Turn right onto 5th Avenue South
862 ft · 40 sec · 5th Avenue South
-
3
At the end of the road, turn right onto 2nd Street South
686 ft · 24 sec · 2nd Street South
-
4
Turn left onto 3rd Avenue South
683 ft · 20 sec · 3rd Avenue South
-
5
At the end of the road, turn right onto River Drive South
2365 ft · 49 sec · River Drive South
-
6
Turn left onto First Avenue North Bridge
1148 ft · 27 sec · First Avenue North Bridge
-
7
Continue on Central Avenue West
1.4 mi · 2 min · Central Avenue West
-
8
Take the exit right
1311 ft · 32 sec
-
9
Merge slight left onto First Special Service Force Memorial Highway
9.4 mi · 9 min · First Special Service Force Memorial Highway
-
10
Take the exit slight right
8.3 mi · 10 min
-
11
Turn right
32.2 mi · 36 min
-
12
Enter the roundabout and take exit 2 toward West Division Street
157 m · 18 sec · West Division Street
-
13
Exit the rotary onto West Division Street
44 m · 5 sec · West Division Street
-
14
Turn slight right onto Main Avenue North
6 mi · 8 min · Main Avenue North
-
15
Continue on 13th Lane Northwest
12.9 mi · 15 min · 13th Lane Northwest
-
16
Continue on United States Highway 89
49.2 mi · 53 min · United States Highway 89
-
17
At the end of the road, turn left
3.9 mi · 7 min
-
18
Enter the roundabout and take exit 3 toward the route
75 m · 4 sec
-
19
Exit the roundabout
72.3 mi · 1 hr 20 min
-
20
Turn right
842 ft · 1 min
-
21
At the end of the road, turn left onto Old US 2
1930 ft · 1 min · Old US 2
-
22
Turn right onto US Route 2
7.5 mi · 10 min · US Route 2
-
23
Continue on US 2
1.7 mi · 2 min · US 2
-
24
Turn left
9.7 mi · 12 min
-
25
At the end of the road, turn right
5.7 mi · 8 min
-
26
Continue on US Route 2
1.2 mi · 2 min · US Route 2
-
27
Continue on East Idaho Street
3.6 mi · 8 min · East Idaho Street
-
28
Enter the roundabout and take exit 2 toward the route
29 m · 1 sec
-
29
Exit the roundabout
85.7 mi · 1 hr 37 min
-
30
Arrive at your destination
0 m · 1 sec · West 9th Street
Car Route Details
A richer read on the saved driving route between Great Falls and Libby.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
East Idaho Street
Exit the roundabout
85.7 mi · 01h 37m
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.
Partly Sunny then Showers And Thunderstorms Likely leaving Great Falls and Showers And Thunderstorms near Libby.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Great Falls to Libby?
The road trip is about 312.7 miles (503.3 km) and usually takes 06h 05m 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?
Ferndale is a useful midpoint, sitting about 156.2 miles from Great Falls and 156.6 miles from Libby.
How much longer is the road route than the straight-line distance?
The direct path is about 206.2 miles (331.9 km), while the road route adds roughly 106.5 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 $42.94 one way or $85.88 round trip. Estimated CO2 is about 98 kg one way.
What should you check before leaving?
Before you leave, expect Partly Sunny then Showers And Thunderstorms Likely around Great Falls and Showers And Thunderstorms near Libby.
Stop Ideas Near Ferndale
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 Ferndale.
Essex
Whitefish station
West Glacier
East Glacier Park
Flight Path Map
This map shows the direct air route between Great Falls and Libby. Straight-line distance: 206.25 mi (331.92 km).
#1 Great Falls
Town in Cascade County, Montana, United States
| Population | 58,353 |
| Coordinates | 47.5002400, -111.3008100 |
| Altitude | 1015 |
| Country | United States |
#2 Libby
City in Montana, United States
| Population | 2,845 |
| Coordinates | 48.3882900, -115.5560000 |
| Altitude | 639 |
| Country | United States |
End: Libby (-115.556, 48.38829)
Estimated Travel Time
Distance: 503 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 10h 25m |
| 40 mph (64.37 km/h) | 07h 49m |
| 50 mph (80.47 km/h) | 06h 15m |
| 60 mph (96.56 km/h) | 05h 12m |
| 70 mph (112.65 km/h) | 04h 28m |
| 80 mph (129 km/h) | 03h 54m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $42.94 | $85.88 |
| Mid-grade | $4.23 | $46.67 | $93.34 |
| Premium | $4.55 | $50.18 | $100.35 |
| Diesel | $5.41 | $59.69 | $119.39 |
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.