How far is Sidney, MT from Hardin, MT?
The driving distance from Sidney, MT to Hardin, MT is about 244.3 miles (393.2 km), with a travel time of about 04h 27m by car.
- The straight-line flight distance is about 213.4 miles (343.5 km).
- For a round trip, plan for roughly 08h 55m 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 04h 27m.
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.
City in Custer County, Montana
Route Weather Snapshot
Check the forecast at both ends before you head out.
Partly Cloudy
Driving Route Map
The map below follows the saved road route between Sidney and Hardin.
Turn-by-Turn Driving Directions
Step-by-step road directions between Sidney and Hardin.
-
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
-
5
Merge slight left
162.7 mi · 2 hr 38 min
-
6
Take the exit slight right
1206 ft · 35 sec
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7
Turn left
18.3 mi · 32 min
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8
Keep slight right
10.7 mi · 16 min
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9
Continue on North Crawford Avenue
1242 ft · 30 sec · North Crawford Avenue
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10
Turn left onto North Crawford Avenue
2759 ft · 2 min · North Crawford Avenue
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11
Arrive at your destination
0 m · 1 sec · North Crawford Avenue
Car Route Details
A richer read on the saved driving route between Sidney and Hardin.
Interchange-aware route
The drive includes several ramps, exits, or merges, so checking the next few maneuvers before busy interchanges is useful.
North Central Avenue
Merge slight left
163 mi · 02h 38m
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.
Mostly Clear leaving Sidney and Partly Cloudy near Hardin.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Sidney to Hardin?
The road trip is about 244.3 miles (393.2 km) and usually takes 04h 27m 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?
Miles City is a useful midpoint, sitting about 122 miles from Sidney and 122.3 miles from Hardin.
How much longer is the road route than the straight-line distance?
The direct path is about 213.4 miles (343.5 km), while the road route adds roughly 30.9 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 8:04 AM MDT.
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 76.6 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Clear around Sidney and Partly Cloudy near Hardin.
Stop Ideas Near Miles City
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 Miles City.
Miles City, MT
Glendive, MT
Flight Path Map
This map shows the direct air route between Sidney and Hardin. Straight-line distance: 213.47 mi (343.54 km).
#1 Sidney
City in Montana, United States
| Population | 6,297 |
| Coordinates | 47.7166800, -104.1563300 |
| Altitude | 594 |
| Country | United States |
#2 Hardin
City in Big Horn County, Montana, United States of America
| Population | 3,705 |
| Coordinates | 45.7324800, -107.6120300 |
| Altitude | 886 |
| Country | United States |
End: Hardin (-107.61203, 45.73248)
Estimated Travel Time
Distance: 393 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 08h 08m |
| 40 mph (64.37 km/h) | 06h 06m |
| 50 mph (80.47 km/h) | 04h 53m |
| 60 mph (96.56 km/h) | 04h 04m |
| 70 mph (112.65 km/h) | 03h 29m |
| 80 mph (129 km/h) | 03h 02m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $33.56 | $67.12 |
| Mid-grade | $4.23 | $36.47 | $72.94 |
| Premium | $4.55 | $39.21 | $78.42 |
| Diesel | $5.41 | $46.65 | $93.30 |
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 16, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.