How far is Billings, MT from Sidney, MT?
The driving distance from Billings, MT to Sidney, MT is about 269.8 miles (434.2 km), with a travel time of about 04h 07m by car.
- The straight-line flight distance is about 245.2 miles (394.6 km).
- For a round trip, plan for roughly 08h 15m 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 07m.
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.
Mostly Sunny then Chance Showers And Thunderstorms
Partly Sunny
Driving Route Map
The map below follows the saved road route between Billings and Sidney.
Turn-by-Turn Driving Directions
Step-by-step road directions between Billings and Sidney.
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1
Start on Montana Avenue
2446 ft · 1 min · Montana Avenue
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2
Turn left onto North 18th Street
128 m · 9 sec · North 18th Street
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3
At the end of the road, turn right onto 1st Avenue North
1.1 km · 1 min · 1st Avenue North
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4
Continue on 1st Avenue North
84 m · 8 sec · 1st Avenue North
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5
Turn right onto US Highway 87 East
1.3 mi · 2 min · US Highway 87 East
-
6
Turn left
1595 ft · 41 sec
-
7
Continue straight
3.1 mi · 4 min
-
8
Keep slight left to continue on I 94 East: Bismark
212.2 mi · 3 hr 33 min
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9
Take the exit slight right toward MT 16: Glendive, Sidney
1422 ft · 38 sec
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10
Turn left
49 mi · 56 min
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11
Enter the roundabout and take exit 2 toward South Central Avenue
40 m · 2 sec · South Central Avenue
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12
Exit the roundabout onto South Central Avenue
2.5 mi · 3 min · South Central Avenue
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13
Arrive at your destination
0 m · 1 sec · North Central Avenue
Car Route Details
A richer read on the saved driving route between Billings and Sidney.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
I 94 East
Keep slight left to continue on I 94 East: Bismark
212 mi · 03h 33m
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 Sunny then Chance Showers And Thunderstorms leaving Billings and Partly Sunny near Sidney.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Billings to Sidney?
The road trip is about 269.8 miles (434.2 km) and usually takes 04h 07m 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 134.8 miles from Billings and 135 miles from Sidney.
How much longer is the road route than the straight-line distance?
The direct path is about 245.2 miles (394.6 km), while the road route adds roughly 24.6 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 8:44 AM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $37.06 one way or $74.12 round trip. Estimated CO2 is about 84.6 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny then Chance Showers And Thunderstorms around Billings and Partly Sunny near Sidney.
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 Billings and Sidney. Straight-line distance: 245.19 mi (394.59 km).
#1 Billings
The most populous city in Montana.
| Population | 117,445 |
| Coordinates | 45.7832900, -108.5006900 |
| Altitude | 952 |
| Country | United States |
#2 Sidney
City in Montana, United States
| Population | 6,297 |
| Coordinates | 47.7166800, -104.1563300 |
| Altitude | 594 |
| Country | United States |
End: North Central Avenue (-104.156325, 47.716678)
Estimated Travel Time
Distance: 434 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 08h 59m |
| 40 mph (64.37 km/h) | 06h 44m |
| 50 mph (80.47 km/h) | 05h 23m |
| 60 mph (96.56 km/h) | 04h 29m |
| 70 mph (112.65 km/h) | 03h 51m |
| 80 mph (129 km/h) | 03h 21m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $37.06 | $74.12 |
| Mid-grade | $4.23 | $40.28 | $80.56 |
| Premium | $4.55 | $43.31 | $86.61 |
| Diesel | $5.41 | $51.52 | $103.04 |
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.