How far is Billings, MT from Roundup, MT?
The driving distance from Billings, MT to Roundup, MT is about 49.5 miles (79.6 km), with a travel time of about 00h 57m by car.
- The straight-line flight distance is about 45.8 miles (73.7 km).
- For a round trip, plan for roughly 01h 55m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 8:00 AM to 10:00 AM MDT.
Reverse, save, or send this route
This route works well as a day trip with time at the destination. Copy the route link, send it to another device, or print a clean version before you head out.
This route works well as a day trip with time at the destination.
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 00h 57m.
A morning start gives you useful time at the destination and keeps the return out of the late evening.
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 Montana, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Sunny
Driving Route Map
The map below follows the saved road route between Billings and Roundup.
Turn-by-Turn Driving Directions
Step-by-step road directions between Billings and Roundup.
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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
123 m · 9 sec · 1st Avenue North
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5
Continue on Main Street
3.5 mi · 6 min · Main Street
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6
Turn slight left onto Roundup Road
44.4 mi · 49 min · Roundup Road
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7
Turn left onto Main Street
1245 ft · 21 sec · Main Street
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8
Arrive at your destination
0 m · 1 sec · Main Street
Car Route Details
A richer read on the saved driving route between Billings and Roundup.
Straightforward drive
The saved road route has a manageable number of maneuvers and should be easy to follow with normal attention to signs.
Roundup Road
Turn slight left onto Roundup Road
44.4 mi · 00h 49m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A comfortable day-trip route
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
Mostly Sunny leaving Billings and Sunny near Roundup.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Billings to Roundup?
The road trip is about 49.5 miles (79.6 km) and usually takes 00h 57m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
What is the halfway point on this route?
Broadview is a useful midpoint, sitting about 24.7 miles from Billings and 24.7 miles from Roundup.
How much longer is the road route than the straight-line distance?
The direct path is about 45.8 miles (73.7 km), while the road route adds roughly 3.7 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 8:00 AM to 10:00 AM MDT. If you want a more comfortable same-day return, try to leave by 4:34 PM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $6.81 one way or $13.63 round trip. Estimated CO2 is about 15.6 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Billings and Sunny near Roundup.
Stop Ideas Near Broadview
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 Broadview.
Billings, MT
Flight Path Map
This map shows the direct air route between Billings and Roundup. Straight-line distance: 45.78 mi (73.67 km).
#1 Billings
The most populous city in Montana.
| Population | 117,445 |
| Coordinates | 45.7832900, -108.5006900 |
| Altitude | 952 |
| Country | United States |
#2 Roundup
City in Musselshell County, Montana, United States
| Population | 1,864 |
| Coordinates | 46.4452400, -108.5418000 |
| Altitude | 980 |
| Country | United States |
End: Roundup (-108.5418, 46.44524)
Estimated Travel Time
Distance: 80 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 38m |
| 40 mph (64.37 km/h) | 01h 14m |
| 50 mph (80.47 km/h) | 00h 59m |
| 60 mph (96.56 km/h) | 00h 49m |
| 70 mph (112.65 km/h) | 00h 42m |
| 80 mph (129 km/h) | 00h 37m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $6.81 | $13.63 |
| Mid-grade | $4.23 | $7.40 | $14.81 |
| Premium | $4.55 | $7.96 | $15.92 |
| Diesel | $5.41 | $9.47 | $18.94 |
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 18, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.