How far is Gillette, WY from Mills, WY?
The driving distance from Gillette, WY to Mills, WY is about 131.3 miles (211.3 km), with a travel time of about 02h 31m by car.
- The straight-line flight distance is about 109.2 miles (175.7 km).
- For a round trip, plan for roughly 05h 03m 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 02h 31m.
A morning start gives you useful time at the destination and keeps the return out of the late evening.
This departure sits inside the recommended comfort window for the route.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
Town in Natrona County, Wyoming, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Rain And Snow Showers Likely
Rain And Snow Showers Likely
Driving Route Map
The map below follows the saved road route between Gillette and Mills.
Turn-by-Turn Driving Directions
Step-by-step road directions between Gillette and Mills.
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1
Start on East 4th Street
2116 ft · 1 min · East 4th Street
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2
Turn right onto South Douglas Highway
5 mi · 10 min · South Douglas Highway
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3
Continue on State Highway 59 South
32.8 mi · 36 min · State Highway 59 South
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4
Turn right
51.3 mi · 59 min
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5
Turn left
18.1 mi · 21 min
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6
Take the exit left toward I 25 South: Casper
2173 ft · 53 sec
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7
Merge slight left
20.1 mi · 19 min
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8
Take the exit slight right toward US 20 West, US 26 West, WY 220 West: Shoshoni, Port of Entry
1757 ft · 43 sec
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9
Keep slight left
577 ft · 17 sec
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10
Turn right
1769 ft · 23 sec
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11
Take the exit slight right toward Salt Creek Road, Port of Entry
1581 ft · 44 sec
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12
Turn left onto Salt Creek Highway
1.5 mi · 3 min · Salt Creek Highway
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13
At the end of the road, turn left onto West Yellowstone Highway
75 m · 5 sec · West Yellowstone Highway
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14
Turn right onto Van Horn Avenue
1051 ft · 29 sec · Van Horn Avenue
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15
Continue on 1st Street
1654 ft · 46 sec · 1st Street
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16
Arrive at your destination
0 m · 1 sec · 1st Street
Car Route Details
A richer read on the saved driving route between Gillette and Mills.
Straightforward drive
The saved road route has a manageable number of maneuvers and should be easy to follow with normal attention to signs.
Longest stretch
Turn right
51.3 mi · 00h 59m
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.
Rain And Snow Showers Likely leaving Gillette and Rain And Snow Showers Likely near Mills.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Gillette to Mills?
The road trip is about 131.3 miles (211.3 km) and usually takes 02h 31m 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?
Edgerton is a useful midpoint, sitting about 65.6 miles from Gillette and 65.7 miles from Mills.
How much longer is the road route than the straight-line distance?
The direct path is about 109.2 miles (175.7 km), while the road route adds roughly 22.1 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 1:26 PM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $18.02 one way or $36.05 round trip. Estimated CO2 is about 41.1 kg one way.
What should you check before leaving?
Before you leave, expect Rain And Snow Showers Likely around Gillette and Rain And Snow Showers Likely near Mills.
Stop Ideas Near Edgerton
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 Edgerton.
Casper, Wyoming
Douglas, Wyoming
Flight Path Map
This map shows the direct air route between Gillette and Mills. Straight-line distance: 109.15 mi (175.66 km).
#1 Gillette
City in Campbell County, Wyoming, United States
| Population | 32,220 |
| Coordinates | 44.2910900, -105.5022200 |
| Altitude | 1388 |
| Country | United States |
#2 Mills
Town in Wyoming, United States
| Population | 4,077 |
| Coordinates | 42.8405200, -106.3658600 |
| Altitude | 1562 |
| Country | United States |
End: Mills (-106.36586, 42.84052)
Estimated Travel Time
Distance: 211 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 04h 22m |
| 40 mph (64.37 km/h) | 03h 16m |
| 50 mph (80.47 km/h) | 02h 37m |
| 60 mph (96.56 km/h) | 02h 11m |
| 70 mph (112.65 km/h) | 01h 52m |
| 80 mph (129 km/h) | 01h 38m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $18.02 | $36.05 |
| Mid-grade | $4.23 | $19.59 | $39.18 |
| Premium | $4.55 | $21.06 | $42.12 |
| Diesel | $5.41 | $25.06 | $50.12 |
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 Wyoming · 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.