How far is Mills, WY from Gillette, WY?
The driving distance from Mills, WY to Gillette, WY is about 126.4 miles (203.4 km), with a travel time of about 02h 11m by car.
- The straight-line flight distance is about 109.2 miles (175.7 km).
- For a round trip, plan for roughly 04h 22m 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 11m.
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 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 Mills and Gillette.
Turn-by-Turn Driving Directions
Step-by-step road directions between Mills and Gillette.
-
1
Start on 1st Street
1654 ft · 46 sec · 1st Street
-
2
Continue on Van Horn Avenue
1051 ft · 32 sec · Van Horn Avenue
-
3
Turn left onto West Yellowstone Highway
75 m · 9 sec · West Yellowstone Highway
-
4
Turn right onto Salt Creek Highway
1.3 mi · 2 min · Salt Creek Highway
-
5
Take the ramp right
2062 ft · 50 sec
-
6
Merge slight left
2894 ft · 49 sec
-
7
Turn left onto I 25 North, US 87 North: Midwest
1989 ft · 51 sec
-
8
Merge slight left
20.1 mi · 19 min
-
9
Take the exit slight right toward Horse Ranch Creek Road
1962 ft · 50 sec
-
10
Turn right onto Horseshoe Road
17.9 mi · 20 min · Horseshoe Road
-
11
Turn right
51.3 mi · 59 min
-
12
Turn left onto State Highway 59 South
32.8 mi · 36 min · State Highway 59 South
-
13
Continue on South Douglas Highway
5 mi · 10 min · South Douglas Highway
-
14
Turn left onto East 4th Street
2116 ft · 1 min · East 4th Street
-
15
Arrive at your destination
0 m · 1 sec · East 4th Street
Car Route Details
A richer read on the saved driving route between Mills and Gillette.
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 Mills and Rain And Snow Showers Likely near Gillette.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Mills to Gillette?
The road trip is about 126.4 miles (203.4 km) and usually takes 02h 11m 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 Mills and 60.8 miles from Gillette.
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 17.2 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 2:08 PM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $17.36 one way or $34.73 round trip. Estimated CO2 is about 39.6 kg one way.
What should you check before leaving?
Before you leave, expect Rain And Snow Showers Likely around Mills and Rain And Snow Showers Likely near Gillette.
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 Mills and Gillette. Straight-line distance: 109.15 mi (175.66 km).
#1 Mills
Town in Wyoming, United States
| Population | 4,077 |
| Coordinates | 42.8405200, -106.3658600 |
| Altitude | 1562 |
| Country | United States |
#2 Gillette
City in Campbell County, Wyoming, United States
| Population | 32,220 |
| Coordinates | 44.2910900, -105.5022200 |
| Altitude | 1388 |
| Country | United States |
End: East 4th Street (-105.502224, 44.291248)
Estimated Travel Time
Distance: 203 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 04h 12m |
| 40 mph (64.37 km/h) | 03h 09m |
| 50 mph (80.47 km/h) | 02h 31m |
| 60 mph (96.56 km/h) | 02h 06m |
| 70 mph (112.65 km/h) | 01h 48m |
| 80 mph (129 km/h) | 01h 34m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $17.36 | $34.73 |
| Mid-grade | $4.23 | $18.87 | $37.74 |
| Premium | $4.55 | $20.29 | $40.58 |
| Diesel | $5.41 | $24.14 | $48.28 |
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.