How far is Gillette, WY from Lyman, WY?
The driving distance from Gillette, WY to Lyman, WY is about 420.7 miles (677.1 km), with a travel time of about 07h 35m by car.
- The straight-line flight distance is about 317.5 miles (511 km).
- For a round trip, plan for roughly 15h 11m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 7:30 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 07h 35m.
Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
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 of the United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Slight Chance T-storms
Driving Route Map
The map below follows the saved road route between Gillette and Lyman.
Turn-by-Turn Driving Directions
Step-by-step road directions between Gillette and Lyman.
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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
2.7 mi · 3 min
-
11
Continue on Casper West Belt
7.3 mi · 9 min · Casper West Belt
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12
Turn right onto County Road 308
63.7 mi · 1 hr 12 min · County Road 308
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13
Continue straight
44.1 mi · 51 min
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14
Turn right onto West Spruce Street
1.5 mi · 2 min · West Spruce Street
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15
Take the ramp right
1 km · 1 min
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16
Merge slight left onto Dwight D. Eisenhower Highway
168.7 mi · 2 hr 44 min · Dwight D. Eisenhower Highway
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17
Take the exit slight right toward WY 413: Lyman
1964 ft · 53 sec
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18
Turn left
2.8 mi · 5 min
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19
At the end of the road, turn right onto North Main Street
1354 ft · 29 sec · North Main Street
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20
Turn left onto East Owen Street
3 m · 1 sec · East Owen Street
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21
Arrive at your destination
0 m · 1 sec · East Owen Street
Car Route Details
A richer read on the saved driving route between Gillette and Lyman.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
Dwight D. Eisenhower Highway
Merge slight left onto Dwight D. Eisenhower Highway
169 mi · 02h 44m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
Better with a longer stop
This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.
Mostly Sunny leaving Gillette and Slight Chance T-storms near Lyman.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Gillette to Lyman?
The road trip is about 420.7 miles (677.1 km) and usually takes 07h 35m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.
What is the halfway point on this route?
Bairoil is a useful midpoint, sitting about 210.1 miles from Gillette and 210.6 miles from Lyman.
How much longer is the road route than the straight-line distance?
The direct path is about 317.5 miles (511 km), while the road route adds roughly 103.2 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 6:00 AM to 7:30 AM MDT. Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $57.81 one way or $115.62 round trip. Estimated CO2 is about 132 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Gillette and Slight Chance T-storms near Lyman.
Flight Path Map
This map shows the direct air route between Gillette and Lyman. Straight-line distance: 317.55 mi (511.04 km).
#1 Gillette
City in Campbell County, Wyoming, United States
| Population | 32,220 |
| Coordinates | 44.2910900, -105.5022200 |
| Altitude | 1388 |
| Country | United States |
#2 Lyman
Town in Uinta County, Wyoming
| Population | 2,083 |
| Coordinates | 41.3274500, -110.2929300 |
| Altitude | 2044 |
| Country | United States |
End: Lyman (-110.29293, 41.32745)
Estimated Travel Time
Distance: 677 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 14h 01m |
| 40 mph (64.37 km/h) | 10h 31m |
| 50 mph (80.47 km/h) | 08h 24m |
| 60 mph (96.56 km/h) | 07h 00m |
| 70 mph (112.65 km/h) | 06h 00m |
| 80 mph (129 km/h) | 05h 14m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $57.81 | $115.62 |
| Mid-grade | $4.23 | $62.83 | $125.66 |
| Premium | $4.55 | $67.55 | $135.11 |
| Diesel | $5.41 | $80.37 | $160.74 |
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.