How far is Casper, WY from Guernsey, WY?
The driving distance from Casper, WY to Guernsey, WY is about 111.8 miles (180 km), with a travel time of about 01h 59m by car.
- The straight-line flight distance is about 90 miles (144.8 km).
- For a round trip, plan for roughly 03h 59m 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 01h 59m.
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.
City in Converse County, Wyoming, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny then Chance Showers And Thunderstorms
Mostly Cloudy then Chance Rain Showers
Driving Route Map
The map below follows the saved road route between Casper and Guernsey.
Turn-by-Turn Driving Directions
Step-by-step road directions between Casper and Guernsey.
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1
Start on North Sunlight Drive
1368 ft · 1 min · North Sunlight Drive
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2
Turn right
770 ft · 34 sec
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3
Turn right onto East Sunlight Drive
2655 ft · 2 min · East Sunlight Drive
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4
At the end of the road, turn right onto Bryan Stock Trail
1.1 mi · 2 min · Bryan Stock Trail
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5
Continue on North Beverly Street
1150 ft · 30 sec · North Beverly Street
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6
Turn left onto East Yellowstone Highway
1535 ft · 26 sec · East Yellowstone Highway
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7
Take the ramp straight toward I 25 South: Douglas
1542 ft · 38 sec
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8
Merge slight left
93.5 mi · 1 hr 34 min
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9
Take the exit slight left toward Guernsey, Torrington
15.6 mi · 19 min
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10
Turn right onto South Wyoming Avenue
17 m · 1 sec · South Wyoming Avenue
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11
Arrive at your destination
0 m · 1 sec · South Wyoming Avenue
Car Route Details
A richer read on the saved driving route between Casper and Guernsey.
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 25 South
Merge slight left
93.5 mi · 01h 34m
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 then Chance Showers And Thunderstorms leaving Casper and Mostly Cloudy then Chance Rain Showers near Guernsey.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Casper to Guernsey?
The road trip is about 111.8 miles (180 km) and usually takes 01h 59m 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?
Douglas is a useful midpoint, sitting about 55.9 miles from Casper and 56 miles from Guernsey.
How much longer is the road route than the straight-line distance?
The direct path is about 90 miles (144.8 km), while the road route adds roughly 21.8 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 2:30 PM MDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $15.38 one way or $30.75 round trip. Estimated CO2 is about 35.1 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny then Chance Showers And Thunderstorms around Casper and Mostly Cloudy then Chance Rain Showers near Guernsey.
Stop Ideas Near Douglas
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Douglas City Hall Historic
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Douglas.
Douglas, Wyoming
Casper, Wyoming
Wheatland, Wyoming
Flight Path Map
This map shows the direct air route between Casper and Guernsey. Straight-line distance: 89.97 mi (144.8 km).
#1 Casper
The most populous city in Natrona County, Wyoming.
| Population | 58,498 |
| Coordinates | 42.8666300, -106.3130800 |
| Altitude | 1560 |
| Country | United States |
#2 Guernsey
Town in Platte County, Wyoming, United States of America
| Population | 1,143 |
| Coordinates | 42.2696900, -104.7416300 |
| Altitude | 1327 |
| Country | United States |
End: Guernsey (-104.74163, 42.26969)
Estimated Travel Time
Distance: 180 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 03h 43m |
| 40 mph (64.37 km/h) | 02h 47m |
| 50 mph (80.47 km/h) | 02h 14m |
| 60 mph (96.56 km/h) | 01h 51m |
| 70 mph (112.65 km/h) | 01h 35m |
| 80 mph (129 km/h) | 01h 23m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $15.38 | $30.75 |
| Mid-grade | $4.23 | $16.71 | $33.42 |
| Premium | $4.55 | $17.97 | $35.94 |
| Diesel | $5.41 | $21.38 | $42.75 |
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 16, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.