How far is Casper, WY from Afton, WY?
The driving distance from Casper, WY to Afton, WY is about 356.4 miles (573.5 km), with a travel time of about 07h 15m by car.
- The straight-line flight distance is about 234.3 miles (377.1 km).
- For a round trip, plan for roughly 14h 30m 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 15m.
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 then Chance Showers And Thunderstorms
Rain And Snow
Driving Route Map
The map below follows the saved road route between Casper and Afton.
Turn-by-Turn Driving Directions
Step-by-step road directions between Casper and Afton.
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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
Turn right onto East F Street
967 ft · 16 sec · East F Street
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6
Take the ramp straight
2.1 mi · 3 min
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7
Take the exit slight right toward US 20 West, US 26 West, WY 220 West: Shoshoni, Port of Entry
1846 ft · 45 sec
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8
Keep slight left
107 m · 11 sec
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9
Turn left
3 mi · 4 min
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10
Turn right onto West Yellowstone Highway
94.3 mi · 1 hr 47 min · West Yellowstone Highway
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11
Continue straight
17.7 mi · 20 min
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12
Continue straight
4 mi · 5 min
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13
Turn right onto East Main Street
77.9 mi · 1 hr 28 min · East Main Street
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14
Turn left onto East Ramshorn Street
2.2 mi · 3 min · East Ramshorn Street
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15
Continue on US 26 / US 287
53.2 mi · 1 hr · US 26 / US 287
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16
Continue on North Highway 89
23.3 mi · 32 min · North Highway 89
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17
Enter the roundabout and take exit 2 toward North Highway 89
30 m · 6 sec · North Highway 89
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18
Exit the roundabout onto North Highway 89
6 mi · 9 min · North Highway 89
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19
Continue on North Cache Street
1.4 km · 3 min · North Cache Street
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20
Continue on South Cache Drive
120 m · 12 sec · South Cache Drive
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21
Turn right onto West Pearl Avenue
2015 ft · 46 sec · West Pearl Avenue
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22
At the end of the road, turn left onto West Broadway Avenue
1 mi · 3 min · West Broadway Avenue
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23
Continue on South Highway 89
11.8 mi · 17 min · South Highway 89
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24
Enter the roundabout and take exit 1 toward the route
19 m · 2 sec
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25
Exit the roundabout
22.8 mi · 32 min
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26
Turn left onto US Highway 89
2494 ft · 56 sec · US Highway 89
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27
Continue on Main Street
17 mi · 21 min · Main Street
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28
Continue on North Main Street
13.8 mi · 18 min · North Main Street
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29
Continue on North Washington Street
1.8 mi · 4 min · North Washington Street
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30
Turn left onto East 4th Avenue
135 m · 21 sec · East 4th Avenue
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31
Turn right
33 m · 8 sec
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32
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Casper and Afton.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
West Yellowstone Highway
Turn right onto West Yellowstone Highway
94.3 mi · 01h 47m
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 then Chance Showers And Thunderstorms leaving Casper and Rain And Snow near Afton.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Casper to Afton?
The road trip is about 356.4 miles (573.5 km) and usually takes 07h 15m 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?
Dubois is a useful midpoint, sitting about 178 miles from Casper and 178.4 miles from Afton.
How much longer is the road route than the straight-line distance?
The direct path is about 234.3 miles (377.1 km), while the road route adds roughly 122.1 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 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 $48.94 one way or $97.87 round trip. Estimated CO2 is about 111.7 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny then Chance Showers And Thunderstorms around Casper and Rain And Snow near Afton.
Flight Path Map
This map shows the direct air route between Casper and Afton. Straight-line distance: 234.34 mi (377.14 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 Afton
Town in Wyoming, United States
| Population | 2,071 |
| Coordinates | 42.7249300, -110.9318700 |
| Altitude | 1902 |
| Country | United States |
End: Afton (-110.93187, 42.72493)
Estimated Travel Time
Distance: 574 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 11h 52m |
| 40 mph (64.37 km/h) | 08h 54m |
| 50 mph (80.47 km/h) | 07h 07m |
| 60 mph (96.56 km/h) | 05h 56m |
| 70 mph (112.65 km/h) | 05h 05m |
| 80 mph (129 km/h) | 04h 26m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $48.94 | $97.87 |
| Mid-grade | $4.23 | $53.18 | $106.37 |
| Premium | $4.55 | $57.18 | $114.36 |
| Diesel | $5.41 | $68.03 | $136.06 |
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.