How far is Green River, WY from Buffalo, WY?
The driving distance from Green River, WY to Buffalo, WY is about 351.4 miles (565.5 km), with a travel time of about 06h 04m by car.
- The straight-line flight distance is about 239.8 miles (386 km).
- For a round trip, plan for roughly 12h 09m 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 06h 04m.
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
Driving Route Map
The map below follows the saved road route between Green River and Buffalo.
Turn-by-Turn Driving Directions
Step-by-step road directions between Green River and Buffalo.
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1
Start on North 1st East
11 m · 7 sec · North 1st East
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2
Turn left onto East Flaming Gorge Way
1.1 mi · 3 min · East Flaming Gorge Way
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3
Take the ramp straight toward I 80 East, US 30 East: Rock Springs
1.1 km · 1 min
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4
Merge slight left onto Dwight D. Eisenhower Highway
119.3 mi · 1 hr 56 min · Dwight D. Eisenhower Highway
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5
Take the exit slight right toward I 80 Business East, WY 789 North: Rawlins
1997 ft · 52 sec
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6
Turn left onto West Spruce Street
1.7 mi · 3 min · West Spruce Street
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7
Turn left onto 3rd Street
44.1 mi · 51 min · 3rd Street
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8
Continue straight
63.7 mi · 1 hr 13 min
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9
Turn left onto Casper West Belt
7.3 mi · 9 min · Casper West Belt
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10
Continue straight
3 mi · 4 min
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11
Turn left onto I 25 North, US 87 North: Midwest
1989 ft · 51 sec
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12
Merge slight left
108.2 mi · 1 hr 42 min
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13
Take the exit slight right toward I 25 Business, US 87 Business: Buffalo
1884 ft · 51 sec
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14
Turn left onto South Main Street
1.3 mi · 2 min · South Main Street
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15
Arrive at your destination
0 m · 1 sec · North Main Street
Car Route Details
A richer read on the saved driving route between Green River and Buffalo.
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
119 mi · 01h 56m
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.
Sunny leaving Green River and Mostly Sunny near Buffalo.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Green River to Buffalo?
The road trip is about 351.4 miles (565.5 km) and usually takes 06h 04m 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 175.5 miles from Green River and 175.8 miles from Buffalo.
How much longer is the road route than the straight-line distance?
The direct path is about 239.8 miles (386 km), while the road route adds roughly 111.6 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 $48.27 one way or $96.55 round trip. Estimated CO2 is about 110.2 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Green River and Mostly Sunny near Buffalo.
Flight Path Map
This map shows the direct air route between Green River and Buffalo. Straight-line distance: 239.86 mi (386.02 km).
#1 Green River
River in Wyoming, Utah, and Colorado, in the United States, that is a tributary of the Colorado River
| Population | 11,788 |
| Coordinates | 41.5285800, -109.4662500 |
| Altitude | 1864 |
| Country | United States |
#2 Buffalo
City in and county seat of Johnson County, Wyoming, United States
| Population | 4,659 |
| Coordinates | 44.3483100, -106.6989400 |
| Altitude | 1416 |
| Country | United States |
End: Buffalo (-106.69894, 44.34831)
Estimated Travel Time
Distance: 565 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 11h 42m |
| 40 mph (64.37 km/h) | 08h 47m |
| 50 mph (80.47 km/h) | 07h 01m |
| 60 mph (96.56 km/h) | 05h 51m |
| 70 mph (112.65 km/h) | 05h 01m |
| 80 mph (129 km/h) | 04h 23m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.89 | $48.27 | $96.55 |
| Mid-grade | $4.23 | $52.46 | $104.93 |
| Premium | $4.55 | $56.41 | $112.82 |
| Diesel | $5.41 | $67.11 | $134.22 |
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 18, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.