How far is O'Fallon, MO from Buckner, MO?
The driving distance from O'Fallon, MO to Buckner, MO is about 201.8 miles (324.8 km), with a travel time of about 03h 53m by car.
- The straight-line flight distance is about 189.3 miles (304.6 km).
- For a round trip, plan for roughly 07h 46m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 8:00 AM CDT.
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 03h 53m.
An early departure helps you fit a real stop into the day without turning the return into a late-night drive.
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 Missouri, 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 O'Fallon and Buckner.
Turn-by-Turn Driving Directions
Step-by-step road directions between O'Fallon and Buckner.
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1
Start on the route
8 m · 7 sec
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2
Turn left onto South Main Street
3116 ft · 2 min · South Main Street
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3
Turn left onto I 70 East
10 m · 6 sec
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4
Turn sharp left onto South Main Street
87 m · 11 sec · South Main Street
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5
Turn left onto West Terra Lane
576 ft · 12 sec · West Terra Lane
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6
Take the ramp straight toward I 70 West
146 m · 7 sec
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7
Merge slight left
193 mi · 3 hr 37 min
-
8
Take the exit slight right toward MO AA, US 40, MO BB: Grain Valley, Buckner
1126 ft · 35 sec
-
9
Turn right onto North Main Street
1449 ft · 39 sec · North Main Street
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10
Continue on South Buckner Tarsney Road
6.7 mi · 10 min · South Buckner Tarsney Road
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11
Continue on South Sibley Street
1.2 km · 2 min · South Sibley Street
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12
Turn left onto Washington Street
105 m · 15 sec · Washington Street
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13
Arrive at your destination
0 m · 1 sec · Washington Street
Car Route Details
A richer read on the saved driving route between O'Fallon and Buckner.
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 70 West
Merge slight left
193 mi · 03h 37m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A longer out-and-back drive
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
Sunny leaving O'Fallon and Mostly Sunny near Buckner.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from O'Fallon to Buckner?
The road trip is about 201.8 miles (324.8 km) and usually takes 03h 53m in normal driving conditions.
Is this a same-day trip or an overnight route?
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
What is the halfway point on this route?
Rocheport is a useful midpoint, sitting about 100.7 miles from O'Fallon and 101.1 miles from Buckner.
How much longer is the road route than the straight-line distance?
The direct path is about 189.3 miles (304.6 km), while the road route adds roughly 12.5 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 8:00 AM CDT. If you want a more comfortable same-day return, try to leave by 9:14 AM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $26.85 one way or $53.70 round trip. Estimated CO2 is about 63.3 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around O'Fallon and Mostly Sunny near Buckner.
Stop Ideas Near Rocheport
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 Rocheport.
Jefferson City
Sedalia
Hermann
Warrensburg
Flight Path Map
This map shows the direct air route between O'Fallon and Buckner. Straight-line distance: 189.24 mi (304.55 km).
#1 O'Fallon
The most populous city in St.
| Population | 89,769 |
| Coordinates | 38.8106100, -90.6998500 |
| Altitude | 165 |
| Country | United States |
#2 Buckner
City in Jackson County, Missouri, United States
| Population | 3,010 |
| Coordinates | 39.1325100, -94.1985600 |
| Altitude | 229 |
| Country | United States |
End: Buckner (-94.19856, 39.13251)
Estimated Travel Time
Distance: 325 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 06h 43m |
| 40 mph (64.37 km/h) | 05h 02m |
| 50 mph (80.47 km/h) | 04h 02m |
| 60 mph (96.56 km/h) | 03h 21m |
| 70 mph (112.65 km/h) | 02h 53m |
| 80 mph (129 km/h) | 02h 31m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $26.85 | $53.70 |
| Mid-grade | $4.25 | $30.28 | $60.56 |
| Premium | $4.65 | $33.14 | $66.27 |
| Diesel | $5.30 | $37.76 | $75.53 |
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 Missouri · 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.