How far is O'Fallon, MO from Boonville, MO?
The driving distance from O'Fallon, MO to Boonville, MO is about 116 miles (186.7 km), with a travel time of about 02h 19m by car.
- The straight-line flight distance is about 110.5 miles (177.8 km).
- For a round trip, plan for roughly 04h 39m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 8:00 AM to 10:00 AM CDT.
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 02h 19m.
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 Missouri, USA
Route Weather Snapshot
Check the forecast at both ends before you head out.
Showers And Thunderstorms Likely
Chance Showers And Thunderstorms
Driving Route Map
The map below follows the saved road route between O'Fallon and Boonville.
Turn-by-Turn Driving Directions
Step-by-step road directions between O'Fallon and Boonville.
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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
111 mi · 2 hr 10 min
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8
Take the exit slight right toward I 70 Business, MO 87: Boonville, Prairie Home
941 ft · 23 sec
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9
Turn right
3.4 mi · 6 min
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10
At the end of the road, turn right onto Main Street
2672 ft · 2 min · Main Street
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11
Arrive at your destination
0 m · 1 sec · Main Street
Car Route Details
A richer read on the saved driving route between O'Fallon and Boonville.
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
111 mi · 02h 10m
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.
Showers And Thunderstorms Likely leaving O'Fallon and Chance Showers And Thunderstorms near Boonville.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from O'Fallon to Boonville?
The road trip is about 116 miles (186.7 km) and usually takes 02h 19m 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?
Auxvasse is a useful midpoint, sitting about 57.8 miles from O'Fallon and 58.1 miles from Boonville.
How much longer is the road route than the straight-line distance?
The direct path is about 110.5 miles (177.8 km), while the road route adds roughly 5.5 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 8:00 AM to 10:00 AM CDT. If you want a more comfortable same-day return, try to leave by 1:50 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $15.42 one way or $30.85 round trip. Estimated CO2 is about 36.3 kg one way.
What should you check before leaving?
Before you leave, expect Showers And Thunderstorms Likely around O'Fallon and Chance Showers And Thunderstorms near Boonville.
Stop Ideas Near Auxvasse
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 Auxvasse.
Hermann
Jefferson City
Washington
Quincy
Flight Path Map
This map shows the direct air route between O'Fallon and Boonville. Straight-line distance: 110.46 mi (177.77 km).
#1 O'Fallon
The most populous city in St.
| Population | 89,769 |
| Coordinates | 38.8106100, -90.6998500 |
| Altitude | 165 |
| Country | United States |
#2 Boonville
City in Cooper County, Missouri, USA
| Population | 7,878 |
| Coordinates | 38.9736400, -92.7432400 |
| Altitude | 204 |
| Country | United States |
End: Boonville (-92.74324, 38.97364)
Estimated Travel Time
Distance: 187 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 03h 51m |
| 40 mph (64.37 km/h) | 02h 53m |
| 50 mph (80.47 km/h) | 02h 19m |
| 60 mph (96.56 km/h) | 01h 55m |
| 70 mph (112.65 km/h) | 01h 39m |
| 80 mph (129 km/h) | 01h 26m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $15.42 | $30.85 |
| Mid-grade | $4.25 | $17.39 | $34.79 |
| Premium | $4.65 | $19.03 | $38.07 |
| Diesel | $5.30 | $21.69 | $43.39 |
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 15, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.