How far is Bellefontaine Neighbors, MO from O'Fallon, MO?
The driving distance from Bellefontaine Neighbors, MO to O'Fallon, MO is about 30.9 miles (49.8 km), with a travel time of about 00h 34m by car.
- The straight-line flight distance is about 26 miles (41.8 km).
- For a round trip, plan for roughly 01h 08m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 7:00 AM to 7:00 PM CDT.
Reverse, save, or send this route
This is an easy same-day return drive. Copy the route link, send it to another device, or print a clean version before you head out.
This is an easy same-day return drive.
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 00h 34m.
This is a short drive, so your comfort window is wide. Traffic and current weather matter more than the clock.
This departure sits inside the recommended comfort window for the route.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
City in St.
Route Weather Snapshot
Check the forecast at both ends before you head out.
Sunny
Driving Route Map
The map below follows the saved road route between Bellefontaine Neighbors and O'Fallon.
Turn-by-Turn Driving Directions
Step-by-step road directions between Bellefontaine Neighbors and O'Fallon.
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1
Start on the route
48 m · 13 sec
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2
Turn right onto Bellefontaine Road
2326 ft · 48 sec · Bellefontaine Road
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3
Turn right onto Saint Cyr Road
1.2 mi · 2 min · Saint Cyr Road
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4
Turn right onto Halls Ferry Road
2 mi · 3 min · Halls Ferry Road
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5
Keep slight left to continue on New Halls Ferry Road
1.1 km · 1 min · New Halls Ferry Road
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6
Turn left onto Dunn Road
1913 ft · 53 sec · Dunn Road
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7
Take the ramp straight toward I 270 West
1385 ft · 34 sec
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8
Merge slight left onto Rosemary Straub Davison Highway
8.6 mi · 11 min · Rosemary Straub Davison Highway
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9
Take the exit slight right toward I 70: Saint Louis, Kansas City
1492 ft · 26 sec
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10
Continue on I 70: Saint Louis, Kansas City
2478 ft · 43 sec
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11
Keep slight right to continue on I 70 West: Kansas City
2439 ft · 42 sec
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12
Merge slight left
13.6 mi · 17 min
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13
Take the exit slight right toward MO K: O'Fallon, Main Street
119 m · 8 sec
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14
Turn straight onto East Terra Lane
1.4 km · 2 min · East Terra Lane
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15
Turn right onto South Main Street
2830 ft · 1 min · South Main Street
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16
Turn right
8 m · 2 sec
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17
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Bellefontaine Neighbors and O'Fallon.
Turn-heavy local drive
The route has frequent decision points for its length, so lane choice and turn timing will matter more than cruising speed.
I 70 West
Merge slight left
13.6 mi · 00h 17m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A short regional drive
This route is short enough to handle as a quick errand, commute, or easy same-day return without much planning overhead.
Sunny leaving Bellefontaine Neighbors and Sunny near O'Fallon.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Bellefontaine Neighbors to O'Fallon?
The road trip is about 30.9 miles (49.8 km) and usually takes 00h 34m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route is short enough to handle as a quick errand, commute, or easy same-day return without much planning overhead.
What is the halfway point on this route?
Bridgeton is a useful midpoint, sitting about 14.9 miles from Bellefontaine Neighbors and 16.1 miles from O'Fallon.
How much longer is the road route than the straight-line distance?
The direct path is about 26 miles (41.8 km), while the road route adds roughly 4.9 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 7:00 AM to 7:00 PM CDT. If you want a more comfortable same-day return, try to leave by 7:22 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $4.11 one way or $8.22 round trip. Estimated CO2 is about 9.7 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Bellefontaine Neighbors and Sunny near O'Fallon.
Stop Ideas Near Bridgeton
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 Bridgeton.
Kirkwood
Gateway Transportation Center
Alton
Washington
Flight Path Map
This map shows the direct air route between Bellefontaine Neighbors and O'Fallon. Straight-line distance: 25.95 mi (41.77 km).
#1 Bellefontaine Neighbors
City in Saint Louis County, Missouri, United States
| Population | 10,297 |
| Coordinates | 38.7403300, -90.2265000 |
| Altitude | 140 |
| Country | United States |
#2 O'Fallon
The most populous city in St.
| Population | 89,769 |
| Coordinates | 38.8106100, -90.6998500 |
| Altitude | 165 |
| Country | United States |
End: (-90.699849, 38.810674)
Estimated Travel Time
Distance: 50 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 01m |
| 40 mph (64.37 km/h) | 00h 46m |
| 50 mph (80.47 km/h) | 00h 37m |
| 60 mph (96.56 km/h) | 00h 30m |
| 70 mph (112.65 km/h) | 00h 26m |
| 80 mph (129 km/h) | 00h 23m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $4.11 | $8.22 |
| Mid-grade | $4.25 | $4.64 | $9.27 |
| Premium | $4.65 | $5.07 | $10.15 |
| Diesel | $5.30 | $5.78 | $11.56 |
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 19, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.