How far is Bloomington, IL from O'Fallon, IL?
The driving distance from Bloomington, IL to O'Fallon, IL is about 156.2 miles (251.3 km), with a travel time of about 03h 02m by car.
- The straight-line flight distance is about 139.6 miles (224.6 km).
- For a round trip, plan for roughly 06h 05m 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 02m.
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 Illinois, United States of America
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Partly Sunny
Driving Route Map
The map below follows the saved road route between Bloomington and O'Fallon.
Turn-by-Turn Driving Directions
Step-by-step road directions between Bloomington and O'Fallon.
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1
Start on North East Street
42 m · 6 sec · North East Street
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2
Continue on North Main Street
121 m · 17 sec · North Main Street
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3
Turn left onto West Chestnut Street
83 m · 19 sec · West Chestnut Street
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4
Turn left onto North Center Street
120 m · 13 sec · North Center Street
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5
Continue on North Madison Street
858 ft · 29 sec · North Madison Street
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6
Turn right onto West Market Street
2903 ft · 1 min · West Market Street
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7
Turn left onto North Morris Avenue
1.7 mi · 4 min · North Morris Avenue
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8
Turn right onto South Veterans Parkway
65.7 mi · 1 hr 12 min · South Veterans Parkway
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9
Keep slight left to continue on I 55 South: Saint Louis
74.2 mi · 1 hr 20 min
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10
Take the exit slight right toward IL 162: Troy
1302 ft · 32 sec
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11
Keep slight left
141 m · 13 sec
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12
Turn straight onto Edwardsville Road
1.6 mi · 3 min · Edwardsville Road
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13
Turn right onto South Main Street
1.3 km · 1 min · South Main Street
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14
Continue on Troy Ofallon Road
4.2 mi · 7 min · Troy Ofallon Road
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15
Continue on Scott Troy Road
2.2 mi · 4 min · Scott Troy Road
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16
Turn right onto Ofallon Troy Road
1.9 mi · 3 min · Ofallon Troy Road
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17
Continue on O'Fallon Troy Road
120 m · 8 sec · O'Fallon Troy Road
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18
Continue on North Lincoln Avenue
2.5 mi · 4 min · North Lincoln Avenue
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19
Turn right onto West State Street
18 m · 1 sec · West State Street
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20
Arrive at your destination
0 m · 1 sec · West State Street
Car Route Details
A richer read on the saved driving route between Bloomington and O'Fallon.
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 55 South
Keep slight left to continue on I 55 South: Saint Louis
74.2 mi · 01h 20m
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.
Mostly Sunny leaving Bloomington and Partly Sunny near O'Fallon.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Bloomington to O'Fallon?
The road trip is about 156.2 miles (251.3 km) and usually takes 03h 02m 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?
Divernon is a useful midpoint, sitting about 78.1 miles from Bloomington and 78 miles from O'Fallon.
How much longer is the road route than the straight-line distance?
The direct path is about 139.6 miles (224.6 km), while the road route adds roughly 16.6 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 8:00 AM CDT. If you want a more comfortable same-day return, try to leave by 10:54 AM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $20.78 one way or $41.56 round trip. Estimated CO2 is about 49 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Bloomington and Partly Sunny near O'Fallon.
Stop Ideas Near Divernon
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 Divernon.
Springfield station
Carlinville
Lincoln
Alton
Flight Path Map
This map shows the direct air route between Bloomington and O'Fallon. Straight-line distance: 139.56 mi (224.6 km).
#1 Bloomington
The second most populous city in McLean County, Illinois.
| Population | 77,132 |
| Coordinates | 40.4842000, -88.9936900 |
| Altitude | 243 |
| Country | United States |
#2 O'Fallon
Township in St.
| Population | 29,606 |
| Coordinates | 38.5922700, -89.9112100 |
| Altitude | 167 |
| Country | United States |
End: O'Fallon (-89.91121, 38.59227)
Estimated Travel Time
Distance: 251 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 05h 12m |
| 40 mph (64.37 km/h) | 03h 54m |
| 50 mph (80.47 km/h) | 03h 07m |
| 60 mph (96.56 km/h) | 02h 36m |
| 70 mph (112.65 km/h) | 02h 13m |
| 80 mph (129 km/h) | 01h 56m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $20.78 | $41.56 |
| Mid-grade | $4.25 | $23.43 | $46.87 |
| Premium | $4.65 | $25.64 | $51.29 |
| Diesel | $5.30 | $29.23 | $58.45 |
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 Illinois · May 30, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.