How far is Cicero, IL from O'Fallon, IL?
The driving distance from Cicero, IL to O'Fallon, IL is about 283.8 miles (456.8 km), with a travel time of about 05h 25m by car.
- The straight-line flight distance is about 251.9 miles (405.4 km).
- For a round trip, plan for roughly 10h 50m 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 05h 25m.
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.
Village in McLean County, Illinois, United States
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 Cicero and O'Fallon.
Turn-by-Turn Driving Directions
Step-by-step road directions between Cicero and O'Fallon.
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1
Start on South Laramie Avenue
1 km · 1 min · South Laramie Avenue
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2
Turn right onto West 31st Street
2687 ft · 1 min · West 31st Street
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3
Turn left onto South Central Avenue
1.7 mi · 3 min · South Central Avenue
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4
Take the ramp slight right toward I 55 South
2653 ft · 1 min
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5
Merge slight left onto Adlai Stevenson Expressway
127.8 mi · 2 hr 25 min · Adlai Stevenson Expressway
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6
Keep slight right to continue on I 55 South: Saint Louis, Springfield
64.8 mi · 1 hr 10 min
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7
Keep slight left to continue on I 55 South: Saint Louis
74.2 mi · 1 hr 20 min
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8
Take the exit slight right toward IL 162: Troy
1302 ft · 32 sec
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9
Keep slight left
141 m · 13 sec
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10
Turn straight onto Edwardsville Road
1.6 mi · 3 min · Edwardsville Road
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11
Turn right onto South Main Street
1.3 km · 1 min · South Main Street
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12
Continue on Troy Ofallon Road
4.2 mi · 7 min · Troy Ofallon Road
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13
Continue on Scott Troy Road
2.2 mi · 4 min · Scott Troy Road
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14
Turn right onto Ofallon Troy Road
1.9 mi · 3 min · Ofallon Troy Road
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15
Continue on O'Fallon Troy Road
120 m · 8 sec · O'Fallon Troy Road
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16
Continue on North Lincoln Avenue
2.5 mi · 4 min · North Lincoln Avenue
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17
Turn right onto West State Street
18 m · 1 sec · West State Street
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18
Arrive at your destination
0 m · 1 sec · West State Street
Car Route Details
A richer read on the saved driving route between Cicero 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.
Adlai Stevenson Expressway
Merge slight left onto Adlai Stevenson Expressway
128 mi · 02h 25m
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 Cicero 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 Cicero to O'Fallon?
The road trip is about 283.8 miles (456.8 km) and usually takes 05h 25m 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?
McLean is a useful midpoint, sitting about 142 miles from Cicero and 141.9 miles from O'Fallon.
How much longer is the road route than the straight-line distance?
The direct path is about 251.9 miles (405.4 km), while the road route adds roughly 31.9 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 6:00 AM to 8:00 AM CDT. If you want a more comfortable same-day return, try to leave by 6:10 AM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $37.79 one way or $75.57 round trip. Estimated CO2 is about 89 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Cicero and Sunny near O'Fallon.
Stop Ideas Near McLean
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Route 66 Original Alignment- Driveable!
City of Bloomington, Illinois
Bloomington Finance Department
City Hall - Town of Normal
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to McLean.
Lincoln
Uptown Station
Peoria, Illinois
Springfield station
Flight Path Map
This map shows the direct air route between Cicero and O'Fallon. Straight-line distance: 251.93 mi (405.44 km).
#1 Cicero
Town in Illinois
| Population | 79,727 |
| Coordinates | 41.8455900, -87.7539400 |
| Altitude | 184 |
| 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: 457 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 09h 27m |
| 40 mph (64.37 km/h) | 07h 05m |
| 50 mph (80.47 km/h) | 05h 40m |
| 60 mph (96.56 km/h) | 04h 43m |
| 70 mph (112.65 km/h) | 04h 03m |
| 80 mph (129 km/h) | 03h 32m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $37.79 | $75.57 |
| Mid-grade | $4.25 | $42.62 | $85.23 |
| Premium | $4.65 | $46.63 | $93.27 |
| Diesel | $5.30 | $53.15 | $106.29 |
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 · 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.