How far is O'Fallon, IL from Naperville, IL?
The driving distance from O'Fallon, IL to Naperville, IL is about 277.8 miles (447.1 km), with a travel time of about 04h 18m by car.
- The straight-line flight distance is about 239.5 miles (385.4 km).
- For a round trip, plan for roughly 08h 37m 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 04h 18m.
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 Logan County, Illinois, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Mostly Sunny
Driving Route Map
The map below follows the saved road route between O'Fallon and Naperville.
Turn-by-Turn Driving Directions
Step-by-step road directions between O'Fallon and Naperville.
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1
Start on West State Street
1.5 km · 2 min · West State Street
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2
Enter the roundabout and take exit 2 toward West State Street
22 m · 3 sec · West State Street
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3
Exit the roundabout onto West State Street
998 ft · 28 sec · West State Street
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4
Turn right onto West Highway 50
2559 ft · 51 sec · West Highway 50
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5
Take the ramp slight right
2098 ft · 51 sec
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6
Merge slight left
1.8 mi · 2 min
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7
Take the exit slight right toward IL 159: Belleville, Collinsville
1536 ft · 29 sec
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8
Keep slight right to continue on Collinsville
67 m · 5 sec
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9
Turn straight onto North Illinois Street
3.8 mi · 6 min · North Illinois Street
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10
Continue on South Morrison Avenue
1.3 mi · 2 min · South Morrison Avenue
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11
Continue on Vandalia Street
2.8 mi · 5 min · Vandalia Street
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12
Take the ramp slight right toward I 55 North, I 70 East
2235 ft · 55 sec
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13
Merge slight left
3.8 mi · 4 min
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14
Keep slight left to continue on I 55 North, I 270 West: Chicago, Springfield, Kansas City
107.9 mi · 1 hr 57 min
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15
Keep slight right to continue on I 55 North: Chicago
29.4 mi · 31 min
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16
Keep slight left to continue on I 55 North, I 74 West: Chicago, Peoria
107.1 mi · 1 hr 56 min
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17
Take the exit slight right toward Weber Road
1556 ft · 44 sec
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18
Keep slight left
71 m · 8 sec
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19
Turn straight onto Weber Road
4.1 mi · 8 min · Weber Road
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20
Continue on Washington Street
2489 ft · 56 sec · Washington Street
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21
Continue on South Washington Street
5.3 mi · 12 min · South Washington Street
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22
Arrive at your destination
0 m · 1 sec · North Washington Street
Car Route Details
A richer read on the saved driving route between O'Fallon and Naperville.
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 North
Keep slight left to continue on I 55 North, I 270 West: Chicago, Springfield, Kansas City
108 mi · 01h 57m
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 O'Fallon and Mostly Sunny near Naperville.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from O'Fallon to Naperville?
The road trip is about 277.8 miles (447.1 km) and usually takes 04h 18m 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?
Atlanta is a useful midpoint, sitting about 135.4 miles from O'Fallon and 142.4 miles from Naperville.
How much longer is the road route than the straight-line distance?
The direct path is about 239.5 miles (385.4 km), while the road route adds roughly 38.3 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 8:22 AM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $36.96 one way or $73.91 round trip. Estimated CO2 is about 87.1 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around O'Fallon and Mostly Sunny near Naperville.
Stop Ideas Near Atlanta
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Route 66 Original Alignment- Driveable!
City of Lincoln
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Atlanta.
Lincoln
Uptown Station
Peoria, Illinois
Springfield station
Flight Path Map
This map shows the direct air route between O'Fallon and Naperville. Straight-line distance: 239.48 mi (385.4 km).
#1 O'Fallon
Township in St.
| Population | 29,606 |
| Coordinates | 38.5922700, -89.9112100 |
| Altitude | 167 |
| Country | United States |
#2 Naperville
The second most populous city in Illinois.
| Population | 147,986 |
| Coordinates | 41.7858600, -88.1472900 |
| Altitude | 216 |
| Country | United States |
End: North Washington Street (-88.147302, 41.785837)
Estimated Travel Time
Distance: 447 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 09h 15m |
| 40 mph (64.37 km/h) | 06h 56m |
| 50 mph (80.47 km/h) | 05h 33m |
| 60 mph (96.56 km/h) | 04h 37m |
| 70 mph (112.65 km/h) | 03h 58m |
| 80 mph (129 km/h) | 03h 27m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $36.96 | $73.91 |
| Mid-grade | $4.25 | $41.68 | $83.36 |
| Premium | $4.65 | $45.61 | $91.22 |
| Diesel | $5.30 | $51.98 | $103.96 |
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.