O'Fallon, IL to Naperville, IL is 270.7 miles and takes about 5h 10m via I 55 and South Washington Street, with a fuel budget near $41 and enough daylight to finish in a day. This trip stays within the Midwest, specifically within Illinois, making it a straightforward drive without major geographic shifts. The route is predominantly highway, so expect a consistent pace for most of your travel time. Given its manageable length and single day recommendation, this is a solid option if you're looking for an efficient way to get from point A to point B within the state.
Trip Pace
Same-day drive is realistic
A same-day return is possible, but it will make for a full day on the road.
Break Rhythm
1 planned break
Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
Midpoint
135.3 miles from O'Fallon, IL
A natural place for your longest stop of the day
, about 2h 32m into the drive
.
Main Roads
Road
Distance
Duration
I 55
248.1 mi
4h 28m
South Washington Street
5.3 mi
11m
Weber Road
4.1 mi
7m
North Illinois Street
3.8 mi
5m
Vandalia Street
2.8 mi
4m
I 64
1.8 mi
2m
South Morrison Avenue
1.3 mi
1m
West State Street
1.2 mi
2m
Longest stretch:
I 55
— 248.1 mi, about 4h 28m
Traffic on I-55
Hour-of-day weekday pattern from 28 FHWA count stations on your route.
Peak
4 PM
~1,633 veh/hr typical
· worst 2,039
Quietest
2 AM
~154 veh/hr
Peak-to-quiet ratio
10.6×
busier at peak than in the quiet hours
12a6anoon6p11p
Averaged across 52 weeks of 2023 FHWA Travel Monitoring Analysis System data. Weekday hours only (Mon–Fri).
Turn-by-Turn Driving Directions
Step-by-step road directions between O'Fallon, IL and Naperville, IL.
1
Start on West State Street
1.0 mi·2 min·West State Street
2
Enter roundabout onto West State Street
72 ft·3 sec·West State Street
3
Continue on West State Street
0.2 mi·27 sec·West State Street
4
Turn right onto West Highway 50
0.5 mi·51 sec·West Highway 50
5
Take the ramp
0.4 mi·51 sec
6
Merge onto I 64; US 50
1.8 mi·2 min·I 64; US 50
7
Take the exit
0.3 mi·28 sec
Exit 12Toward IL 159: Belleville, CollinsvilleUse the straight / slight right lanes.
8
Keep slight right at fork
220 ft·5 sec
Toward CollinsvilleUse the right lane.
9
Turn straight onto IL 159
3.8 mi·5 min·North Illinois Street
10
Continue on IL 159
1.3 mi·1 min·South Morrison Avenue
11
Continue on IL 159
2.8 mi·4 min·Vandalia Street
12
Take the ramp
0.4 mi·54 sec
Toward I 55 North, I 70 East
13
Merge onto I 55; I 70; US 40
3.8 mi·4 min·I 55; I 70; US 40
14
Keep slight left at fork onto I 55
108 mi·1 hr 56 min·I 55
Toward I 55 North, I 270 West: Chicago, Springfield, Kansas City
15
Keep slight right at fork onto I 55
29 mi·31 min·I 55
Toward I 55 North: ChicagoUse the straight / slight right lanes.
16
Keep slight left at fork onto I 55
107 mi·1 hr 56 min·I 55
Toward I 55 North, I 74 West: Chicago, PeoriaUse the straight / slight right lanes.
17
Take the exit
0.3 mi·43 sec
Exit 263Toward Weber RoadUse the straight / slight right lanes.
18
Keep slight left at fork
233 ft·7 sec
Use the left lane.
19
Turn straight onto CH 88
4.1 mi·7 min·Weber Road
Use the left lane.
20
Continue on Washington Street
0.5 mi·55 sec·Washington Street
Use the left lane.
21
Continue on South Washington Street
5.3 mi·11 min·South Washington Street
Use the left lane.
22
Arrive at destination
North Washington Street
Trip Plan
With a total drive time of just over 5 hours, leaving in the morning should give you plenty of daylight to reach Naperville. The single recommended stop is likely sufficient, but you can adjust based on your personal needs; the longest stretch is 248.1 miles on I 55, so a break around that mark might be ideal. Keep an eye on your fuel as you get closer to Naperville, as the estimated cost is $41. Since this is a one-day trip, you have flexibility to depart a bit later if needed, but aim to hit the highway before peak commuter times if possible.
Morning Departure
An early start around 7-8 AM gets you there with plenty of daylight left.
Evening Departure
A late afternoon start means arriving after dark. Morning is better.
You can normally do this drive in one day.
Plan roughly 1 meaningful break for fuel, food, and rest.
The halfway point lands around 135.3 miles from O'Fallon, IL, or about 2h 32m into the drive.
The longest continuous stretch on this route runs about 248.1 miles.
This is a comfortable same-day trip.
Departure
Before you leave
Start with fuel, water, and navigation already sorted so the first hour feels easy.
First stop
Around 60 miles or 1h 11m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 135.3 miles or 2h 32m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 4h 6m
Traffic, exits, and arrival timing usually matter more near Naperville, IL than in the middle of the route.
Before You Leave
+
Open the route before leaving O'Fallon, IL so your first major turns are already loaded.
+
Leave with enough water and a charging cable within reach, not packed away.
+
Check your fuel range against the first long segment, especially if you are starting outside city service areas.
Day 1
Settle into the route from O'Fallon, IL
This is one driving day of about 270.7 miles and 5h 10m.
Your first comfortable stop window is around 60 miles from O'Fallon, IL.
This route can stay practical as a one-day drive if traffic stays reasonable.
Plan about 1 real break rather than only quick fuel stops.
The longest stretch is on I 55 for about 248.1 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Place data sourced from public business listings. Hours and availability may vary.
Heads-up: tricky spots
5 of 15
5 decision points cluster between mile 3.8 and 260.5 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
8
3.8 mi into trip|~6m in
Take the exit toward IL 159: Belleville, Collinsville
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / slight right lanes.
Exit 12
Toward IL 159: Belleville, Collinsville
8
4.1 mi into trip|~6m in
Keep slight right at fork toward Collinsville
Highway fork - watch signs carefully. Lane positioning matters here
Use the right lane.
Toward Collinsville
7
124.1 mi into trip|~2h 20m in|I 55
Keep slight right at fork onto I 55 toward I 55 North: Chicago
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight right lanes.
Toward I 55 North: Chicago
8
153.4 mi into trip|~2h 52m in|I 55
Keep slight left at fork onto I 55 toward I 55 North, I 74 West: Chicago, Peoria
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the straight / slight right lanes.
Toward I 55 North, I 74 West: Chicago, Peoria
7
260.5 mi into trip|~4h 48m in
Take the exit toward Weber Road
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the straight / slight right lanes.
Exit 263
Toward Weber Road
Fuel & Cost
Regular Gas
$39.98 one way
$79.95 round trip
$3.75/gal25.4 MPG avg95 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.14
$44.13
$88.27
premium
$4.72
$50.26
$100.52
diesel
$4.80
$51.11
$102.23
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$40
Meals
$25–$50
Total
$65–$90
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 94.7 kg one way.
Prices: EIA weekly data, 2026-07-13.
Driving Electric?
About $28 in charging
· 1 stop
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
81.2
1
$28.42
$12.99
Efficient EV
67.7
0
$23.69
$10.83
EV Truck/SUV
108.3
1
$37.90
$17.32
Gas CO2
95 kg
EV CO2
32 kg (66% less)
Plan for 1 charging stop. A 30-minute DC fast charge mid-route should be enough to complete the trip comfortably.
DC fast charging avg $0.35/kWh. Home charging avg $0.16/kWh. US grid CO2: 0.39 kg/kWh.
Travel Intel
Current conditions at both ends of the drive.
Forecast as of Jul 18, 2026
Origin
O'Fallon, IL
Late night
in O'Fallon on Monday
Local time
5:15 AM
CDT
Current temp
75°F
Mostly Clear
W 5 mph3% chanceLive forecast
Flood Warning
Flood Warning issued July 17 at 9:11PM CDT until July 18 at 1:00PM CDT by NWS Lincoln IL
Flood Warning
Flood Warning issued July 17 at 9:11PM CDT until July 19 at 7:00AM CDT by NWS Lincoln IL
Destination
Naperville, IL
Late night
in Naperville on Monday
Local time
5:15 AM
CDT
Current temp
74°F
Mostly Clear
SW 5 to 10 mph7% chanceLive forecast
Flood Warning
Flood Warning issued July 17 at 9:11PM CDT until July 18 at 1:00PM CDT by NWS Lincoln IL
Flood Warning
Flood Warning issued July 17 at 9:11PM CDT until July 19 at 7:00AM CDT by NWS Lincoln IL
85°F
Bloomington, IL
135 mi in
Seasonal Notes
Summer travel usually means heavier construction, hotter rest stops, and busier weekend traffic around major cities.
Winter travel shortens daylight, so a route that looks manageable on paper can feel much longer after dark.
Holiday weekends tend to make both departure and arrival windows slower than the raw route time suggests.
Time zone
Same local time
Origin and destination are on the same clock, so arrival timing is easier to judge at a glance.
Temperature spread
1 degrees cooler at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
5h 10m on the road
An early start around 7-8 AM gets you there with plenty of daylight left.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
National Parks Near This Route
Worth a detour if your schedule allows.
Springfield 1908 Race Riot National Monument
National Monument
In August 1908, a large White mob attacked the Black community in Springfield, Illinois. Rioters destroyed homes and businesses and lynched two men. The event led to the founding of the National Assoc...
In a growing Chicago neighborhood, diverse people and stories intertwined. All were seeking opportunity. Some succeeded. Others were limited—by race, gender, or economic status. Their stories came tog...
27 mi from route
~67 min detour
Free
near mile 261.4
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
This drive is 93% highway, with the longest continuous stretch on I 55 covering 248.1 miles. You'll transition from highway cruising to surface streets, specifically Weber Road and South Washington Street, as you approach your destination. Expect a high volume of exits on I 55 for a good portion of the trip. The final segment will involve navigating more local traffic patterns.
93% highway — fuel and pacing are the main things to plan.
22 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 248.1 mi on I 55.
How Hard Is This Drive?
8/10
This is a straightforward highway drive that stays mostly on I 55 and South Washington Street. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 3.8 miles in.
Driving Effort8/10
Demanding - plan breaks and stay ahead of the key maneuvers
Balances navigation complexity with total wheel time.
This is a demanding drive. With 15 significant decision points across 270.7 miles, you will need to stay alert - especially through interchange areas and urban stretches. Consider splitting it into segments if you are not comfortable with fast highway navigation.
Where does it get tricky?
The main spots that need attention: at 3.8 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 4.1 miles: Highway fork - watch signs carefully. Lane positioning matters here; at 124.1 miles (I 55): Highway fork - watch signs carefully. Lane positioning matters here.
Elevation Profile
Mostly flat terrain
822 ft552 ft
Total Climb
490 ft
Total Descent
332 ft
Highest Point
822 ft
~154.7 mi in
Elevation Range
270 ft
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between O'Fallon, IL and Naperville, IL, road signs point toward Springfield, Kansas City and Peoria.
Naperville is a bedroom community in the Chicagoland area. In 2008, Money magazine ranked Naperville third on its list of the 100 best places to live in the United States.
Doable as a same-day drive at 5h 10m. Total distance: 270.7 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
5h 10m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (93%). Some complex stretches to watch for.
Frequently Asked Questions
The longest stretch is about 248.1 miles on I 55. The full list of main roads is in the Roads section above.
Yes — we found about 28 rest areas or service plazas within a short detour of the route (from OpenStreetMap). See the Rest Stops tab under Nearby Places for locations and mile markers. Plan to stretch, use the bathroom, and top off fluids every 2–3 hours on longer drives.
It helps. This route has a higher-than-average number of complex decision points, which get harder in the dark. If the last hour of the trip is on surface roads or mountain grades, aim to arrive at Naperville, IL before sunset when you can. Check the Trip Plan for departure windows that land you in daylight.
Only with planning. This is a long drive for kids — consider splitting it into two days rather than pushing through. Plan at least 1 meaningful breaks. There are 28 rest areas along the route for bathroom stops.
The main spots that need attention: at 3.8 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 4.1 miles: Highway fork - watch signs carefully. Lane positioning matters here; at 124.1 miles (I 55): Highway fork - watch signs carefully. Lane positioning matters here.
Yes — Springfield 1908 Race Riot National Monument and Pullman National Historical Park. See the National Parks section for detour distances and tips on detours.
Not recommended in a single day. At 5.2 hours each way, a round trip means 10.3 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at Naperville, IL before the return drive.
