Niles, IL to O'Fallon, IL is 295.1 miles and takes about 5h 40m via I 55 and Tri-State Tollway, with a fuel budget near $46 and enough daylight to finish in a day. This trip stays within Illinois, traveling from the Midwest region to the Midwest region. The route is primarily highway driving, making it a straightforward option for a single-day trip. You'll spend most of your time on major interstates, so expect consistent speed limits and well-maintained roads. It's a good choice if you're looking for an efficient way to cover ground between these two points.
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
147.6 miles from Niles, IL
A natural place for your longest stop of the day
, about 2h 52m into the drive
.
Main Roads
Road
Distance
Duration
I 55
139 mi
2h 29m
Adlai Stevenson Expressway
119.4 mi
2h 13m
Tri-State Tollway
17.5 mi
22m
Troy Ofallon Road
4.2 mi
7m
West Touhy Avenue
3.5 mi
6m
North Lincoln Avenue
2.5 mi
4m
Scott Troy Road
2.2 mi
3m
Ofallon Troy Road
1.9 mi
3m
Longest stretch:
I 55
— 139 mi, about 2h 29m
Traffic on I-55
Hour-of-day weekday pattern from 28 FHWA count stations on your route.
Peak
4 PM
~1,681 veh/hr typical
· worst 2,233
Quietest
2 AM
~156 veh/hr
Peak-to-quiet ratio
10.8×
busier at peak than in the quiet hours
12a6anoon6p11p
Averaged across 103 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 Niles, IL and O'Fallon, IL.
1
Start on North Waukegan Road
0.4 mi·44 sec·North Waukegan Road
2
Continue on North Milwaukee Avenue
507 ft·17 sec·North Milwaukee Avenue
3
Turn right onto West Touhy Avenue
3.5 mi·6 min·West Touhy Avenue
Use the right lane.
4
Turn left onto South Des Plaines River Road
184 ft·3 sec·South Des Plaines River Road
5
Take the ramp
0.4 mi·55 sec
Toward I 294 South: Indiana
6
Merge onto I 294
11 mi·14 min·Tri-State Tollway
Use the straight / slight right lanes.
7
Keep slight left at fork onto I 294
4.8 mi·5 min·Tri-State Tollway
8
Keep slight right at fork onto I 294
1.2 mi·1 min·Tri-State Tollway
Use the straight / slight right lanes.
9
Take the exit
0.6 mi·1 min
Exit 23Toward I 55: Chicago, St. Louis
10
Keep slight right at fork
0.4 mi·56 sec
Toward I 55 South: Saint LouisUse the slight right lane.
11
Merge onto I 55
119 mi·2 hr 13 min·Adlai Stevenson Expressway
Use the straight / slight right lanes.
12
Keep slight right at fork onto I 55
65 mi·1 hr 10 min·I 55
Toward I 55 South: Saint Louis, SpringfieldUse the straight / slight right lanes.
13
Keep slight left at fork onto I 55
74 mi·1 hr 19 min·I 55
Toward I 55 South: Saint LouisUse the straight / slight right lanes.
14
Take the exit
0.2 mi·31 sec
Toward IL 162: Troy
15
Keep slight left at fork
461 ft·13 sec
16
Turn straight onto IL 162
1.6 mi·2 min·Edwardsville Road
17
Turn right onto South Main Street
0.8 mi·1 min·South Main Street
18
Continue on Troy Ofallon Road
4.2 mi·7 min·Troy Ofallon Road
19
Continue on Scott Troy Road
2.2 mi·3 min·Scott Troy Road
20
Turn right onto Ofallon Troy Road
1.9 mi·3 min·Ofallon Troy Road
21
Continue on O'Fallon Troy Road
392 ft·7 sec·O'Fallon Troy Road
22
Continue on North Lincoln Avenue
2.5 mi·4 min·North Lincoln Avenue
23
Turn right onto West State Street
59 ft·1 sec·West State Street
24
Arrive at destination
West State Street
Trip Plan
For this 5h 40m drive, leaving in the morning is advisable to maximize daylight and avoid potential rush hour traffic around the Chicago metropolitan area. With a total distance of 295.1 miles, it's easily manageable in one day, so you have flexibility with your stop timing. Plan for at least one stop for fuel and to stretch your legs, especially considering the longest stretch on I 55 is 139 miles. Keep an eye on your fuel gauge as you approach O'Fallon, as the fuel cost is estimated at $46, and it’s always good to top off before settling in.
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 147.6 miles from Niles, IL, or about 2h 52m into the drive.
The longest continuous stretch on this route runs about 139 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 65 miles or 1h 20m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 147.6 miles or 2h 52m 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 33m
Traffic, exits, and arrival timing usually matter more near O'Fallon, IL than in the middle of the route.
Before You Leave
+
Open the route before leaving Niles, 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 Niles, IL
This is one driving day of about 295.1 miles and 5h 40m.
Your first comfortable stop window is around 65 miles from Niles, 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 139 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 16
5 decision points cluster between mile 0.5 and 207.3 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
6
0.5 mi into trip|~1m in|West Touhy Avenue
Turn right onto West Touhy Avenue
Lane positioning matters here
Use the right lane.
6
20.8 mi into trip|~29m in|I 294 / Tri-State Tollway
Keep slight right at fork onto I 294 / Tri-State Tollway
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight right lanes.
7
22.6 mi into trip|~32m in
Keep slight right at fork toward I 55 South: Saint Louis
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight right lane.
Toward I 55 South: Saint Louis
8
142.5 mi into trip|~2h 46m in|I 55
Keep slight right at fork onto I 55 toward I 55 South: Saint Louis, Springfield
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 South: Saint Louis, Springfield
7
207.3 mi into trip|~3h 56m in|I 55
Keep slight left at fork onto I 55 toward I 55 South: Saint Louis
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight right lanes.
Toward I 55 South: Saint Louis
Fuel & Cost
Regular Gas
$49.23 one way
$98.45 round trip
$4.24/gal25.4 MPG avg103 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.61
$53.50
$107.00
premium
$5.26
$61.10
$122.20
diesel
$6.18
$71.79
$143.58
Estimated Tolls: $1.05
Tri-state Tollway
(17.5 mi)$1.05
Toll estimates based on average 2024-2025 rates. EZ-Pass/SunPass discounts may lower the actual cost.
Estimated Trip Cost (one way, 1 person)
Fuel
$49
Tolls
$1
Meals
$25–$50
Total
$75–$100
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 103.3 kg one way.
Prices: EIA weekly data, 2026-10-12.
Driving Electric?
About $31 in charging
· 1 stop
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
88.5
1
$30.99
$14.16
Efficient EV
73.8
0
$25.82
$11.80
EV Truck/SUV
118
1
$41.31
$18.89
Gas CO2
103 kg
EV CO2
35 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 Oct 18, 2026
Origin
Niles, IL
Morning
in Niles on Monday
Local time
6:06 AM
CDT
Current temp
42°F
Clear
SSW 10 mph0% chanceLive forecast
Destination
O'Fallon, IL
Morning
in O'Fallon on Monday
Local time
6:06 AM
CDT
Current temp
35°F
Patchy Frost
SE 1 mph0% chanceLive forecast
76°F
Bloomington, IL
148 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
7 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 40m 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...
3 mi from route
~6 min detour
Free
near mile 203.5
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...
17 mi from route
~42 min detour
Free
near mile 20.4
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
This drive is predominantly highway, with 88% of the 295.1 miles on major roads like I 55. You'll experience a long stretch of 139 miles on I 55 without needing to exit. The transition to surface streets will occur towards the end of your trip. Expect consistent highway cruising for the majority of the drive, punctuated by more local traffic and exits as you approach your destination.
88% highway — fuel and pacing are the main things to plan.
24 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 139 mi on I 55.
How Hard Is This Drive?
8/10
This is a straightforward highway drive that stays mostly on I 55 and Adlai Stevenson Expressway. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 0.5 miles in near West Touhy Avenue.
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 16 significant decision points across 295.1 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 0.5 miles (West Touhy Avenue): Lane positioning matters here; at 20.8 miles (I 294 / Tri-State Tollway): Highway fork - watch signs carefully. Lane positioning matters here; at 22.6 miles: Highway fork - watch signs carefully. Lane positioning matters here.
Elevation Profile
Mostly flat terrain
779 ft542 ft
Total Climb
323 ft
Total Descent
407 ft
Highest Point
779 ft
~126.5 mi in
Elevation Range
238 ft
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between Niles, IL and O'Fallon, IL, road signs point toward St. Louis and Springfield.
Doable as a same-day drive at 5h 40m. Total distance: 295.1 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
5h 40m drive, comfortable solo distance.
First-Time Driver
Mostly highway driving (88%). Some complex stretches to watch for.
Frequently Asked Questions
The longest stretch is about 139 miles on I 55. The full list of main roads is in the Roads section above.
Expect about $1.05 in tolls one way, starting with Tri-state Tollway. Most Northeast and Midwest toll agencies accept E-ZPass; in the West and Texas, transponders like TxTag or FasTrak apply. If you do not have a transponder, cashless tolling plates will mail a bill to the vehicle's registered address — usually with a surcharge, so a rental-car toll pass is often cheaper than paying by mail.
Yes — we found about 33 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 O'Fallon, 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 33 rest areas along the route for bathroom stops.
The main spots that need attention: at 0.5 miles (West Touhy Avenue): Lane positioning matters here; at 20.8 miles (I 294 / Tri-State Tollway): Highway fork - watch signs carefully. Lane positioning matters here; at 22.6 miles: 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 5.7 hours each way, a round trip means 11.4 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at O'Fallon, IL before the return drive.
