Markham, IL to O'Fallon, IL is 280.5 miles and takes about 5h 11m via I 57 and I 70, with a fuel budget near $43 and enough daylight to finish in a day. This trip stays within the Midwest, entirely within Illinois, making it a straightforward drive. With nearly all highway miles, it's a quick connection between two points. You'll find this route efficient if you're looking for a direct path with minimal fuss. Plan for a single day of travel to cover the distance comfortably.
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
140.2 miles from Markham, IL
A natural place for your longest stop of the day
, about 2h 33m into the drive
.
Main Roads
Road
Distance
Duration
I 57
187.1 mi
3h 22m
I 70
71.4 mi
1h 16m
IL 4
11.7 mi
17m
US 50
3.8 mi
4m
I 80
2.3 mi
3m
Highway 50
2.1 mi
3m
Kedzie Avenue
0.6 mi
1m
South Lincoln Avenue
0.5 mi
<1m
Longest stretch:
I 57
— 187.1 mi, about 3h 22m
Traffic on I-70
Hour-of-day weekday pattern from 16 FHWA count stations on your route.
Peak
3 PM
~1,261 veh/hr typical
· worst 1,677
Quietest
2 AM
~249 veh/hr
Peak-to-quiet ratio
5.1×
busier at peak than in the quiet hours
12a6anoon6p11p
Averaged across 99 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 Markham, IL and O'Fallon, IL.
1
Start on 163rd Street
64 ft·6 sec·163rd Street
2
Turn right onto Kedzie Avenue
0.6 mi·1 min·Kedzie Avenue
3
Take the ramp
0.5 mi·1 min
Toward I 80 West
4
Merge onto I 80
2.3 mi·3 min·I 80
5
Take the exit
0.3 mi·31 sec
Exit 151AToward I 57 South: MemphisUse the straight / slight left lanes.
6
Merge onto I 57
187 mi·3 hr 22 min·I 57
Use the straight / right lanes.
7
Keep slight right at fork onto I 70
71 mi·1 hr 16 min·I 70
Toward I 70 West: Saint Louis
8
Take the exit
0.3 mi·33 sec
Toward IL 4: Staunton, Lebanon
9
Turn left onto IL 4
12 mi·17 min·IL 4
10
Continue on US 50
3.8 mi·4 min·US 50
11
Continue on Highway 50
2.1 mi·3 min·Highway 50
12
Turn right onto South Lincoln Avenue
0.5 mi·55 sec·South Lincoln Avenue
13
Turn left onto West State Street
59 ft·1 sec·West State Street
14
Arrive at destination
West State Street
Trip Plan
Consider leaving in the morning to maximize daylight and take advantage of the single-day travel time. With a duration of just over 5 hours, you can comfortably complete this trip without needing an overnight stop. The fuel cost is estimated at $43, so ensure you have enough available. The longest stretch without a significant change in road type is 187.1 miles on I 57; plan your fuel and rest stops accordingly before you get too far into that segment. Since this is a relatively short, highway-focused drive, you have flexibility if you need to adjust your departure time.
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 140.2 miles from Markham, IL, or about 2h 33m into the drive.
The longest continuous stretch on this route runs about 187.1 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 62 miles or 1h 8m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 140.2 miles or 2h 33m 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 10m
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 Markham, 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 Markham, IL
This is one driving day of about 280.5 miles and 5h 11m.
Your first comfortable stop window is around 62 miles from Markham, 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 57 for about 187.1 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 10
5 decision points cluster between mile 3.3 and 262.4 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
7
3.3 mi into trip|~5m in
Take the exit toward I 57 South: Memphis
Exit ramp - move to the correct lane early. Lane positioning matters here
Use the straight / slight left lanes.
Exit 151A
Toward I 57 South: Memphis
5
3.6 mi into trip|~5m in|I 57
Merge onto I 57
Merge point - match speed before joining. Lane positioning matters here
Use the straight / right lanes.
5
190.7 mi into trip|~3h 27m in|I 70
Keep slight right at fork onto I 70 toward I 70 West: Saint Louis
Highway fork - watch signs carefully
Toward I 70 West: Saint Louis
5
262.1 mi into trip|~4h 44m in
Take the exit toward IL 4: Staunton, Lebanon
Exit ramp - move to the correct lane early. Multiple destination signs - pick the right one
Toward IL 4: Staunton, Lebanon
4
262.4 mi into trip|~4h 45m in|IL 4
Turn left onto IL 4
Navigation decision point
Fuel & Cost
Regular Gas
$46.79 one way
$93.58 round trip
$4.24/gal25.4 MPG avg98 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.61
$50.85
$101.71
premium
$5.26
$58.08
$116.15
diesel
$6.18
$68.24
$136.47
No toll roads detected on this route.
Estimated Trip Cost (one way, 1 person)
Fuel
$47
Meals
$25–$50
Total
$72–$97
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 98.1 kg one way.
Prices: EIA weekly data, 2026-10-12.
Driving Electric?
About $29 in charging
· 1 stop
· 66% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
84.2
1
$29.45
$13.46
Efficient EV
70.1
0
$24.54
$11.22
EV Truck/SUV
112.2
1
$39.27
$17.95
Gas CO2
98 kg
EV CO2
33 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
Markham, IL
Morning
in Markham on Monday
Local time
6:27 AM
CDT
Current temp
37°F
Clear
SSW 10 mph0% chanceLive forecast
Destination
O'Fallon, IL
Morning
in O'Fallon on Monday
Local time
6:27 AM
CDT
Current temp
35°F
Patchy Frost
SE 1 mph0% chanceLive forecast
77°F
Shelbyville, IL
140 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
2 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 11m 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.
Pullman National Historical Park
National Historical Park
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...
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
This drive is almost entirely on major highways, with 99% of the 280.5 miles taking place on roads like I 57 and I 70. You'll experience one long stretch of 187.1 miles on I 57, so be prepared for extended periods of highway cruising. The transition to IL 4 marks the end of the highway dominance, introducing more typical surface road driving for the remaining miles. Expect numerous exits and merging traffic as you navigate these interstate segments.
99% highway — fuel and pacing are the main things to plan.
14 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 187.1 mi on I 57.
How Hard Is This Drive?
4/10
This is a straightforward highway drive that stays mostly on I 57 and I 70. There are only a few real navigation decisions along the way. The trickiest moment comes around 3.3 miles in.
Driving Effort4/10
Easy - simple navigation with a manageable amount of wheel time
Balances navigation complexity with total wheel time.
This is a straightforward 5h 11m drive. You will face about 10 decision points, but nothing that requires special attention if you follow navigation.
Where does it get tricky?
The main spots that need attention: at 3.3 miles: Exit ramp - move to the correct lane early. Lane positioning matters here; at 3.6 miles (I 57): Merge point - match speed before joining. Lane positioning matters here; at 190.7 miles (I 70): Highway fork - watch signs carefully.
Elevation Profile
Mostly flat terrain
748 ft507 ft
Total Climb
321 ft
Total Descent
389 ft
Highest Point
748 ft
~100.2 mi in
Elevation Range
241 ft
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
On the drive from Markham, IL to O'Fallon, IL, road signs begin pointing toward Lebanon along the way.
The longest stretch is about 187.1 miles on I 57. The full list of main roads is in the Roads section above.
Yes — we found about 36 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.
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 36 rest areas along the route for bathroom stops.
The main spots that need attention: at 3.3 miles: Exit ramp - move to the correct lane early. Lane positioning matters here; at 3.6 miles (I 57): Merge point - match speed before joining. Lane positioning matters here; at 190.7 miles (I 70): Highway fork - watch signs carefully.
Yes — 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 10.4 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.
