How far is Decatur, IL from Markham, IL?
The driving distance from Decatur, IL to Markham, IL is about 160 miles (257.5 km), with a travel time of about 02h 28m by car.
- The straight-line flight distance is about 137.9 miles (222 km).
- For a round trip, plan for roughly 04h 57m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 8:00 AM to 10:00 AM CDT.
Reverse, save, or send this route
This route works well as a day trip with time at the destination. Copy the route link, send it to another device, or print a clean version before you head out.
This route works well as a day trip with time at the destination.
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 02h 28m.
A morning start gives you useful time at the destination and keeps the return out of the late evening.
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.
Human settlement in Iroquois County, Illinois, United States of America
Route Weather Snapshot
Check the forecast at both ends before you head out.
Areas Of Frost then Mostly Sunny
Areas Of Frost then Mostly Sunny
Driving Route Map
The map below follows the saved road route between Decatur and Markham.
Turn-by-Turn Driving Directions
Step-by-step road directions between Decatur and Markham.
-
1
Start on East Wood Street
155 m · 23 sec · East Wood Street
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2
Turn left onto South Franklin Street
2129 ft · 46 sec · South Franklin Street
-
3
Continue on North Water Street
4 mi · 6 min · North Water Street
-
4
Take the ramp slight right toward I 72 East: Champaign
2373 ft · 1 min
-
5
Merge slight left
40.4 mi · 44 min
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6
Take the exit slight right toward I 57 North: Chicago
1520 ft · 43 sec
-
7
Merge slight left
109.6 mi · 1 hr 59 min
-
8
Take the exit slight right toward I 80 East: Indiana
2657 ft · 50 sec
-
9
Merge slight left
2.2 mi · 3 min
-
10
Take the exit slight right toward Kedzie Avenue
1232 ft · 33 sec
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11
Turn left onto Kedzie Avenue
1.3 km · 2 min · Kedzie Avenue
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12
Turn left onto 163rd Street
20 m · 3 sec · 163rd Street
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13
Arrive at your destination
0 m · 1 sec · 163rd Street
Car Route Details
A richer read on the saved driving route between Decatur and Markham.
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 57 North
Merge slight left
110 mi · 01h 59m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A comfortable day-trip route
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
Areas Of Frost then Mostly Sunny leaving Decatur and Areas Of Frost then Mostly Sunny near Markham.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Decatur to Markham?
The road trip is about 160 miles (257.5 km) and usually takes 02h 28m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
What is the halfway point on this route?
Buckley is a useful midpoint, sitting about 79.5 miles from Decatur and 80.5 miles from Markham.
How much longer is the road route than the straight-line distance?
The direct path is about 137.9 miles (222 km), while the road route adds roughly 22.1 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 8:00 AM to 10:00 AM CDT. If you want a more comfortable same-day return, try to leave by 1:32 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $21.31 one way or $42.61 round trip. Estimated CO2 is about 50.2 kg one way.
What should you check before leaving?
Before you leave, expect Areas Of Frost then Mostly Sunny around Decatur and Areas Of Frost then Mostly Sunny near Markham.
Stop Ideas Near Buckley
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Buckley.
Gilman
Rantoul
Illinois Terminal
Pontiac station
Flight Path Map
This map shows the direct air route between Decatur and Markham. Straight-line distance: 137.94 mi (222 km).
#1 Decatur
The most populous city in Macon County, Illinois.
| Population | 70,007 |
| Coordinates | 39.8403100, -88.9548000 |
| Altitude | 205 |
| Country | United States |
#2 Markham
A city located in Cook County, Illinois.
| Population | 13,400 |
| Coordinates | 41.5936500, -87.6947700 |
| Altitude | 189 |
| Country | United States |
End: 163rd Street (-87.694771, 41.593508)
Estimated Travel Time
Distance: 258 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 05h 19m |
| 40 mph (64.37 km/h) | 04h 00m |
| 50 mph (80.47 km/h) | 03h 12m |
| 60 mph (96.56 km/h) | 02h 40m |
| 70 mph (112.65 km/h) | 02h 17m |
| 80 mph (129 km/h) | 01h 59m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $21.31 | $42.61 |
| Mid-grade | $4.25 | $24.03 | $48.06 |
| Premium | $4.65 | $26.30 | $52.59 |
| Diesel | $5.30 | $29.97 | $59.94 |
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 · May 02, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.