How far is Chicago, IL from Decatur, IL?
The driving distance from Chicago, IL to Decatur, IL is about 179.7 miles (289.2 km), with a travel time of about 02h 59m by car.
- The straight-line flight distance is about 154.7 miles (249 km).
- For a round trip, plan for roughly 05h 59m 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 59m.
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.
Village in Iroquois County, Illinois, United States of America
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Cloudy then Rain Likely
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Chicago and Decatur.
Turn-by-Turn Driving Directions
Step-by-step road directions between Chicago and Decatur.
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1
Start on the route
943 ft · 1 min
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2
At the end of the road, turn right onto West Cermak Road
947 ft · 26 sec · West Cermak Road
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3
Turn left onto South Halsted Street
737 ft · 17 sec · South Halsted Street
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4
Turn right onto South Canalport Avenue
87 m · 6 sec · South Canalport Avenue
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5
Turn slight right
34 m · 5 sec
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6
Take the ramp straight toward I 90 East, I 94 East
139 m · 11 sec
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7
Keep slight left to continue on I 90, I 94 East: Indiana
929 ft · 23 sec
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8
Merge slight left onto Dan Ryan Expressway
1.2 km · 48 sec · Dan Ryan Expressway
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9
Keep slight left to continue on Dan Ryan Expressway (Express)
8.8 mi · 12 min · Dan Ryan Expressway (Express)
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10
Keep slight right to continue on I 57 South: Memphis
123.2 mi · 2 hr 17 min
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11
Take the exit slight right toward I 72 West: Decatur
2596 ft · 1 min
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12
Merge slight left
36.6 mi · 39 min
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13
Take the exit slight right toward IL 48: Oreana, Decatur
2140 ft · 39 sec
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14
Turn left
5.1 mi · 8 min
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15
Turn right onto East Eldorado Street
1163 ft · 29 sec · East Eldorado Street
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16
Continue straight
1.4 mi · 2 min
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17
Turn left onto North Main Street
1985 ft · 49 sec · North Main Street
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18
Turn left onto East Wood Street
91 m · 8 sec · East Wood Street
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19
Arrive at your destination
0 m · 1 sec · East Wood Street
Car Route Details
A richer read on the saved driving route between Chicago and Decatur.
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 South
Keep slight right to continue on I 57 South: Memphis
123 mi · 02h 17m
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.
Mostly Cloudy then Rain Likely leaving Chicago and Mostly Sunny near Decatur.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Chicago to Decatur?
The road trip is about 179.7 miles (289.2 km) and usually takes 02h 59m 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?
Onarga is a useful midpoint, sitting about 89.1 miles from Chicago and 90.6 miles from Decatur.
How much longer is the road route than the straight-line distance?
The direct path is about 154.7 miles (249 km), while the road route adds roughly 25 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 12:30 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $23.91 one way or $47.82 round trip. Estimated CO2 is about 56.3 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Cloudy then Rain Likely around Chicago and Mostly Sunny near Decatur.
Stop Ideas Near Onarga
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 Onarga.
Gilman
Kankakee
Rantoul
Dwight station
Flight Path Map
This map shows the direct air route between Chicago and Decatur. Straight-line distance: 154.7 mi (248.96 km).
#1 Chicago
The third most populous city in the United States and the center of the Chicago metropolitan area.
| Population | 2,677,643 |
| Coordinates | 41.850033, -87.6500523 |
| Altitude | 179 |
| Country | United States |
#2 Decatur
The most populous city in Macon County, Illinois.
| Population | 70,007 |
| Coordinates | 39.8403100, -88.9548000 |
| Altitude | 205 |
| Country | United States |
End: East Wood Street (-88.954801, 39.840341)
Estimated Travel Time
Distance: 289 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 05h 59m |
| 40 mph (64.37 km/h) | 04h 29m |
| 50 mph (80.47 km/h) | 03h 35m |
| 60 mph (96.56 km/h) | 02h 59m |
| 70 mph (112.65 km/h) | 02h 34m |
| 80 mph (129 km/h) | 02h 14m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $23.91 | $47.82 |
| Mid-grade | $4.25 | $26.96 | $53.93 |
| Premium | $4.65 | $29.51 | $59.01 |
| Diesel | $5.30 | $33.63 | $67.25 |
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 12, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.