How far is Decatur, IL from Chicago, IL?
The driving distance from Decatur, IL to Chicago, IL is about 179.9 miles (289.6 km), with a travel time of about 02h 51m by car.
- The straight-line flight distance is about 154.7 miles (249 km).
- For a round trip, plan for roughly 05h 42m 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 51m.
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.
Slight Chance Showers And Thunderstorms then Mostly Sunny
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Decatur and Chicago.
Turn-by-Turn Driving Directions
Step-by-step road directions between Decatur and Chicago.
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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
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3
Continue on North Water Street
4 mi · 6 min · North Water Street
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4
Take the ramp slight right toward I 72 East: Champaign
2373 ft · 1 min
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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
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7
Merge slight left
123.5 mi · 2 hr 17 min
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8
Continue on Dan Ryan Expressway
3.3 mi · 5 min · Dan Ryan Expressway
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9
Keep slight left to continue on Dan Ryan Expressway (Express)
6.2 mi · 9 min · Dan Ryan Expressway (Express)
-
10
Take the exit slight right toward Canalport Avenue, Cermak Road
1620 ft · 40 sec
-
11
Turn slight left onto South Ruble Street
74 m · 7 sec · South Ruble Street
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12
Turn slight left
23 m · 5 sec
-
13
Turn left onto South Canalport Avenue
887 ft · 26 sec · South Canalport Avenue
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14
Turn left onto South Halsted Street
737 ft · 19 sec · South Halsted Street
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15
Turn right onto West Cermak Road
976 ft · 25 sec · West Cermak Road
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16
Turn left
46 m · 11 sec
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17
Turn right
794 ft · 58 sec
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18
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Decatur and Chicago.
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
124 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.
Slight Chance Showers And Thunderstorms then Mostly Sunny leaving Decatur and Mostly Sunny near Chicago.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Decatur to Chicago?
The road trip is about 179.9 miles (289.6 km) and usually takes 02h 51m 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 89.9 miles from Decatur and 90.1 miles from Chicago.
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 25.2 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 12:48 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $23.95 one way or $47.89 round trip. Estimated CO2 is about 56.4 kg one way.
What should you check before leaving?
Before you leave, expect Slight Chance Showers And Thunderstorms then Mostly Sunny around Decatur and Mostly Sunny near Chicago.
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 Decatur and Chicago. Straight-line distance: 154.7 mi (248.96 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 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 |
End: (-87.650099, 41.850032)
Estimated Travel Time
Distance: 290 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 | $23.95 | $47.89 |
| Mid-grade | $4.25 | $27.01 | $54.01 |
| Premium | $4.65 | $29.55 | $59.11 |
| Diesel | $5.30 | $33.68 | $67.36 |
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 · Apr 23, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.