How far is Decatur, IL from Des Plaines, IL?
The driving distance from Decatur, IL to Des Plaines, IL is about 186.5 miles (300.2 km), with a travel time of about 03h 06m by car.
- The straight-line flight distance is about 161.5 miles (259.9 km).
- For a round trip, plan for roughly 06h 13m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 8:00 AM CDT.
Reverse, save, or send this route
This drive is better planned with a longer stop or an overnight stay. Copy the route link, send it to another device, or print a clean version before you head out.
This drive is better planned with a longer stop or an overnight stay.
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 03h 06m.
An early departure helps you fit a real stop into the day without turning the return into a late-night drive.
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.
Township in Livingston County, Illinois
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Mostly Cloudy then Rain Likely
Driving Route Map
The map below follows the saved road route between Decatur and Des Plaines.
Turn-by-Turn Driving Directions
Step-by-step road directions between Decatur and Des Plaines.
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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
27.4 mi · 37 min · North Water Street
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4
Continue on North 1450 East Road
14.7 mi · 18 min · North 1450 East Road
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5
Take the exit slight right toward I 74 West, US 51 North: Peoria, Rockford
122.1 mi · 2 hr 16 min
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6
Take the exit slight right toward I 294 Tollway North: Wisconsin
1.6 mi · 3 min
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7
Keep slight left to continue on I 294 North: Wisconsin
1694 ft · 41 sec
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8
Merge slight left onto Tri-State Tollway
4.8 mi · 6 min · Tri-State Tollway
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9
Keep slight left to continue on Tri-State Tollway
11.7 mi · 15 min · Tri-State Tollway
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10
Take the exit slight right toward Touhy Avenue
635 ft · 16 sec
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11
Keep slight left to continue on Touhy Avenue
2694 ft · 1 min
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12
Keep slight left to continue on Touhy Avenue West
688 ft · 17 sec
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13
Keep slight right to continue on Touhy Avenue West
1799 ft · 44 sec
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14
Turn straight onto East Touhy Avenue
99 m · 7 sec · East Touhy Avenue
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15
Turn slight right
103 m · 9 sec
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16
Turn right onto South Des Plaines River Road
1.7 mi · 3 min · South Des Plaines River Road
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17
Turn left onto Henry Avenue
557 ft · 24 sec · Henry Avenue
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18
Arrive at your destination
0 m · 1 sec · Henry Avenue
Car Route Details
A richer read on the saved driving route between Decatur and Des Plaines.
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 74 West
Take the exit slight right toward I 74 West, US 51 North: Peoria, Rockford
122 mi · 02h 16m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A longer out-and-back drive
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
Mostly Sunny leaving Decatur and Mostly Cloudy then Rain Likely near Des Plaines.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Decatur to Des Plaines?
The road trip is about 186.5 miles (300.2 km) and usually takes 03h 06m in normal driving conditions.
Is this a same-day trip or an overnight route?
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
What is the halfway point on this route?
Odell is a useful midpoint, sitting about 93.2 miles from Decatur and 93.4 miles from Des Plaines.
How much longer is the road route than the straight-line distance?
The direct path is about 161.5 miles (259.9 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 6:00 AM to 8:00 AM CDT. If you want a more comfortable same-day return, try to leave by 10:46 AM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $24.81 one way or $49.63 round trip. Estimated CO2 is about 58.5 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Decatur and Mostly Cloudy then Rain Likely near Des Plaines.
Stop Ideas Near Odell
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 Odell.
Dwight station
Pontiac station
Gilman
Kankakee
Flight Path Map
This map shows the direct air route between Decatur and Des Plaines. Straight-line distance: 161.51 mi (259.93 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 Des Plaines
The most populous city in Cook County, Illinois.
| Population | 58,179 |
| Coordinates | 42.0333600, -87.8834000 |
| Altitude | 193 |
| Country | United States |
End: Henry Avenue (-87.883408, 42.033456)
Estimated Travel Time
Distance: 300 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 06h 12m |
| 40 mph (64.37 km/h) | 04h 39m |
| 50 mph (80.47 km/h) | 03h 43m |
| 60 mph (96.56 km/h) | 03h 06m |
| 70 mph (112.65 km/h) | 02h 39m |
| 80 mph (129 km/h) | 02h 19m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $24.81 | $49.63 |
| Mid-grade | $4.25 | $27.98 | $55.97 |
| Premium | $4.65 | $30.62 | $61.25 |
| Diesel | $5.30 | $34.90 | $69.80 |
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.