How far is Decatur, IL from Roscoe, IL?
The driving distance from Decatur, IL to Roscoe, IL is about 189.6 miles (305.2 km), with a travel time of about 03h 38m by car.
- The straight-line flight distance is about 177.8 miles (286.1 km).
- For a round trip, plan for roughly 07h 17m 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 38m.
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.
Human settlement in Illinois, United States of America
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Decatur and Roscoe.
Turn-by-Turn Driving Directions
Step-by-step road directions between Decatur and Roscoe.
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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
8.9 mi · 10 min
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6
Take the exit slight right toward I 39 North: Rockford
120.7 mi · 2 hr 10 min
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7
Merge slight left
2.2 mi · 3 min
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8
Continue straight
1.7 mi · 2 min
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9
Merge slight right onto Jane Addams Memorial Tollway
7.3 mi · 8 min · Jane Addams Memorial Tollway
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10
Take the exit slight right toward IL 173: West Lane Road
1748 ft · 43 sec
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11
Turn right onto West Lane Road
1.6 km · 2 min · West Lane Road
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12
Turn left onto Belvidere Road
4.6 mi · 8 min · Belvidere Road
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13
Continue on Bridge Street
1128 ft · 27 sec · Bridge Street
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14
Turn right onto Main Street
32 m · 3 sec · Main Street
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15
Arrive at your destination
0 m · 1 sec · Main Street
Car Route Details
A richer read on the saved driving route between Decatur and Roscoe.
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 39 North
Take the exit slight right toward I 39 North: Rockford
121 mi · 02h 10m
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.
Sunny leaving Decatur and Mostly Sunny near Roscoe.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Decatur to Roscoe?
The road trip is about 189.6 miles (305.2 km) and usually takes 03h 38m 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?
Lostant is a useful midpoint, sitting about 94.9 miles from Decatur and 94.8 miles from Roscoe.
How much longer is the road route than the straight-line distance?
The direct path is about 177.8 miles (286.1 km), while the road route adds roughly 11.8 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 9:42 AM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $25.23 one way or $50.46 round trip. Estimated CO2 is about 59.5 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Decatur and Mostly Sunny near Roscoe.
Stop Ideas Near Lostant
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 Lostant.
Princeton
Mendota station
Pontiac station
Dwight station
Flight Path Map
This map shows the direct air route between Decatur and Roscoe. Straight-line distance: 177.81 mi (286.15 km).
#1 Decatur
The most populous city in Macon County, Illinois.
| Population | 70,007 |
| Coordinates | 39.8403100, -88.9548000 |
| Altitude | 205 |
| Country | United States |
End: Roscoe (-89.00927, 42.41335)
Estimated Travel Time
Distance: 305 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 06h 19m |
| 40 mph (64.37 km/h) | 04h 44m |
| 50 mph (80.47 km/h) | 03h 47m |
| 60 mph (96.56 km/h) | 03h 09m |
| 70 mph (112.65 km/h) | 02h 42m |
| 80 mph (129 km/h) | 02h 21m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $25.23 | $50.46 |
| Mid-grade | $4.25 | $28.45 | $56.91 |
| Premium | $4.65 | $31.14 | $62.27 |
| Diesel | $5.30 | $35.48 | $70.97 |
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 26, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.