How far is Sycamore, IL from Decatur, IL?
The driving distance from Sycamore, IL to Decatur, IL is about 174.4 miles (280.7 km), with a travel time of about 02h 52m by car.
- The straight-line flight distance is about 149.1 miles (240 km).
- For a round trip, plan for roughly 05h 45m 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 52m.
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.
City in Marshall County, Illinois, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Sunny
Driving Route Map
The map below follows the saved road route between Sycamore and Decatur.
Turn-by-Turn Driving Directions
Step-by-step road directions between Sycamore and Decatur.
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1
Start on West State Street
7 m · 8 sec · West State Street
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2
Turn left onto Somonauk Street
127 m · 11 sec · Somonauk Street
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3
Turn right onto West Elm Street
632 ft · 17 sec · West Elm Street
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4
Continue on DeKalb Avenue
1.1 mi · 2 min · DeKalb Avenue
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5
Turn left onto South Peace Road
4.4 mi · 7 min · South Peace Road
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6
Continue on North Peace Road
1.4 mi · 3 min · North Peace Road
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7
Take the ramp left toward I 88 West Toll: Moline Rock Island
1570 ft · 38 sec
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8
Merge slight left onto Ronald Reagan Memorial Tollway
15.6 mi · 17 min · Ronald Reagan Memorial Tollway
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9
Take the exit slight right toward I 39 South, US 51 South: Bloomington, Normal
1786 ft · 43 sec
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10
Merge slight left
96.8 mi · 1 hr 44 min
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11
Keep slight right to continue on I 55 South, US 51 South: Peoria, Champaign, Saint Louis, Decatur
7.6 mi · 8 min
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12
Keep slight left to continue on I 74 East, US 51 South, US 55 Business North: Indianapolis, Decatur
2.1 mi · 2 min
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13
Take the exit slight right toward US 51 South, US 51 Business North: Decatur, Bloomington
1616 ft · 40 sec
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14
Continue on North 1450 East Road
14.7 mi · 18 min · North 1450 East Road
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15
Continue on North Walnut Street
23.2 mi · 30 min · North Walnut Street
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16
Turn straight
4.7 mi · 8 min
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17
Turn left onto East Wood Street
91 m · 8 sec · East Wood Street
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18
Arrive at your destination
0 m · 1 sec · East Wood Street
Car Route Details
A richer read on the saved driving route between Sycamore 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 39 South
Merge slight left
96.8 mi · 01h 44m
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 Sunny leaving Sycamore and Sunny near Decatur.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Sycamore to Decatur?
The road trip is about 174.4 miles (280.7 km) and usually takes 02h 52m 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?
Wenona is a useful midpoint, sitting about 86.4 miles from Sycamore and 88 miles from Decatur.
How much longer is the road route than the straight-line distance?
The direct path is about 149.1 miles (240 km), while the road route adds roughly 25.3 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 12:44 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $23.23 one way or $46.46 round trip. Estimated CO2 is about 54.7 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Sycamore and Sunny near Decatur.
Stop Ideas Near Wenona
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 Wenona.
Pontiac station
Princeton
Dwight station
Mendota station
Flight Path Map
This map shows the direct air route between Sycamore and Decatur. Straight-line distance: 149.11 mi (239.97 km).
#1 Sycamore
City in Illinois
| Population | 18,317 |
| Coordinates | 41.9889200, -88.6867500 |
| Altitude | 266 |
| 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: 281 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 05h 48m |
| 40 mph (64.37 km/h) | 04h 21m |
| 50 mph (80.47 km/h) | 03h 29m |
| 60 mph (96.56 km/h) | 02h 54m |
| 70 mph (112.65 km/h) | 02h 29m |
| 80 mph (129 km/h) | 02h 10m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $23.23 | $46.46 |
| Mid-grade | $4.25 | $26.20 | $52.40 |
| Premium | $4.65 | $28.67 | $57.34 |
| Diesel | $5.30 | $32.67 | $65.35 |
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.