How far is Glen Carbon, IL from Decatur, IL?
The driving distance from Glen Carbon, IL to Decatur, IL is about 102.3 miles (164.6 km), with a travel time of about 01h 50m by car.
- The straight-line flight distance is about 93.3 miles (150.2 km).
- For a round trip, plan for roughly 03h 41m 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 01h 50m.
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.
Town in Illinois
Route Weather Snapshot
Check the forecast at both ends before you head out.
Partly Sunny
Partly Sunny
Driving Route Map
The map below follows the saved road route between Glen Carbon and Decatur.
Turn-by-Turn Driving Directions
Step-by-step road directions between Glen Carbon and Decatur.
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1
Start on South Main Street
2733 ft · 1 min · South Main Street
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2
Turn right onto Glen Crossing Road
1.1 mi · 3 min · Glen Crossing Road
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3
Turn left onto South State Route 159
158 m · 10 sec · South State Route 159
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4
Take the ramp right toward I 270 East: Effingham
1307 ft · 32 sec
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5
Merge slight left
2.5 mi · 3 min
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6
Take the exit slight right toward I 55 North: Chicago, Springfield
1668 ft · 47 sec
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7
Merge slight left
43.4 mi · 47 min
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8
Take the exit slight right toward IL 48, IL 127: Raymond, Taylorville, Hillsboro
1658 ft · 31 sec
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9
Keep slight right to continue on IL 48, IL 127: Raymond, Taylorville, Hillsboro
45 m · 3 sec
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10
Turn straight onto North 22nd Avenue
7.2 mi · 11 min · North 22nd Avenue
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11
Continue on Sarpy Street
12.2 mi · 21 min · Sarpy Street
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12
Continue on County Road 975 N
3056 ft · 52 sec · County Road 975 N
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13
Continue on Jaycee Drive
18.4 mi · 23 min · Jaycee Drive
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14
Continue on North Railroad Avenue
12.9 mi · 15 min · North Railroad Avenue
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15
Turn right onto West South Side Drive
1.3 km · 1 min · West South Side Drive
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16
Turn slight left
1.4 mi · 3 min
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17
Turn left onto East Wood Street
155 m · 16 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 Glen Carbon and Decatur.
Interchange-aware route
The drive includes several ramps, exits, or merges, so checking the next few maneuvers before busy interchanges is useful.
I 55 North
Merge slight left
43.4 mi · 00h 47m
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.
Partly Sunny leaving Glen Carbon and Partly Sunny near Decatur.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Glen Carbon to Decatur?
The road trip is about 102.3 miles (164.6 km) and usually takes 01h 50m 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?
Raymond is a useful midpoint, sitting about 51.1 miles from Glen Carbon and 51.2 miles from Decatur.
How much longer is the road route than the straight-line distance?
The direct path is about 93.3 miles (150.2 km), while the road route adds roughly 9 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 2:48 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $13.61 one way or $27.23 round trip. Estimated CO2 is about 32.1 kg one way.
What should you check before leaving?
Before you leave, expect Partly Sunny around Glen Carbon and Partly Sunny near Decatur.
Stop Ideas Near Raymond
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 Raymond.
Carlinville
Springfield station
Alton
Effingham
Flight Path Map
This map shows the direct air route between Glen Carbon and Decatur. Straight-line distance: 93.35 mi (150.24 km).
#1 Glen Carbon
Village in Illinois, United States
| Population | 12,887 |
| Coordinates | 38.7483800, -89.9831600 |
| Altitude | 142 |
| 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: 165 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 03h 24m |
| 40 mph (64.37 km/h) | 02h 33m |
| 50 mph (80.47 km/h) | 02h 02m |
| 60 mph (96.56 km/h) | 01h 42m |
| 70 mph (112.65 km/h) | 01h 27m |
| 80 mph (129 km/h) | 01h 16m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $13.61 | $27.23 |
| Mid-grade | $4.25 | $15.35 | $30.71 |
| Premium | $4.65 | $16.80 | $33.60 |
| Diesel | $5.30 | $19.15 | $38.29 |
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 30, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.