How far is Mattoon, IL from Decatur, IL?
The driving distance from Mattoon, IL to Decatur, IL is about 45.2 miles (72.7 km), with a travel time of about 00h 58m by car.
- The straight-line flight distance is about 39.6 miles (63.7 km).
- For a round trip, plan for roughly 01h 57m 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 00h 58m.
A morning start gives you useful time at the destination and keeps the return out of the late evening.
This departure sits inside the recommended comfort window for the route.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
Village in Illinois, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Sunny
Driving Route Map
The map below follows the saved road route between Mattoon and Decatur.
Turn-by-Turn Driving Directions
Step-by-step road directions between Mattoon and Decatur.
-
1
Start on the route
35 m · 14 sec
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2
Turn left onto North 15th Street
2104 ft · 2 min · North 15th Street
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3
At the end of the road, turn left onto Dewitt Avenue
2.3 mi · 4 min · Dewitt Avenue
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4
Continue on Route 121
35.3 mi · 51 min · Route 121
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5
Continue on South Mount Zion Road
2.1 mi · 3 min · South Mount Zion Road
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6
Turn left
4.7 mi · 8 min
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7
Turn left onto North Main Street
1985 ft · 49 sec · North Main Street
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8
Turn left onto East Wood Street
91 m · 8 sec · East Wood Street
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9
Arrive at your destination
0 m · 1 sec · East Wood Street
Car Route Details
A richer read on the saved driving route between Mattoon and Decatur.
Straightforward drive
The saved road route has a manageable number of maneuvers and should be easy to follow with normal attention to signs.
Route 121
Continue on Route 121
35.3 mi · 00h 51m
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.
Sunny leaving Mattoon and Sunny near Decatur.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Mattoon to Decatur?
The road trip is about 45.2 miles (72.7 km) and usually takes 00h 58m 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?
Bethany is a useful midpoint, sitting about 22.6 miles from Mattoon and 22.6 miles from Decatur.
How much longer is the road route than the straight-line distance?
The direct path is about 39.6 miles (63.7 km), while the road route adds roughly 5.6 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 4:32 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $6.03 one way or $12.07 round trip. Estimated CO2 is about 14.2 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Mattoon and Sunny near Decatur.
Stop Ideas Near Bethany
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 Bethany.
Mattoon station
Effingham
Illinois Terminal
Lincoln
Flight Path Map
This map shows the direct air route between Mattoon and Decatur. Straight-line distance: 39.59 mi (63.71 km).
#1 Mattoon
City in Illinois
| Population | 17,513 |
| Coordinates | 39.4830900, -88.3728300 |
| Altitude | 224 |
| 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: 73 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 30m |
| 40 mph (64.37 km/h) | 01h 07m |
| 50 mph (80.47 km/h) | 00h 54m |
| 60 mph (96.56 km/h) | 00h 45m |
| 70 mph (112.65 km/h) | 00h 38m |
| 80 mph (129 km/h) | 00h 33m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $6.03 | $12.07 |
| Mid-grade | $4.25 | $6.80 | $13.61 |
| Premium | $4.65 | $7.45 | $14.89 |
| Diesel | $5.30 | $8.49 | $16.97 |
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 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.