How far is Marion, IL from Decatur, IL?
The driving distance from Marion, IL to Decatur, IL is about 122 miles (196.4 km), with a travel time of about 02h 31m by car.
- The straight-line flight distance is about 99.9 miles (160.8 km).
- For a round trip, plan for roughly 05h 02m 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 31m.
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.
Township in Shelby County, Illinois
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Mostly Sunny then Chance Showers And Thunderstorms
Driving Route Map
The map below follows the saved road route between Marion and Decatur.
Turn-by-Turn Driving Directions
Step-by-step road directions between Marion and Decatur.
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1
Start on 2050N
2.9 mi · 11 min · 2050N
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2
At the end of the road, turn left onto 500E
12.3 mi · 17 min · 500E
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3
Continue on South West Street
2.5 mi · 5 min · South West Street
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4
Continue on County Road 1100 East
6.7 mi · 9 min · County Road 1100 East
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5
Continue on South Van Buren Street
11 mi · 15 min · South Van Buren Street
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6
Turn left
23.2 mi · 35 min
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7
Turn left onto East Fayette Avenue
921 ft · 18 sec · East Fayette Avenue
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8
Turn right onto South 3rd Street
1.7 mi · 3 min · South 3rd Street
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9
Take the ramp right toward I-57 North, I-70 East: Champaign, Terre Haute
2624 ft · 1 min
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10
Merge slight left
1.3 km · 55 sec
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11
Keep slight left to continue on I 57 North: Chicago
20.6 mi · 22 min
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12
Take the exit slight right toward US 45, IL 121: Mattoon, Toledo
1299 ft · 28 sec
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13
Turn straight onto Lakeland Boulevard
3.9 mi · 6 min · Lakeland Boulevard
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14
At the end of the road, turn left onto Charleston Avenue
118 m · 11 sec · Charleston Avenue
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15
Turn right onto South 19th Street
2731 ft · 60 sec · South 19th Street
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16
Turn left onto Dewitt Avenue
2 mi · 3 min · Dewitt Avenue
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17
Continue on Route 121
35.3 mi · 51 min · Route 121
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18
Continue on South Mount Zion Road
2.1 mi · 3 min · South Mount Zion Road
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19
Turn left
4.7 mi · 8 min
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20
Turn left onto North Main Street
1985 ft · 49 sec · North Main Street
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21
Turn left onto East Wood Street
91 m · 8 sec · East Wood Street
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22
Arrive at your destination
0 m · 1 sec · East Wood Street
Car Route Details
A richer read on the saved driving route between Marion 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.
Mostly Sunny leaving Marion and Mostly Sunny then Chance Showers And Thunderstorms near Decatur.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Marion to Decatur?
The road trip is about 122 miles (196.4 km) and usually takes 02h 31m 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?
Sigel is a useful midpoint, sitting about 65.9 miles from Marion and 56.2 miles from Decatur.
How much longer is the road route than the straight-line distance?
The direct path is about 99.9 miles (160.8 km), while the road route adds roughly 22.1 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 1:28 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $16.25 one way or $32.51 round trip. Estimated CO2 is about 38.3 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Marion and Mostly Sunny then Chance Showers And Thunderstorms near Decatur.
Stop Ideas Near Sigel
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 Sigel.
Effingham
Mattoon station
Centralia station
Illinois Terminal
Flight Path Map
This map shows the direct air route between Marion and Decatur. Straight-line distance: 99.94 mi (160.84 km).
#1 Marion
City in and the county seat of Williamson County, Illinois, United States
| Population | 17,417 |
| Coordinates | 38.5511600, -88.1083700 |
| Altitude | 127 |
| 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: 196 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 04h 03m |
| 40 mph (64.37 km/h) | 03h 03m |
| 50 mph (80.47 km/h) | 02h 26m |
| 60 mph (96.56 km/h) | 02h 02m |
| 70 mph (112.65 km/h) | 01h 44m |
| 80 mph (129 km/h) | 01h 31m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $16.25 | $32.51 |
| Mid-grade | $4.25 | $18.33 | $36.66 |
| Premium | $4.65 | $20.06 | $40.12 |
| Diesel | $5.30 | $22.86 | $45.72 |
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 · Jun 06, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.