How far is Decatur, IL from East Saint Louis, IL?
The driving distance from Decatur, IL to East Saint Louis, IL is about 115.5 miles (185.8 km), with a travel time of about 02h 25m by car.
- The straight-line flight distance is about 105.6 miles (170 km).
- For a round trip, plan for roughly 04h 50m 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 25m.
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 Montgomery County, Illinois
Route Weather Snapshot
Check the forecast at both ends before you head out.
Slight Chance Showers And Thunderstorms
Isolated Showers And Thunderstorms
Driving Route Map
The map below follows the saved road route between Decatur and East Saint Louis.
Turn-by-Turn Driving Directions
Step-by-step road directions between Decatur and East Saint Louis.
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1
Start on East Wood Street
91 m · 16 sec · East Wood Street
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2
Turn left onto South Main Street
1.3 mi · 2 min · South Main Street
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3
Turn right onto West South Side Drive
1.5 km · 1 min · West South Side Drive
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4
Turn left onto South Taylorville Road
12.9 mi · 15 min · South Taylorville Road
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5
Continue on County Road 2080 E
18.4 mi · 23 min · County Road 2080 E
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6
Continue on County Road 975 N
3056 ft · 52 sec · County Road 975 N
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7
Continue on Sarpy Street
12.2 mi · 21 min · Sarpy Street
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8
Continue on Front Street
7.6 mi · 11 min · Front Street
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9
Turn left onto I 55 South: East Saint Louis
1822 ft · 44 sec
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10
Merge slight left
59.6 mi · 1 hr 5 min
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11
Keep slight right to continue on I 70 West: Kansas City
76 m · 6 sec
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12
Take the exit slight right toward Exchange Avenue
1104 ft · 33 sec
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13
Turn left onto Exchange Avenue
1024 ft · 30 sec · Exchange Avenue
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14
Turn right onto North 9th Street
802 ft · 14 sec · North 9th Street
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15
Enter the roundabout and take exit 2 toward North 9th Street
36 m · 2 sec · North 9th Street
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16
Exit the roundabout onto North 9th Street
594 ft · 10 sec · North 9th Street
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17
Enter the roundabout and take exit 2 toward North 9th Street
39 m · 2 sec · North 9th Street
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18
Exit the roundabout onto North 9th Street
1.1 km · 1 min · North 9th Street
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19
Turn left onto Saint Louis Avenue
112 m · 16 sec · Saint Louis Avenue
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20
Turn left onto North 10th Street
585 ft · 10 sec · North 10th Street
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21
Arrive at your destination
0 m · 1 sec · North 10th Street
Car Route Details
A richer read on the saved driving route between Decatur and East Saint Louis.
Interchange-aware route
The drive includes several ramps, exits, or merges, so checking the next few maneuvers before busy interchanges is useful.
I 55 South
Merge slight left
59.6 mi · 01h 06m
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.
Slight Chance Showers And Thunderstorms leaving Decatur and Isolated Showers And Thunderstorms near East Saint Louis.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Decatur to East Saint Louis?
The road trip is about 115.5 miles (185.8 km) and usually takes 02h 25m 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?
Zanesville is a useful midpoint, sitting about 57.7 miles from Decatur and 57.7 miles from East Saint Louis.
How much longer is the road route than the straight-line distance?
The direct path is about 105.6 miles (170 km), while the road route adds roughly 9.9 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 1:40 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $15.35 one way or $30.70 round trip. Estimated CO2 is about 36.2 kg one way.
What should you check before leaving?
Before you leave, expect Slight Chance Showers And Thunderstorms around Decatur and Isolated Showers And Thunderstorms near East Saint Louis.
Stop Ideas Near Zanesville
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 Zanesville.
Carlinville
Springfield station
Alton
Gateway Transportation Center
Flight Path Map
This map shows the direct air route between Decatur and East Saint Louis. Straight-line distance: 105.61 mi (169.97 km).
#1 Decatur
The most populous city in Macon County, Illinois.
| Population | 70,007 |
| Coordinates | 39.8403100, -88.9548000 |
| Altitude | 205 |
| Country | United States |
#2 East Saint Louis
City in St.
| Population | 25,776 |
| Coordinates | 38.6245000, -90.1509400 |
| Altitude | 127 |
| Country | United States |
End: East Saint Louis (-90.15094, 38.6245)
Estimated Travel Time
Distance: 186 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 03h 50m |
| 40 mph (64.37 km/h) | 02h 53m |
| 50 mph (80.47 km/h) | 02h 18m |
| 60 mph (96.56 km/h) | 01h 55m |
| 70 mph (112.65 km/h) | 01h 38m |
| 80 mph (129 km/h) | 01h 26m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $15.35 | $30.70 |
| Mid-grade | $4.25 | $17.31 | $34.62 |
| Premium | $4.65 | $18.94 | $37.88 |
| Diesel | $5.30 | $21.59 | $43.17 |
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 16, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.