How far is Joliet, IL from Decatur, IL?
The driving distance from Joliet, IL to Decatur, IL is about 146 miles (235 km), with a travel time of about 02h 24m by car.
- The straight-line flight distance is about 125 miles (201.2 km).
- For a round trip, plan for roughly 04h 49m 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 24m.
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.
Route Weather Snapshot
Check the forecast at both ends before you head out.
Slight Chance Rain Showers then Chance Showers And Thunderstorms
Driving Route Map
The map below follows the saved road route between Joliet and Decatur.
Turn-by-Turn Driving Directions
Step-by-step road directions between Joliet and Decatur.
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1
Start on the route
34 m · 10 sec
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2
Turn right onto Ottawa Street
1397 ft · 44 sec · Ottawa Street
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3
Continue on Ottawa Street
758 ft · 22 sec · Ottawa Street
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4
Continue on Chicago Street
2079 ft · 1 min · Chicago Street
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5
Take the ramp slight right toward I 80 West: Moline, Rock Island
1707 ft · 42 sec
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6
Merge slight left
6.4 mi · 8 min
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7
Take the exit slight right toward I 55 South: Saint Louis
1900 ft · 54 sec
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8
Merge slight left
93 mi · 1 hr 40 min
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9
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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10
Take the exit slight right toward US 51 South, US 51 Business North: Decatur, Bloomington
1616 ft · 40 sec
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11
Continue on North 1450 East Road
14.7 mi · 18 min · North 1450 East Road
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12
Continue on North Walnut Street
23.2 mi · 30 min · North Walnut Street
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13
Turn straight
4.7 mi · 8 min
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14
Turn left onto East Wood Street
91 m · 8 sec · East Wood Street
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15
Arrive at your destination
0 m · 1 sec · East Wood Street
Car Route Details
A richer read on the saved driving route between Joliet 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 55 South
Merge slight left
93 mi · 01h 40m
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 Joliet and Slight Chance Rain Showers 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 Joliet to Decatur?
The road trip is about 146 miles (235 km) and usually takes 02h 24m 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?
Chenoa is a useful midpoint, sitting about 72.9 miles from Joliet and 73.1 miles from Decatur.
How much longer is the road route than the straight-line distance?
The direct path is about 125 miles (201.2 km), while the road route adds roughly 21 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 $19.42 one way or $38.84 round trip. Estimated CO2 is about 45.8 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Joliet and Slight Chance Rain Showers then Chance Showers And Thunderstorms near Decatur.
Stop Ideas Near Chenoa
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 Chenoa.
Pontiac station
Uptown Station
Dwight station
Gilman
Flight Path Map
This map shows the direct air route between Joliet and Decatur. Straight-line distance: 125.04 mi (201.24 km).
#1 Joliet
The second most populous city in Will County, Illinois.
| Population | 85,583 |
| Coordinates | 41.5251900, -88.0834000 |
| Altitude | 165 |
| 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: 235 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 04h 51m |
| 40 mph (64.37 km/h) | 03h 39m |
| 50 mph (80.47 km/h) | 02h 55m |
| 60 mph (96.56 km/h) | 02h 26m |
| 70 mph (112.65 km/h) | 02h 05m |
| 80 mph (129 km/h) | 01h 49m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $19.42 | $38.84 |
| Mid-grade | $4.25 | $21.90 | $43.81 |
| Premium | $4.65 | $23.97 | $47.94 |
| Diesel | $5.30 | $27.32 | $54.63 |
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 04, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.