How far is Quincy, IL from Decatur, IL?
The driving distance from Quincy, IL to Decatur, IL is about 149.4 miles (240.5 km), with a travel time of about 02h 25m by car.
- The straight-line flight distance is about 130.3 miles (209.7 km).
- For a round trip, plan for roughly 04h 51m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 8:00 AM to 10:00 AM CST.
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.
City in Illinois, United States of America
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Partly Sunny then Slight Chance Showers And Thunderstorms
Driving Route Map
The map below follows the saved road route between Quincy and Decatur.
Turn-by-Turn Driving Directions
Step-by-step road directions between Quincy and Decatur.
-
1
Start on the route
16 m · 2 sec
-
2
Turn right onto Broadway Street
116 m · 36 sec · Broadway Street
-
3
Continue on Broadway Street
923 ft · 25 sec · Broadway Street
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4
Turn left onto North 3rd Street
2348 ft · 53 sec · North 3rd Street
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5
Continue on Gardner Expressway
11.3 mi · 20 min · Gardner Expressway
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6
Continue on East 1083rd Lane
578 ft · 12 sec · East 1083rd Lane
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7
Take the ramp right
2526 ft · 1 min
-
8
Merge slight left onto Chicago-Kansas City Expressway
2.8 mi · 3 min · Chicago-Kansas City Expressway
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9
Merge slight right
97.9 mi · 1 hr 45 min
-
10
Take the exit slight right toward I 72 East, US 36 East: Decatur
30 mi · 33 min
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11
Take the exit slight right toward US 36 East, US 51 South: Decatur, Pana
1656 ft · 41 sec
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12
Keep slight left to continue on US 36 East: Decatur
5.5 mi · 8 min
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13
Turn right onto North Main Street
1985 ft · 49 sec · North Main Street
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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 Quincy 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.
Chicago-Kansas City Expressway
Merge slight right
97.9 mi · 01h 45m
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 Quincy and Partly Sunny then Slight 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 Quincy to Decatur?
The road trip is about 149.4 miles (240.5 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?
South Jacksonville is a useful midpoint, sitting about 74.6 miles from Quincy and 74.8 miles from Decatur.
How much longer is the road route than the straight-line distance?
The direct path is about 130.3 miles (209.7 km), while the road route adds roughly 19.1 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 CST. If you want a more comfortable same-day return, try to leave by 1:38 PM CST.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $23.37 one way or $46.73 round trip. Estimated CO2 is about 46.8 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Quincy and Partly Sunny then Slight Chance Showers And Thunderstorms near Decatur.
Stop Ideas Near South Jacksonville
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 South Jacksonville.
Springfield station
Carlinville
Lincoln
Alton
Flight Path Map
This map shows the direct air route between Quincy and Decatur. Straight-line distance: 130.32 mi (209.73 km).
#1 Quincy
County seat of Adams County, Illinois, United States
| Population | 39,589 |
| Coordinates | 39.9356000, -91.4098700 |
| Altitude | 173 |
| 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: 241 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 04h 58m |
| 40 mph (64.37 km/h) | 03h 44m |
| 50 mph (80.47 km/h) | 02h 59m |
| 60 mph (96.56 km/h) | 02h 29m |
| 70 mph (112.65 km/h) | 02h 08m |
| 80 mph (129 km/h) | 01h 51m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.43 | $23.37 | $46.73 |
| Mid-grade | $5.05 | $26.60 | $53.21 |
| Premium | $5.61 | $29.56 | $59.13 |
| Diesel | $6.47 | $34.10 | $68.19 |
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 · Nov 11, 2026