How far is Algonquin, IL from Decatur, IL?
The driving distance from Algonquin, IL to Decatur, IL is about 217.7 miles (350.3 km), with a travel time of about 03h 33m by car.
- The straight-line flight distance is about 164.3 miles (264.4 km).
- For a round trip, plan for roughly 07h 07m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 8:00 AM CDT.
Reverse, save, or send this route
This drive is better planned with a longer stop or an overnight stay. Copy the route link, send it to another device, or print a clean version before you head out.
This drive is better planned with a longer stop or an overnight stay.
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 03h 33m.
An early departure helps you fit a real stop into the day without turning the return into a late-night drive.
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 Livingston County, Illinois
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Sunny
Driving Route Map
The map below follows the saved road route between Algonquin and Decatur.
Turn-by-Turn Driving Directions
Step-by-step road directions between Algonquin and Decatur.
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1
Start on Washington Street
24 m · 7 sec · Washington Street
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2
Turn right onto South Main Street
669 ft · 27 sec · South Main Street
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3
Turn left onto Algonquin Bypass
59 m · 8 sec · Algonquin Bypass
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4
Continue on South Main Street
2091 ft · 52 sec · South Main Street
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5
Turn right onto Edgewood Road
1.6 km · 2 min · Edgewood Road
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6
Turn left onto Hanson Road
1284 ft · 31 sec · Hanson Road
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7
Turn right onto North County Line Road
1.6 km · 2 min · North County Line Road
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8
Turn left onto Randall Road
16.4 mi · 27 min · Randall Road
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9
Keep slight left to continue on North Randall Road
1.2 mi · 2 min · North Randall Road
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10
Continue on Randall Road
2.6 mi · 5 min · Randall Road
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11
Continue on North Randall Road
3.3 mi · 5 min · North Randall Road
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12
Turn right onto Orchard Road
11.2 mi · 19 min · Orchard Road
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13
Continue on Minkler Road
1.5 km · 2 min · Minkler Road
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14
Enter the roundabout and take exit 1 toward Minkler Road
39 m · 4 sec · Minkler Road
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15
Exit the roundabout onto Minkler Road
3.4 mi · 5 min · Minkler Road
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16
At the end of the road, turn right onto East Schoolhouse Road
2391 ft · 47 sec · East Schoolhouse Road
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17
Turn left onto Ashley Road
3.8 mi · 5 min · Ashley Road
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18
Turn right onto Caton Farm Road
1.5 mi · 2 min · Caton Farm Road
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19
Turn left
7.2 mi · 10 min
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20
Continue on North Bridge Street
1.3 mi · 2 min · North Bridge Street
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21
Continue straight
22.1 mi · 26 min
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22
Take the exit right toward I 55 South: Bloomington
1864 ft · 46 sec
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23
Merge slight left
62.4 mi · 1 hr 7 min
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24
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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25
Take the exit slight right toward US 51 South, US 51 Business North: Decatur, Bloomington
1616 ft · 40 sec
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26
Continue on North 1450 East Road
14.7 mi · 18 min · North 1450 East Road
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27
Continue on North Walnut Street
23.2 mi · 30 min · North Walnut Street
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28
Turn straight
4.7 mi · 8 min
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29
Turn left onto East Wood Street
91 m · 8 sec · East Wood Street
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30
Arrive at your destination
0 m · 1 sec · East Wood Street
Car Route Details
A richer read on the saved driving route between Algonquin and Decatur.
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
62.4 mi · 01h 07m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A longer out-and-back drive
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
Mostly Sunny leaving Algonquin and Sunny near Decatur.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Algonquin to Decatur?
The road trip is about 217.7 miles (350.3 km) and usually takes 03h 33m in normal driving conditions.
Is this a same-day trip or an overnight route?
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
What is the halfway point on this route?
Odell is a useful midpoint, sitting about 93 miles from Algonquin and 124.8 miles from Decatur.
How much longer is the road route than the straight-line distance?
The direct path is about 164.3 miles (264.4 km), while the road route adds roughly 53.4 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 6:00 AM to 8:00 AM CDT. If you want a more comfortable same-day return, try to leave by 9:52 AM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $28.96 one way or $57.92 round trip. Estimated CO2 is about 68.3 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Algonquin and Sunny near Decatur.
Stop Ideas Near Odell
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 Odell.
Dwight station
Pontiac station
Gilman
Kankakee
Flight Path Map
This map shows the direct air route between Algonquin and Decatur. Straight-line distance: 164.31 mi (264.43 km).
#1 Algonquin
Village in Illinois
| Population | 30,730 |
| Coordinates | 42.1655800, -88.2942500 |
| Altitude | 226 |
| 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: 350 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 07h 15m |
| 40 mph (64.37 km/h) | 05h 26m |
| 50 mph (80.47 km/h) | 04h 21m |
| 60 mph (96.56 km/h) | 03h 37m |
| 70 mph (112.65 km/h) | 03h 06m |
| 80 mph (129 km/h) | 02h 42m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $28.96 | $57.92 |
| Mid-grade | $4.25 | $32.66 | $65.33 |
| Premium | $4.65 | $35.74 | $71.49 |
| Diesel | $5.30 | $40.73 | $81.47 |
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.