How far is Antioch, IL from Decatur, IL?
The driving distance from Antioch, IL to Decatur, IL is about 232.6 miles (374.4 km), with a travel time of about 04h 01m by car.
- The straight-line flight distance is about 187.6 miles (301.9 km).
- For a round trip, plan for roughly 08h 02m 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 04h 01m.
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.
Village in Illinois, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Slight Chance Showers And Thunderstorms then Mostly Sunny
Driving Route Map
The map below follows the saved road route between Antioch and Decatur.
Turn-by-Turn Driving Directions
Step-by-step road directions between Antioch and Decatur.
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1
Start on Main Street
2412 ft · 45 sec · Main Street
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2
Turn left onto West IL Route 173
6.6 mi · 10 min · West IL Route 173
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3
Take the ramp slight right toward I 94 Toll East: Chicago
2142 ft · 52 sec
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4
Merge slight left onto Tri-State Tollway
22.3 mi · 25 min · Tri-State Tollway
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5
Keep slight right to continue on Tri-State Tollway
22.7 mi · 29 min · Tri-State Tollway
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6
Keep slight left to continue on Tri-State Tollway
4.8 mi · 6 min · Tri-State Tollway
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7
Keep slight right to continue on Tri-State Tollway
1.2 mi · 1 min · Tri-State Tollway
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8
Take the exit slight right toward I 55: Chicago, St. Louis
1 km · 1 min
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9
Keep slight right to continue on I 55 South: Saint Louis
2295 ft · 56 sec
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10
Merge slight left onto Adlai Stevenson Expressway
119.4 mi · 2 hr 13 min · Adlai Stevenson Expressway
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11
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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12
Take the exit slight right toward US 51 South, US 51 Business North: Decatur, Bloomington
1616 ft · 40 sec
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13
Continue on North 1450 East Road
14.7 mi · 18 min · North 1450 East Road
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14
Continue on North Walnut Street
23.2 mi · 30 min · North Walnut Street
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15
Turn straight
4.7 mi · 8 min
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16
Turn left onto East Wood Street
91 m · 8 sec · East Wood Street
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17
Arrive at your destination
0 m · 1 sec · East Wood Street
Car Route Details
A richer read on the saved driving route between Antioch and Decatur.
Interchange-aware route
The drive includes several ramps, exits, or merges, so checking the next few maneuvers before busy interchanges is useful.
Adlai Stevenson Expressway
Merge slight left onto Adlai Stevenson Expressway
119 mi · 02h 13m
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.
Sunny leaving Antioch and Slight Chance Showers And Thunderstorms then Mostly Sunny near Decatur.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Antioch to Decatur?
The road trip is about 232.6 miles (374.4 km) and usually takes 04h 01m 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?
Gardner is a useful midpoint, sitting about 112 miles from Antioch and 120.7 miles from Decatur.
How much longer is the road route than the straight-line distance?
The direct path is about 187.6 miles (301.9 km), while the road route adds roughly 45 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 8:58 AM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $30.96 one way or $61.92 round trip. Estimated CO2 is about 73 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Antioch and Slight Chance Showers And Thunderstorms then Mostly Sunny near Decatur.
Stop Ideas Near Gardner
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 Gardner.
Dwight station
Kankakee
Joliet Transportation Center
Pontiac station
Flight Path Map
This map shows the direct air route between Antioch and Decatur. Straight-line distance: 187.59 mi (301.9 km).
#1 Antioch
Town in the American state of Illinois
| Population | 14,174 |
| Coordinates | 42.4772400, -88.0956400 |
| Altitude | 239 |
| 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: 374 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 07h 45m |
| 40 mph (64.37 km/h) | 05h 49m |
| 50 mph (80.47 km/h) | 04h 39m |
| 60 mph (96.56 km/h) | 03h 52m |
| 70 mph (112.65 km/h) | 03h 19m |
| 80 mph (129 km/h) | 02h 54m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $30.96 | $61.92 |
| Mid-grade | $4.25 | $34.92 | $69.83 |
| Premium | $4.65 | $38.21 | $76.42 |
| Diesel | $5.30 | $43.55 | $87.09 |
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.