How far is Decatur, IL from Ottawa, IL?
The driving distance from Decatur, IL to Ottawa, IL is about 125.5 miles (202 km), with a travel time of about 02h 28m by car.
- The straight-line flight distance is about 104.1 miles (167.6 km).
- For a round trip, plan for roughly 04h 57m 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 28m.
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.
Village in Woodford County, Illinois
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Partly Sunny
Driving Route Map
The map below follows the saved road route between Decatur and Ottawa.
Turn-by-Turn Driving Directions
Step-by-step road directions between Decatur and Ottawa.
-
1
Start on East Wood Street
155 m · 23 sec · East Wood Street
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2
Turn left onto South Franklin Street
2129 ft · 46 sec · South Franklin Street
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3
Continue on North Water Street
27.4 mi · 37 min · North Water Street
-
4
Continue on North 1450 East Road
14.7 mi · 18 min · North 1450 East Road
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5
Take the exit slight right toward I 74 West, US 51 North: Peoria, Rockford
8.9 mi · 10 min
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6
Take the exit slight right toward I 39 North: Rockford
59.6 mi · 1 hr 4 min
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7
Take the exit slight right toward I 80 East: Chicago
1 km · 57 sec
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8
Merge slight left
11.1 mi · 12 min
-
9
Take the exit slight right toward IL 23: De Kalb, Ottawa
1251 ft · 31 sec
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10
Turn right onto Columbus Street
1.7 mi · 3 min · Columbus Street
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11
Turn right onto West Superior Street
122 m · 16 sec · West Superior Street
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12
Turn left onto Clinton Street
2332 ft · 1 min · Clinton Street
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13
Turn left onto West Main Street
123 m · 12 sec · West Main Street
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14
Turn right onto La Salle Street
17 m · 2 sec · La Salle Street
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15
Arrive at your destination
0 m · 1 sec · La Salle Street
Car Route Details
A richer read on the saved driving route between Decatur and Ottawa.
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 39 North
Take the exit slight right toward I 39 North: Rockford
59.6 mi · 01h 04m
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 Decatur and Partly Sunny near Ottawa.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Decatur to Ottawa?
The road trip is about 125.5 miles (202 km) and usually takes 02h 28m 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?
Kappa is a useful midpoint, sitting about 62.8 miles from Decatur and 62.7 miles from Ottawa.
How much longer is the road route than the straight-line distance?
The direct path is about 104.1 miles (167.6 km), while the road route adds roughly 21.4 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 8:00 AM to 10:00 AM CDT. If you want a more comfortable same-day return, try to leave by 1:32 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $16.71 one way or $33.41 round trip. Estimated CO2 is about 39.4 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Decatur and Partly Sunny near Ottawa.
Stop Ideas Near Kappa
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
City Hall - Town of Normal
City of Bloomington, Illinois
El Paso City Water Works
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Kappa.
Uptown Station
Pontiac station
Peoria, Illinois
Lincoln
Flight Path Map
This map shows the direct air route between Decatur and Ottawa. Straight-line distance: 104.17 mi (167.65 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 Ottawa
City in Illinois, United States
| Population | 18,097 |
| Coordinates | 41.3455900, -88.8425800 |
| Altitude | 147 |
| Country | United States |
End: Ottawa (-88.84258, 41.34559)
Estimated Travel Time
Distance: 202 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 04h 10m |
| 40 mph (64.37 km/h) | 03h 08m |
| 50 mph (80.47 km/h) | 02h 30m |
| 60 mph (96.56 km/h) | 02h 05m |
| 70 mph (112.65 km/h) | 01h 47m |
| 80 mph (129 km/h) | 01h 33m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $16.71 | $33.41 |
| Mid-grade | $4.25 | $18.84 | $37.68 |
| Premium | $4.65 | $20.62 | $41.23 |
| Diesel | $5.30 | $23.50 | $46.99 |
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 29, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.