How far is Des Plaines, IL from Mahomet, IL?
The driving distance from Des Plaines, IL to Mahomet, IL is about 154.5 miles (248.6 km), with a travel time of about 03h 01m by car.
- The straight-line flight distance is about 129.9 miles (209 km).
- For a round trip, plan for roughly 06h 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 03h 01m.
An early departure helps you fit a real stop into the day without turning the return into a late-night drive.
This departure sits inside the recommended comfort window for the route.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
Township in Kankakee County, Illinois
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Des Plaines and Mahomet.
Turn-by-Turn Driving Directions
Step-by-step road directions between Des Plaines and Mahomet.
-
1
Start on Henry Avenue
557 ft · 25 sec · Henry Avenue
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2
Turn right onto South Des Plaines River Road
1.8 mi · 3 min · South Des Plaines River Road
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3
Take the ramp slight right toward I 294 South: Indiana
2265 ft · 55 sec
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4
Merge slight left onto Tri-State Tollway
11.5 mi · 15 min · Tri-State Tollway
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5
Keep slight left to continue on Tri-State Tollway
4.8 mi · 6 min · Tri-State Tollway
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6
Keep slight right to continue on Tri-State Tollway
3.5 mi · 4 min · Tri-State Tollway
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7
Continue on Mile-Long Bridge
1.5 km · 1 min · Mile-Long Bridge
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8
Continue on Tri-State Tollway
8.5 mi · 11 min · Tri-State Tollway
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9
Take the exit slight right toward IL 50 South, IL 83: Cicero Avenue, 127th Street
1162 ft · 28 sec
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10
Keep slight left to continue on IL 50 South: Cicero Avenue
2529 ft · 1 min
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11
Turn straight onto Cicero Avenue
4.9 mi · 8 min · Cicero Avenue
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12
Turn left onto 167th Street
855 ft · 26 sec · 167th Street
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13
Take the ramp slight right toward I 57 South: Kankakee, I-80
3048 ft · 1 min
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14
Merge slight left
108.6 mi · 1 hr 58 min
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15
Take the exit slight right toward I 74 West: Peoria
2125 ft · 1 min
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16
Merge slight left
6.6 mi · 7 min
-
17
Take the exit slight right toward IL 47: Gibson City, Mahomet
1702 ft · 43 sec
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18
Turn left onto County Road 400 East
142 m · 11 sec · County Road 400 East
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19
Continue on North Lombard Street
1785 ft · 51 sec · North Lombard Street
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20
Turn right onto East Main Street
1270 ft · 56 sec · East Main Street
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21
Arrive at your destination
0 m · 1 sec · East Main Street
Car Route Details
A richer read on the saved driving route between Des Plaines and Mahomet.
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 57 South
Merge slight left
109 mi · 01h 58m
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 Des Plaines and Mostly Sunny near Mahomet.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Des Plaines to Mahomet?
The road trip is about 154.5 miles (248.6 km) and usually takes 03h 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?
Otto is a useful midpoint, sitting about 77.2 miles from Des Plaines and 77.2 miles from Mahomet.
How much longer is the road route than the straight-line distance?
The direct path is about 129.9 miles (209 km), while the road route adds roughly 24.6 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 10:58 AM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $20.55 one way or $41.10 round trip. Estimated CO2 is about 48.4 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Des Plaines and Mostly Sunny near Mahomet.
Stop Ideas Near Otto
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 Otto.
Kankakee
Gilman
Dwight station
Joliet Transportation Center
Flight Path Map
This map shows the direct air route between Des Plaines and Mahomet. Straight-line distance: 129.86 mi (208.99 km).
#1 Des Plaines
The most populous city in Cook County, Illinois.
| Population | 58,179 |
| Coordinates | 42.0333600, -87.8834000 |
| Altitude | 193 |
| Country | United States |
#2 Mahomet
Village in Illinois, United States
| Population | 8,968 |
| Coordinates | 40.1953100, -88.4042200 |
| Altitude | 223 |
| Country | United States |
End: Mahomet (-88.40422, 40.19531)
Estimated Travel Time
Distance: 249 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 05h 08m |
| 40 mph (64.37 km/h) | 03h 51m |
| 50 mph (80.47 km/h) | 03h 05m |
| 60 mph (96.56 km/h) | 02h 34m |
| 70 mph (112.65 km/h) | 02h 12m |
| 80 mph (129 km/h) | 01h 55m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $20.55 | $41.10 |
| Mid-grade | $4.25 | $23.18 | $46.36 |
| Premium | $4.65 | $25.36 | $50.73 |
| Diesel | $5.30 | $28.91 | $57.81 |
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.