How far is Monmouth, IL from Niles, IL?
The driving distance from Monmouth, IL to Niles, IL is about 215.5 miles (346.8 km), with a travel time of about 03h 25m by car.
- The straight-line flight distance is about 166 miles (267.1 km).
- For a round trip, plan for roughly 06h 50m 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 25m.
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 Lee County, Illinois, United States of America
Route Weather Snapshot
Check the forecast at both ends before you head out.
Chance Showers And Thunderstorms
Rain Showers
Driving Route Map
The map below follows the saved road route between Monmouth and Niles.
Turn-by-Turn Driving Directions
Step-by-step road directions between Monmouth and Niles.
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1
Start on South 1st Street
65 m · 15 sec · South 1st Street
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2
Turn left onto East Broadway
89 m · 8 sec · East Broadway
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3
Enter the roundabout and take exit 1 toward Public Square
5 m · 1 sec · North Main Street
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4
Exit the rotary onto North Main Street
1.4 km · 2 min · North Main Street
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5
Take the ramp slight right
84 m · 8 sec
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6
Merge slight left onto Chicago-Kansas City Expressway
18.9 mi · 22 min · Chicago-Kansas City Expressway
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7
Keep slight right to continue on Chicago-Kansas City Expressway
31.9 mi · 35 min · Chicago-Kansas City Expressway
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8
Keep slight left to continue on Chicago-Kansas City Expressway
6.3 mi · 7 min · Chicago-Kansas City Expressway
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9
Take the exit slight right toward I 88 East, IL 92 East: Sterling, Rock Falls
135 mi · 2 hr 29 min
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10
Keep slight right to continue on Ronald Reagan Memorial Tollway
4.7 mi · 6 min · Ronald Reagan Memorial Tollway
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11
Take the exit slight right toward I 294 North, I 290 West: Milwaukee, Rockford
3128 ft · 1 min
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12
Keep slight left to continue on I 294 Toll North: O'Hare International Airport, Milwaukee
1156 ft · 28 sec
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13
Merge slight left onto Tri-State Tollway
9.9 mi · 13 min · Tri-State Tollway
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14
Take the exit slight right toward Touhy Avenue
635 ft · 16 sec
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15
Keep slight left to continue on Touhy Avenue
2694 ft · 1 min
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16
Keep slight right to continue on Touhy Avenue East
1749 ft · 43 sec
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17
Turn straight onto East Touhy Avenue
3 mi · 6 min · East Touhy Avenue
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18
Turn left onto North Harlem Avenue
2643 ft · 50 sec · North Harlem Avenue
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19
Turn right onto West Howard Street
1019 ft · 24 sec · West Howard Street
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20
Turn right onto North Waukegan Road
4 m · 1 sec · North Waukegan Road
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21
Arrive at your destination
0 m · 1 sec · North Waukegan Road
Car Route Details
A richer read on the saved driving route between Monmouth and Niles.
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 88 East
Take the exit slight right toward I 88 East, IL 92 East: Sterling, Rock Falls
135 mi · 02h 29m
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.
Chance Showers And Thunderstorms leaving Monmouth and Rain Showers near Niles.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Monmouth to Niles?
The road trip is about 215.5 miles (346.8 km) and usually takes 03h 25m 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?
Nelson is a useful midpoint, sitting about 106.5 miles from Monmouth and 109 miles from Niles.
How much longer is the road route than the straight-line distance?
The direct path is about 166 miles (267.1 km), while the road route adds roughly 49.5 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 10:10 AM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $35.45 one way or $70.91 round trip. Estimated CO2 is about 67.5 kg one way.
What should you check before leaving?
Before you leave, expect Chance Showers And Thunderstorms around Monmouth and Rain Showers near Niles.
Stop Ideas Near Nelson
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 Nelson.
Princeton
Mendota station
Kewanee
Rockford, Illinois
Flight Path Map
This map shows the direct air route between Monmouth and Niles. Straight-line distance: 165.96 mi (267.08 km).
#1 Monmouth
City in Warren County, Illinois, United States
| Population | 8,801 |
| Coordinates | 40.9114300, -90.6473600 |
| Altitude | 232 |
| Country | United States |
#2 Niles
City in Trumbull County, Ohio
| Population | 28,615 |
| Coordinates | 42.0189200, -87.8028400 |
| Altitude | 194 |
| Country | United States |
End: West Howard Street (-87.802809, 42.018948)
Estimated Travel Time
Distance: 347 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 07h 10m |
| 40 mph (64.37 km/h) | 05h 23m |
| 50 mph (80.47 km/h) | 04h 18m |
| 60 mph (96.56 km/h) | 03h 35m |
| 70 mph (112.65 km/h) | 03h 04m |
| 80 mph (129 km/h) | 02h 41m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.67 | $35.45 | $70.91 |
| Mid-grade | $5.29 | $40.22 | $80.44 |
| Premium | $5.84 | $44.36 | $88.72 |
| Diesel | $6.57 | $49.94 | $99.88 |
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 · Oct 15, 2026