How far is Chicago, IL from Monmouth, IL?
The driving distance from Chicago, IL to Monmouth, IL is about 210.9 miles (339.4 km), with a travel time of about 04h 01m by car.
- The straight-line flight distance is about 168.4 miles (271 km).
- For a round trip, plan for roughly 08h 03m 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
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Slight Chance Showers And Thunderstorms then Mostly Cloudy
Driving Route Map
The map below follows the saved road route between Chicago and Monmouth.
Turn-by-Turn Driving Directions
Step-by-step road directions between Chicago and Monmouth.
-
1
Start on the route
943 ft · 1 min
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2
At the end of the road, turn right onto West Cermak Road
947 ft · 26 sec · West Cermak Road
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3
Turn left onto South Halsted Street
737 ft · 17 sec · South Halsted Street
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4
Turn right onto South Canalport Avenue
87 m · 6 sec · South Canalport Avenue
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5
Turn slight right
34 m · 5 sec
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6
Take the ramp straight toward I 90 East, I 94 East
139 m · 11 sec
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7
Keep slight right to continue on I 55: Saint Louis, Lake Shore Drive
1820 ft · 44 sec
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8
Keep slight right to continue on I 55 South: St Louis
2604 ft · 1 min
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9
Merge slight left onto Stevenson Expressway
5.6 mi · 8 min · Stevenson Expressway
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10
Continue on Adlai E Stevenson Expressway
1739 ft · 27 sec · Adlai E Stevenson Expressway
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11
Continue on Adlai Stevenson Expressway
35.2 mi · 45 min · Adlai Stevenson Expressway
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12
Take the exit slight right toward I 80 West: Iowa
1.3 km · 1 min
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13
Merge slight left
115.1 mi · 2 hr 3 min
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14
Keep slight left to continue on I 74 West, I 280 West: Moline, Rock Island
2553 ft · 31 sec
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15
Take the exit slight right toward I 74 East: Peoria
1427 ft · 49 sec
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16
Merge slight left onto Chicago-Kansas City Expressway
158 m · 6 sec · Chicago-Kansas City Expressway
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17
Keep slight left to continue on Chicago-Kansas City Expressway
31.3 mi · 34 min · Chicago-Kansas City Expressway
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18
Take the exit slight right toward US 34 West: Monmouth
19.1 mi · 23 min
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19
Turn left onto North Main Street
1.5 km · 2 min · North Main Street
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20
Enter the roundabout and take exit 3 toward Public Square
94 m · 6 sec · East Broadway
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21
Exit the rotary onto East Broadway
90 m · 10 sec · East Broadway
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22
Turn right onto South 1st Street
65 m · 9 sec · South 1st Street
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23
Arrive at your destination
0 m · 1 sec · South 1st Street
Car Route Details
A richer read on the saved driving route between Chicago and Monmouth.
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 80 West
Merge slight left
115 mi · 02h 03m
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 Chicago and Slight Chance Showers And Thunderstorms then Mostly Cloudy near Monmouth.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Chicago to Monmouth?
The road trip is about 210.9 miles (339.4 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?
Malden is a useful midpoint, sitting about 105.3 miles from Chicago and 105.6 miles from Monmouth.
How much longer is the road route than the straight-line distance?
The direct path is about 168.4 miles (271 km), while the road route adds roughly 42.5 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 8:56 AM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $28.06 one way or $56.11 round trip. Estimated CO2 is about 66.1 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Chicago and Slight Chance Showers And Thunderstorms then Mostly Cloudy near Monmouth.
Stop Ideas Near Malden
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 Malden.
Princeton
Mendota station
Kewanee
Plano
Flight Path Map
This map shows the direct air route between Chicago and Monmouth. Straight-line distance: 168.37 mi (270.96 km).
#1 Chicago
The third most populous city in the United States and the center of the Chicago metropolitan area.
| Population | 2,677,643 |
| Coordinates | 41.850033, -87.6500523 |
| Altitude | 179 |
| Country | United States |
#2 Monmouth
City in Warren County, Illinois, United States
| Population | 8,801 |
| Coordinates | 40.9114300, -90.6473600 |
| Altitude | 232 |
| Country | United States |
End: Monmouth (-90.64736, 40.91143)
Estimated Travel Time
Distance: 339 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 07h 01m |
| 40 mph (64.37 km/h) | 05h 16m |
| 50 mph (80.47 km/h) | 04h 13m |
| 60 mph (96.56 km/h) | 03h 30m |
| 70 mph (112.65 km/h) | 03h 00m |
| 80 mph (129 km/h) | 02h 37m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $28.06 | $56.11 |
| Mid-grade | $4.25 | $31.64 | $63.28 |
| Premium | $4.65 | $34.63 | $69.25 |
| Diesel | $5.30 | $39.46 | $78.92 |
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 · May 31, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.