How far is Peoria, IL from Somonauk, IL?
The driving distance from Peoria, IL to Somonauk, IL is about 107.1 miles (172.3 km), with a travel time of about 02h 14m by car.
- The straight-line flight distance is about 80.3 miles (129.2 km).
- For a round trip, plan for roughly 04h 29m 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 14m.
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 Illinois
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Peoria and Somonauk.
Turn-by-Turn Driving Directions
Step-by-step road directions between Peoria and Somonauk.
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1
Start on Northeast Jefferson Avenue
26 m · 9 sec · Northeast Jefferson Avenue
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2
Turn left onto Hamilton Boulevard
142 m · 20 sec · Hamilton Boulevard
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3
Turn left onto Northeast Adams Street
2.6 mi · 5 min · Northeast Adams Street
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4
Continue on Northeast Adams Street
1568 ft · 41 sec · Northeast Adams Street
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5
Continue on North Galena Road
7.1 mi · 10 min · North Galena Road
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6
Keep slight left
98 m · 4 sec
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7
Keep slight right
45 m · 2 sec
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8
Continue on North Galena Road
2326 ft · 36 sec · North Galena Road
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9
Continue on North State Route 29
6.1 mi · 8 min · North State Route 29
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10
Continue on South 4th Street
9.1 mi · 11 min · South 4th Street
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11
Continue on Railroad Street
1.1 mi · 1 min · Railroad Street
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12
Continue on County Road 1400 East
17.8 mi · 20 min · County Road 1400 East
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13
Merge slight right
8.9 mi · 10 min
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14
Keep slight right to continue on I 80 East: Joliet
2040 ft · 44 sec
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15
Merge slight left
17.4 mi · 19 min
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16
Take the exit slight right toward I 39 North, US 51 North: Rockford
2555 ft · 1 min
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17
Merge slight left
12.8 mi · 14 min
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18
Take the exit slight right toward US 34: Mendota, Earlville
1790 ft · 46 sec
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19
Turn right onto North 43rd Road
4.2 mi · 6 min · North 43rd Road
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20
Continue on East 9th Road
2317 ft · 39 sec · East 9th Road
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21
Continue on North 4450th Road
17.4 mi · 26 min · North 4450th Road
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22
Arrive at your destination
0 m · 1 sec · West Church Street
Car Route Details
A richer read on the saved driving route between Peoria and Somonauk.
Interchange-aware route
The drive includes several ramps, exits, or merges, so checking the next few maneuvers before busy interchanges is useful.
County Road 1400 East
Continue on County Road 1400 East
17.8 mi · 00h 20m
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.
Partly Sunny leaving Peoria and Mostly Sunny near Somonauk.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Peoria to Somonauk?
The road trip is about 107.1 miles (172.3 km) and usually takes 02h 14m 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?
Malden is a useful midpoint, sitting about 53.5 miles from Peoria and 53.6 miles from Somonauk.
How much longer is the road route than the straight-line distance?
The direct path is about 80.3 miles (129.2 km), while the road route adds roughly 26.8 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 2:00 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $14.25 one way or $28.51 round trip. Estimated CO2 is about 33.6 kg one way.
What should you check before leaving?
Before you leave, expect Partly Sunny around Peoria and Mostly Sunny near Somonauk.
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 Peoria and Somonauk. Straight-line distance: 80.3 mi (129.23 km).
#1 Peoria
The third most populous city in Illinois.
| Population | 109,428 |
| Coordinates | 40.6936500, -89.5889900 |
| Altitude | 153 |
| Country | United States |
#2 Somonauk
City in Illinois, United States of America
| Population | 1,860 |
| Coordinates | 41.6336400, -88.6811900 |
| Altitude | 209 |
| Country | United States |
End: Somonauk (-88.68119, 41.63364)
Estimated Travel Time
Distance: 172 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 03h 33m |
| 40 mph (64.37 km/h) | 02h 40m |
| 50 mph (80.47 km/h) | 02h 08m |
| 60 mph (96.56 km/h) | 01h 47m |
| 70 mph (112.65 km/h) | 01h 31m |
| 80 mph (129 km/h) | 01h 20m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $14.25 | $28.51 |
| Mid-grade | $4.25 | $16.08 | $32.15 |
| Premium | $4.65 | $17.59 | $35.18 |
| Diesel | $5.30 | $20.05 | $40.10 |
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.