How far is Somonauk, IL from Springfield, IL?
The driving distance from Somonauk, IL to Springfield, IL is about 164.3 miles (264.4 km), with a travel time of about 02h 38m by car.
- The straight-line flight distance is about 136.3 miles (219.3 km).
- For a round trip, plan for roughly 05h 16m 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 38m.
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.
City in Woodford County, Illinois
Route Weather Snapshot
Check the forecast at both ends before you head out.
Scattered Showers And Thunderstorms then Mostly Sunny
Driving Route Map
The map below follows the saved road route between Somonauk and Springfield.
Turn-by-Turn Driving Directions
Step-by-step road directions between Somonauk and Springfield.
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1
Start on West Church Street
17.4 mi · 26 min · West Church Street
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2
Continue on East 9th Road
2317 ft · 39 sec · East 9th Road
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3
Continue on North 44th Road
4.5 mi · 7 min · North 44th Road
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4
Take the ramp left toward I 39 South, US 51 South: LaSalle, Peru
1699 ft · 41 sec
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5
Merge slight left
71.2 mi · 1 hr 16 min
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6
Keep slight right to continue on I 55 South, US 51 South: Peoria, Champaign, Saint Louis, Decatur
7.6 mi · 8 min
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7
Keep slight right to continue on I 55 South: Saint Louis, Springfield
59.5 mi · 1 hr 4 min
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8
Take the exit slight right toward IL 97 West
2280 ft · 43 sec
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9
Merge slight left onto Clear Lake Avenue
2.1 mi · 4 min · Clear Lake Avenue
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10
Continue on East Jefferson Street
2261 ft · 1 min · East Jefferson Street
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11
Turn left onto North 7th Street
124 m · 19 sec · North 7th Street
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12
Turn left onto East Washington Street
768 ft · 24 sec · East Washington Street
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13
Arrive at your destination
0 m · 1 sec · East Washington Street
Car Route Details
A richer read on the saved driving route between Somonauk and Springfield.
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 South
Merge slight left
71.2 mi · 01h 16m
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.
Sunny leaving Somonauk and Scattered Showers And Thunderstorms then Mostly Sunny near Springfield.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Somonauk to Springfield?
The road trip is about 164.3 miles (264.4 km) and usually takes 02h 38m 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?
El Paso is a useful midpoint, sitting about 82 miles from Somonauk and 82.2 miles from Springfield.
How much longer is the road route than the straight-line distance?
The direct path is about 136.3 miles (219.3 km), while the road route adds roughly 28 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 1:14 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $21.87 one way or $43.74 round trip. Estimated CO2 is about 51.5 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Somonauk and Scattered Showers And Thunderstorms then Mostly Sunny near Springfield.
Stop Ideas Near El Paso
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
City Hall - Town of Normal
Normal Town
Minonk City Street Department
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to El Paso.
Uptown Station
Pontiac station
Peoria, Illinois
Dwight station
Flight Path Map
This map shows the direct air route between Somonauk and Springfield. Straight-line distance: 136.24 mi (219.25 km).
#1 Somonauk
City in Illinois, United States of America
| Population | 1,860 |
| Coordinates | 41.6336400, -88.6811900 |
| Altitude | 209 |
| Country | United States |
#2 Springfield
The capital of Illinois and the county seat of Sangamon County.
| Population | 113,671 |
| Coordinates | 39.8017200, -89.6437100 |
| Altitude | 182 |
| Country | United States |
End: East Washington Street (-89.643712, 39.801639)
Estimated Travel Time
Distance: 264 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 05h 28m |
| 40 mph (64.37 km/h) | 04h 06m |
| 50 mph (80.47 km/h) | 03h 17m |
| 60 mph (96.56 km/h) | 02h 44m |
| 70 mph (112.65 km/h) | 02h 20m |
| 80 mph (129 km/h) | 02h 02m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $21.87 | $43.74 |
| Mid-grade | $4.25 | $24.67 | $49.33 |
| Premium | $4.65 | $26.99 | $53.99 |
| Diesel | $5.30 | $30.76 | $61.53 |
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.