How far is Sun Prairie, WI from City of Janesville, WI?
The driving distance from Sun Prairie, WI to City of Janesville, WI is about 46.4 miles (74.7 km), with a travel time of about 00h 51m by car.
- The straight-line flight distance is about 35.9 miles (57.7 km).
- For a round trip, plan for roughly 01h 43m 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 00h 51m.
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 Dane County, Wisconsin
Route Weather Snapshot
Check the forecast at both ends before you head out.
Chance Showers And Thunderstorms
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
Driving Route Map
The map below follows the saved road route between Sun Prairie and City of Janesville.
Turn-by-Turn Driving Directions
Step-by-step road directions between Sun Prairie and City of Janesville.
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1
Start on the route
12 m · 5 sec
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2
Turn right onto North Bristol Street
38 m · 12 sec · North Bristol Street
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3
Turn left onto East Main Street
2259 ft · 1 min · East Main Street
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4
Turn right onto County Highway N
5 mi · 7 min · County Highway N
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5
Enter the roundabout and take exit 2 toward County Highway N
26 m · 2 sec · County Highway N
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6
Exit the roundabout onto County Highway N
152 m · 8 sec · County Highway N
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7
Enter the roundabout and take exit 2 toward County Highway N
30 m · 2 sec · County Highway N
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8
Exit the roundabout onto County Highway N
156 m · 9 sec · County Highway N
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9
Enter the roundabout and take exit 1 toward County Highway N
28 m · 2 sec · County Highway N
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10
Exit the roundabout onto County Highway N
1.2 km · 1 min · County Highway N
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11
Continue on North Main Street
1.8 mi · 3 min · North Main Street
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12
Continue on County Highway N
4.8 mi · 7 min · County Highway N
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13
Enter the roundabout and take exit 2 toward County Highway N
57 m · 5 sec · County Highway N
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14
Exit the roundabout onto County Highway N
605 ft · 11 sec · County Highway N
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15
Enter the roundabout and take exit 2 toward I 39 South, I 90 East: Janesville
100 m · 8 sec
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16
Exit the roundabout onto I 39 South, I 90 East: Janesville
1663 ft · 41 sec
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17
Merge slight left
23.2 mi · 25 min
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18
Take the exit slight right
1240 ft · 30 sec
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19
Keep slight right to continue on WI 26: State Highway 26
1117 ft · 32 sec
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20
Keep slight right to continue on WI 26 South: Janesville
126 m · 10 sec
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21
Turn slight right onto Milton Avenue
2.3 mi · 5 min · Milton Avenue
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22
Turn left onto East Memorial Drive
80 m · 12 sec · East Memorial Drive
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23
Continue on North Garfield Avenue
2552 ft · 2 min · North Garfield Avenue
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24
Turn right onto East Court Street
142 m · 16 sec · East Court Street
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25
Arrive at your destination
0 m · 1 sec · East Court Street
Car Route Details
A richer read on the saved driving route between Sun Prairie and City of Janesville.
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
23.2 mi · 00h 25m
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.
Chance Showers And Thunderstorms leaving Sun Prairie and Chance Showers And Thunderstorms then Showers And Thunderstorms Likely near City of Janesville.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Sun Prairie to City of Janesville?
The road trip is about 46.4 miles (74.7 km) and usually takes 00h 51m 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?
Rockdale is a useful midpoint, sitting about 20.1 miles from Sun Prairie and 26.3 miles from City of Janesville.
How much longer is the road route than the straight-line distance?
The direct path is about 35.9 miles (57.7 km), while the road route adds roughly 10.5 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 8:00 AM to 10:00 AM CDT. If you want a more comfortable same-day return, try to leave by 4:46 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $6.18 one way or $12.37 round trip. Estimated CO2 is about 14.6 kg one way.
What should you check before leaving?
Before you leave, expect Chance Showers And Thunderstorms around Sun Prairie and Chance Showers And Thunderstorms then Showers And Thunderstorms Likely near City of Janesville.
Stop Ideas Near Rockdale
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 Rockdale.
Madison (South), Wisconsin
Janesville, Wisconsin
Madison, Wisconsin
Columbus
Flight Path Map
This map shows the direct air route between Sun Prairie and City of Janesville. Straight-line distance: 35.86 mi (57.71 km).
#1 Sun Prairie
Third-class city in Dane County, Wisconsin
| Population | 2,473 |
| Coordinates | 43.1836000, -89.2137300 |
| Altitude | 292 |
| Country | United States |
#2 City of Janesville
The most populous city in Rock County, Wisconsin.
| Population | 64,128 |
| Coordinates | 42.6857000, -89.0138500 |
| Altitude | 261 |
| Country | United States |
End: East Court Street (-89.013903, 42.685777)
Estimated Travel Time
Distance: 75 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 32m |
| 40 mph (64.37 km/h) | 01h 09m |
| 50 mph (80.47 km/h) | 00h 55m |
| 60 mph (96.56 km/h) | 00h 46m |
| 70 mph (112.65 km/h) | 00h 39m |
| 80 mph (129 km/h) | 00h 34m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $6.18 | $12.37 |
| Mid-grade | $4.25 | $6.97 | $13.95 |
| Premium | $4.65 | $7.63 | $15.27 |
| Diesel | $5.30 | $8.70 | $17.40 |
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 Wisconsin · May 18, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.