How far is City of Janesville, WI from Sun Prairie, WI?
The driving distance from City of Janesville, WI to Sun Prairie, WI is about 40.5 miles (65.1 km), with a travel time of about 00h 54m by car.
- The straight-line flight distance is about 35.9 miles (57.7 km).
- For a round trip, plan for roughly 01h 49m 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 54m.
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 then Showers And Thunderstorms Likely
Chance Showers And Thunderstorms
Driving Route Map
The map below follows the saved road route between City of Janesville and Sun Prairie.
Turn-by-Turn Driving Directions
Step-by-step road directions between City of Janesville and Sun Prairie.
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1
Start on East Court Street
45 m · 6 sec · East Court Street
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2
Turn right onto Harrison Street
156 m · 27 sec · Harrison Street
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3
Turn left onto East Milwaukee Street
841 ft · 21 sec · East Milwaukee Street
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4
Turn sharp right onto Milton Avenue
3.1 mi · 7 min · Milton Avenue
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5
Take the exit slight left
1.3 km · 2 min
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6
Merge slight left
22.9 mi · 25 min
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7
Take the exit slight right toward CTH N: Stoughton, Cottage Grove
1567 ft · 38 sec
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8
Keep slight right
107 m · 9 sec
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9
Turn straight onto County Highway N
4.8 mi · 7 min · County Highway N
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10
Continue on South Main Street
1.8 mi · 3 min · South Main Street
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11
Continue on County Highway N
1.2 km · 1 min · County Highway N
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12
Enter the roundabout and take exit 2 toward County Highway N
30 m · 2 sec · County Highway N
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13
Exit the roundabout onto County Highway N
156 m · 9 sec · County Highway N
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14
Enter the roundabout and take exit 1 toward County Highway N
27 m · 2 sec · County Highway N
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15
Exit the roundabout onto County Highway N
150 m · 9 sec · County Highway N
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16
Enter the roundabout and take exit 2 toward County Highway N
29 m · 2 sec · County Highway N
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17
Exit the roundabout onto County Highway N
5 mi · 8 min · County Highway N
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18
Turn left onto East Main Street
2259 ft · 1 min · East Main Street
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19
Turn right onto North Bristol Street
38 m · 10 sec · North Bristol Street
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20
Turn left
12 m · 3 sec
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21
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between City of Janesville and Sun Prairie.
Turn-heavy local drive
The route has frequent decision points for its length, so lane choice and turn timing will matter more than cruising speed.
Milton Avenue
Merge slight left
22.9 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 then Showers And Thunderstorms Likely leaving City of Janesville and Chance Showers And Thunderstorms near Sun Prairie.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from City of Janesville to Sun Prairie?
The road trip is about 40.5 miles (65.1 km) and usually takes 00h 54m 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 20.3 miles from City of Janesville and 20.2 miles from Sun Prairie.
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 4.6 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 4:40 PM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $5.39 one way or $10.79 round trip. Estimated CO2 is about 12.7 kg one way.
What should you check before leaving?
Before you leave, expect Chance Showers And Thunderstorms then Showers And Thunderstorms Likely around City of Janesville and Chance Showers And Thunderstorms near Sun Prairie.
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 City of Janesville and Sun Prairie. Straight-line distance: 35.86 mi (57.71 km).
#1 City of Janesville
The most populous city in Rock County, Wisconsin.
| Population | 64,128 |
| Coordinates | 42.6857000, -89.0138500 |
| Altitude | 261 |
| Country | United States |
#2 Sun Prairie
Third-class city in Dane County, Wisconsin
| Population | 2,473 |
| Coordinates | 43.1836000, -89.2137300 |
| Altitude | 292 |
| Country | United States |
End: Sun Prairie (-89.21373, 43.1836)
Estimated Travel Time
Distance: 65 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 20m |
| 40 mph (64.37 km/h) | 01h 00m |
| 50 mph (80.47 km/h) | 00h 48m |
| 60 mph (96.56 km/h) | 00h 40m |
| 70 mph (112.65 km/h) | 00h 34m |
| 80 mph (129 km/h) | 00h 30m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $5.39 | $10.79 |
| Mid-grade | $4.25 | $6.08 | $12.16 |
| Premium | $4.65 | $6.66 | $13.31 |
| Diesel | $5.30 | $7.58 | $15.17 |
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.