How far is Star Prairie, WI from City of Janesville, WI?
The driving distance from Star Prairie, WI to City of Janesville, WI is about 281.5 miles (453.1 km), with a travel time of about 04h 26m by car.
- The straight-line flight distance is about 246.4 miles (396.5 km).
- For a round trip, plan for roughly 08h 53m 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 26m.
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 Monroe County, Wisconsin, United States
Route Weather Snapshot
Check the forecast at both ends before you head out.
Chance Rain And Snow Showers
Showers And Thunderstorms Likely
Driving Route Map
The map below follows the saved road route between Star Prairie and City of Janesville.
Turn-by-Turn Driving Directions
Step-by-step road directions between Star Prairie and City of Janesville.
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1
Start on Bridge Avenue
24 m · 7 sec · Bridge Avenue
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2
Turn left onto Main Street
791 ft · 19 sec · Main Street
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3
At the end of the road, turn left onto State Highway 65
4.1 mi · 6 min · State Highway 65
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4
Turn slight left onto WIS 64 EAST
146 m · 22 sec
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5
Turn left onto State Highway 64
4.8 mi · 7 min · State Highway 64
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6
Turn right onto County Highway T
10.1 mi · 14 min · County Highway T
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7
At the end of the road, turn left onto US-12
3040 ft · 47 sec · US-12
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8
Continue on Davis Street
2.7 mi · 6 min · Davis Street
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9
Enter the roundabout and take exit 2 toward County Highway T
40 m · 3 sec · County Highway T
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10
Exit the roundabout onto County Highway T
148 m · 28 sec · County Highway T
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11
Enter the roundabout and take exit 2 toward I-94 Eastbound: Menomonie, Eau Claire
77 m · 15 sec
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12
Exit the roundabout onto I-94 Eastbound: Menomonie, Eau Claire
1591 ft · 39 sec
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13
Merge slight left
221.9 mi · 3 hr 58 min
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14
Keep slight right to continue on I 39, I 90: Chicago
33.1 mi · 35 min
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15
Take the exit slight right
1240 ft · 30 sec
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16
Keep slight right to continue on WI 26: State Highway 26
1117 ft · 32 sec
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17
Keep slight right to continue on WI 26 South: Janesville
126 m · 10 sec
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18
Turn slight right onto Milton Avenue
2.3 mi · 5 min · Milton Avenue
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19
Turn left onto East Memorial Drive
80 m · 12 sec · East Memorial Drive
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20
Continue on North Garfield Avenue
2552 ft · 2 min · North Garfield Avenue
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21
Turn right onto East Court Street
142 m · 16 sec · East Court Street
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22
Arrive at your destination
0 m · 1 sec · East Court Street
Car Route Details
A richer read on the saved driving route between Star 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-94 Eastbound
Merge slight left
222 mi · 03h 58m
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.
Chance Rain And Snow Showers leaving Star Prairie and 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 Star Prairie to City of Janesville?
The road trip is about 281.5 miles (453.1 km) and usually takes 04h 26m 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?
Warrens is a useful midpoint, sitting about 140.6 miles from Star Prairie and 140.9 miles from City of Janesville.
How much longer is the road route than the straight-line distance?
The direct path is about 246.4 miles (396.5 km), while the road route adds roughly 35.1 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 8:06 AM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $37.45 one way or $74.89 round trip. Estimated CO2 is about 88.2 kg one way.
What should you check before leaving?
Before you leave, expect Chance Rain And Snow Showers around Star Prairie and Showers And Thunderstorms Likely near City of Janesville.
Stop Ideas Near Warrens
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 Warrens.
Tomah
Wisconsin Rapids, WI
La Crosse
Wisconsin Dells
Flight Path Map
This map shows the direct air route between Star Prairie and City of Janesville. Straight-line distance: 246.37 mi (396.49 km).
#1 Star Prairie
Village in St.
| Population | 3,640 |
| Coordinates | 45.1969100, -92.5307500 |
| Altitude | 284 |
| 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: 453 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 09h 22m |
| 40 mph (64.37 km/h) | 07h 02m |
| 50 mph (80.47 km/h) | 05h 37m |
| 60 mph (96.56 km/h) | 04h 41m |
| 70 mph (112.65 km/h) | 04h 01m |
| 80 mph (129 km/h) | 03h 30m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $37.45 | $74.89 |
| Mid-grade | $4.25 | $42.23 | $84.46 |
| Premium | $4.65 | $46.21 | $92.43 |
| Diesel | $5.30 | $52.67 | $105.34 |
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 · Apr 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.