How far is City of Janesville, WI from Star Prairie, WI?
The driving distance from City of Janesville, WI to Star Prairie, WI is about 281.9 miles (453.7 km), with a travel time of about 05h 16m by car.
- The straight-line flight distance is about 246.4 miles (396.5 km).
- For a round trip, plan for roughly 10h 32m 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 05h 16m.
An early departure helps you fit a real stop into the day without turning the return into a late-night drive.
This departure sits inside the recommended comfort window for the route.
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.
Showers And Thunderstorms Likely
Chance Rain And Snow Showers
Driving Route Map
The map below follows the saved road route between City of Janesville and Star Prairie.
Turn-by-Turn Driving Directions
Step-by-step road directions between City of Janesville and Star 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
61.3 mi · 1 hr 6 min
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7
Keep slight left
63.5 mi · 1 hr 8 min
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8
Keep slight right to continue on I 94 West: Eau Claire, Saint Paul
130.1 mi · 2 hr 20 min
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9
Take the exit slight right toward CTH T: Hammond
1547 ft · 38 sec
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10
Enter the roundabout and take exit 1 toward County Highway T
5 m · 1 sec · County Highway T
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11
Exit the roundabout onto County Highway T
2.7 mi · 6 min · County Highway T
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12
Continue on US-12
3040 ft · 48 sec · US-12
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13
Turn right onto County Highway T
10.1 mi · 14 min · County Highway T
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14
Turn left onto State Highway 64
4.7 mi · 7 min · State Highway 64
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15
Turn right onto State Highway 65
4.2 mi · 6 min · State Highway 65
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16
Turn right onto Main Street
867 ft · 20 sec · Main Street
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17
Turn right onto Bridge Avenue
24 m · 2 sec · Bridge Avenue
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18
Arrive at your destination
0 m · 1 sec · Bridge Avenue
Car Route Details
A richer read on the saved driving route between City of Janesville and Star Prairie.
Interchange-aware route
The drive includes several ramps, exits, or merges, so checking the next few maneuvers before busy interchanges is useful.
I 94 West
Keep slight right to continue on I 94 West: Eau Claire, Saint Paul
130 mi · 02h 20m
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.
Showers And Thunderstorms Likely leaving City of Janesville and Chance Rain And Snow Showers near Star 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 Star Prairie?
The road trip is about 281.9 miles (453.7 km) and usually takes 05h 16m 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 140.8 miles from City of Janesville and 141.1 miles from Star Prairie.
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 35.5 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 6:00 AM to 8:00 AM CDT. If you want a more comfortable same-day return, try to leave by 6:28 AM CDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $37.52 one way or $75.04 round trip. Estimated CO2 is about 88.4 kg one way.
What should you check before leaving?
Before you leave, expect Showers And Thunderstorms Likely around City of Janesville and Chance Rain And Snow Showers near Star Prairie.
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 City of Janesville and Star Prairie. Straight-line distance: 246.37 mi (396.49 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 Star Prairie
Village in St.
| Population | 3,640 |
| Coordinates | 45.1969100, -92.5307500 |
| Altitude | 284 |
| Country | United States |
End: Star Prairie (-92.53075, 45.19691)
Estimated Travel Time
Distance: 454 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 09h 23m |
| 40 mph (64.37 km/h) | 07h 02m |
| 50 mph (80.47 km/h) | 05h 38m |
| 60 mph (96.56 km/h) | 04h 41m |
| 70 mph (112.65 km/h) | 04h 01m |
| 80 mph (129 km/h) | 03h 31m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.77 | $37.52 | $75.04 |
| Mid-grade | $4.25 | $42.32 | $84.63 |
| Premium | $4.65 | $46.31 | $92.61 |
| Diesel | $5.30 | $52.77 | $105.55 |
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.