How far is Mercer, WI from West Allis, WI?
The driving distance from Mercer, WI to West Allis, WI is about 282.1 miles (454 km), with a travel time of about 04h 32m by car.
- The straight-line flight distance is about 239.9 miles (386.1 km).
- For a round trip, plan for roughly 09h 05m 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 32m.
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.
Civil town in Portage County, Wisconsin
Route Weather Snapshot
Check the forecast at both ends before you head out.
Partly Sunny
Chance Rain Showers
Driving Route Map
The map below follows the saved road route between Mercer and West Allis.
Turn-by-Turn Driving Directions
Step-by-step road directions between Mercer and West Allis.
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1
Start on US 51
32.8 mi · 49 min · US 51
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2
Continue on Oneida Street
71.1 mi · 1 hr 29 min · Oneida Street
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3
Keep slight left to continue on I 39 South, US 51 South: Stevens Point, Madison
22.5 mi · 24 min
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4
Continue straight
7.4 mi · 8 min
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5
Take the exit slight right toward US 10 East, WI 66 West: Stevens Point, Waupaca, Appleton
2035 ft · 58 sec
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6
Keep slight right to continue on US 10 East: Appleton, Waupaca
50.9 mi · 1 hr 1 min
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7
Keep slight right to continue on US 45 South: Oshkosh
12.3 mi · 14 min
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8
Take the exit slight left toward I 41 South: Milwaukee
1.1 mi · 1 min
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9
Merge slight left
80.8 mi · 1 hr 29 min
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10
Take the exit slight right toward I 94 East, I 94 West: Milwaukee, Madison
1381 ft · 34 sec
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11
Keep slight left to continue on I 94 East, I 43 South Alternate: Milwaukee
1.1 km · 1 min
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12
Keep slight right to continue on WI 181: 84th Street
1906 ft · 47 sec
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13
Keep slight right to continue on WI 181 South: 84th Street South, Milwaukee Mile Speedway, Pettit National Ice Center
59 m · 5 sec
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14
Turn right onto South 84th Street
1.1 km · 2 min · South 84th Street
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15
Turn left onto West Greenfield Avenue
2754 ft · 2 min · West Greenfield Avenue
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16
Arrive at your destination
0 m · 1 sec · West Greenfield Avenue
Car Route Details
A richer read on the saved driving route between Mercer and West Allis.
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 41 South
Merge slight left
80.8 mi · 01h 29m
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.
Partly Sunny leaving Mercer and Chance Rain Showers near West Allis.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Mercer to West Allis?
The road trip is about 282.1 miles (454 km) and usually takes 04h 32m 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?
Stockton is a useful midpoint, sitting about 140.9 miles from Mercer and 141.2 miles from West Allis.
How much longer is the road route than the straight-line distance?
The direct path is about 239.9 miles (386.1 km), while the road route adds roughly 42.2 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 7:54 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 Partly Sunny around Mercer and Chance Rain Showers near West Allis.
Stop Ideas Near Stockton
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 Stockton.
Stevens Point, WI
Stevens Point, Wisconsin
Wisconsin Rapids, WI
Waupaca, Wisconsin
Flight Path Map
This map shows the direct air route between Mercer and West Allis. Straight-line distance: 239.91 mi (386.09 km).
#1 Mercer
Civil town in Iron County, Wisconsin
| Population | 1,387 |
| Coordinates | 46.1655000, -90.0626600 |
| Altitude | 488 |
| Country | United States |
#2 West Allis
The most populous city in Milwaukee County, Wisconsin.
| Population | 59,748 |
| Coordinates | 43.0166800, -88.0070300 |
| Altitude | 222 |
| Country | United States |
End: West Greenfield Avenue (-88.007075, 43.01665)
Estimated Travel Time
Distance: 454 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 09h 24m |
| 40 mph (64.37 km/h) | 07h 03m |
| 50 mph (80.47 km/h) | 05h 38m |
| 60 mph (96.56 km/h) | 04h 42m |
| 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 · May 05, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.