How far is Erie, PA from Williamstown, PA?
The driving distance from Erie, PA to Williamstown, PA is about 170.5 miles (274.4 km), with a travel time of about 03h 34m by car.
- The straight-line flight distance is about 148.6 miles (239.1 km).
- For a round trip, plan for roughly 07h 09m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 8:00 AM EDT.
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 03h 34m.
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.
Borough of Pennsylvania
Route Weather Snapshot
Check the forecast at both ends before you head out.
Chance Rain Showers
Rain Showers Likely
Driving Route Map
The map below follows the saved road route between Erie and Williamstown.
Turn-by-Turn Driving Directions
Step-by-step road directions between Erie and Williamstown.
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1
Start on State Street
2318 ft · 2 min · State Street
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2
Turn right onto West 12th Street
2 mi · 4 min · West 12th Street
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3
Turn right onto Greengarden Boulevard
583 ft · 23 sec · Greengarden Boulevard
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4
Turn left onto West Bayfront Parkway
862 ft · 20 sec · West Bayfront Parkway
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5
Continue on Raymond P Shafer Highway
111.8 mi · 2 hr 1 min · Raymond P Shafer Highway
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6
Keep slight left to continue on Parkway North
11.4 mi · 16 min · Parkway North
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7
Keep slight right to continue on I 579 South: Veterans Bridge
1.6 mi · 3 min
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8
Keep slight left to continue on Liberty Bridge
1154 ft · 27 sec
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9
Continue on Liberty Bridge
2795 ft · 1 min · Liberty Bridge
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10
Continue on Liberty Tunnels
1.2 mi · 2 min · Liberty Tunnels
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11
Continue on West Liberty Avenue
46 m · 4 sec · West Liberty Avenue
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12
Take the exit slight right toward PA 51: Uniontown
719 ft · 42 sec
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13
Merge slight left onto Saw Mill Run Boulevard
2.6 mi · 6 min · Saw Mill Run Boulevard
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14
Turn slight right onto Fairhaven Road
532 ft · 15 sec · Fairhaven Road
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15
Continue on Provost Road
1.3 mi · 3 min · Provost Road
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16
Continue on Brownsville Road
2 mi · 4 min · Brownsville Road
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17
Continue on Brownsville Road
2903 ft · 1 min · Brownsville Road
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18
Continue on Brownsville Road
3.9 mi · 8 min · Brownsville Road
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19
Turn slight left onto McChain Road
1.8 mi · 4 min · McChain Road
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20
At the end of the road, turn left onto Finleyville Elrama Road
2159 ft · 46 sec · Finleyville Elrama Road
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21
Take the ramp right
2776 ft · 1 min
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22
Merge slight left onto Mon/Fayette Expressway
19.1 mi · 21 min · Mon/Fayette Expressway
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23
Take the exit slight right toward PA 88 South: West Brownsville, Fredericktown
2436 ft · 59 sec
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24
Keep slight right
6.1 mi · 9 min
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25
Turn right onto Main Street
2 mi · 4 min · Main Street
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26
Turn right onto 2nd Avenue
853 ft · 39 sec · 2nd Avenue
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27
Turn right onto Taylor Avenue
14 m · 2 sec · Taylor Avenue
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28
Arrive at your destination
0 m · 1 sec · Taylor Avenue
Car Route Details
A richer read on the saved driving route between Erie and Williamstown.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
Raymond P Shafer Highway
Continue on Raymond P Shafer Highway
112 mi · 02h 02m
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 Showers leaving Erie and Rain Showers Likely near Williamstown.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Erie to Williamstown?
The road trip is about 170.5 miles (274.4 km) and usually takes 03h 34m 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?
Portersville is a useful midpoint, sitting about 85.3 miles from Erie and 85.2 miles from Williamstown.
How much longer is the road route than the straight-line distance?
The direct path is about 148.6 miles (239.1 km), while the road route adds roughly 21.9 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 EDT. If you want a more comfortable same-day return, try to leave by 9:50 AM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $24.60 one way or $49.20 round trip. Estimated CO2 is about 53.5 kg one way.
What should you check before leaving?
Before you leave, expect Chance Rain Showers around Erie and Rain Showers Likely near Williamstown.
Stop Ideas Near Portersville
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 Portersville.
Union Station
Alliance
Greensburg
Latrobe station
Flight Path Map
This map shows the direct air route between Erie and Williamstown. Straight-line distance: 148.57 mi (239.1 km).
#1 Erie
The second most populous city in Pennsylvania.
| Population | 95,077 |
| Coordinates | 42.1292200, -80.0850600 |
| Altitude | 199 |
| Country | United States |
#2 Williamstown
Borough in northeastern Dauphin County, Pennsylvania, United States
| Population | 1,386 |
| Coordinates | 39.9792400, -80.0408900 |
| Altitude | 256 |
| Country | United States |
End: Williamstown (-80.04089, 39.97924)
Estimated Travel Time
Distance: 274 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 05h 40m |
| 40 mph (64.37 km/h) | 04h 15m |
| 50 mph (80.47 km/h) | 03h 24m |
| 60 mph (96.56 km/h) | 02h 50m |
| 70 mph (112.65 km/h) | 02h 26m |
| 80 mph (129 km/h) | 02h 07m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.09 | $24.60 | $49.20 |
| Mid-grade | $4.60 | $27.69 | $55.37 |
| Premium | $4.95 | $29.82 | $59.65 |
| Diesel | $5.98 | $36.00 | $72.00 |
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 Pennsylvania · Apr 19, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.