How far is Erie, PA from Williamstown, PA?
The driving distance from Erie, PA to Williamstown, PA is about 310.9 miles (500.3 km), with a travel time of about 06h 00m by car.
- The straight-line flight distance is about 209.2 miles (336.7 km).
- For a round trip, plan for roughly 12h 00m 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 06h 00m.
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.
Census designated place
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Partly Cloudy
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.
-
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
66.8 mi · 1 hr 12 min · Raymond P Shafer Highway
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6
Take the exit slight right toward I 80 East: Clarion
2084 ft · 59 sec
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7
Merge slight left onto Keystone Shortway
192.1 mi · 3 hr 26 min · Keystone Shortway
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8
Take the exit slight right
783 ft · 10 sec
-
9
Keep slight right to continue on PA 147 South: Milton
2968 ft · 1 min
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10
Merge slight left
11.6 mi · 14 min
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11
Continue on County Line Road
694 ft · 11 sec · County Line Road
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12
Turn right
3.3 mi · 5 min
-
13
Take the exit slight right toward PA 61 South: Sunbury
2876 ft · 2 min
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14
Continue straight
2959 ft · 56 sec
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15
Take the exit slight right
13.9 mi · 21 min
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16
Turn slight right onto Grove Road
111 m · 7 sec · Grove Road
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17
Turn straight
4.1 mi · 7 min
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18
Turn right onto South Chestnut Street
1.4 km · 2 min · South Chestnut Street
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19
Turn left onto Luxemburg Road
1414 ft · 28 sec · Luxemburg Road
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20
Turn right onto North Crossroads Road
4.6 mi · 8 min · North Crossroads Road
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21
Turn left
7.7 mi · 11 min
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22
Continue on South Water Street
1200 ft · 54 sec · South Water Street
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23
Turn right onto Station Street
111 m · 19 sec · Station Street
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24
Turn left onto South West Street
108 m · 18 sec · South West Street
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25
Turn right onto West Market Street
112 m · 16 sec · West Market Street
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26
Arrive at your destination
0 m · 1 sec · East Market Street
Car Route Details
A richer read on the saved driving route between Erie and Williamstown.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
Keystone Shortway
Merge slight left onto Keystone Shortway
192 mi · 03h 26m
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.
Mostly Sunny leaving Erie and Partly Cloudy 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 310.9 miles (500.3 km) and usually takes 06h 00m 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?
Treasure Lake is a useful midpoint, sitting about 154.9 miles from Erie and 156 miles from Williamstown.
How much longer is the road route than the straight-line distance?
The direct path is about 209.2 miles (336.7 km), while the road route adds roughly 101.7 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 5:00 AM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $48.97 one way or $97.94 round trip. Estimated CO2 is about 97.5 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Erie and Partly Cloudy near Williamstown.
Stop Ideas Near Treasure Lake
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 Treasure Lake.
Tyrone
Altoona Transportation Center
Johnstown
Huntingdon
Flight Path Map
This map shows the direct air route between Erie and Williamstown. Straight-line distance: 209.25 mi (336.75 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
Situated in the eastern part of Dauphin County, Pennsylvania, at an elevation of approximately 732 feet above sea level, this borough sits within the Ridge and Valley Appalachian province.
| Population | 0 |
| Coordinates | 40.5800900, -76.6177400 |
| Altitude | 223 |
| Country | United States |
End: Williamstown (-76.61774, 40.58009)
Estimated Travel Time
Distance: 500 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 10h 21m |
| 40 mph (64.37 km/h) | 07h 46m |
| 50 mph (80.47 km/h) | 06h 13m |
| 60 mph (96.56 km/h) | 05h 10m |
| 70 mph (112.65 km/h) | 04h 26m |
| 80 mph (129 km/h) | 03h 52m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.46 | $48.97 | $97.94 |
| Mid-grade | $4.93 | $54.03 | $108.05 |
| Premium | $5.31 | $58.20 | $116.39 |
| Diesel | $6.55 | $71.85 | $143.71 |
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 · Oct 15, 2026