How far is Erie, PA from South Williamsport, PA?
The driving distance from Erie, PA to South Williamsport, PA is about 259.4 miles (417.5 km), with a travel time of about 04h 49m by car.
- The straight-line flight distance is about 170.9 miles (275 km).
- For a round trip, plan for roughly 09h 39m 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 04h 49m.
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.
Showers And Thunderstorms Likely
Partly Sunny
Driving Route Map
The map below follows the saved road route between Erie and South Williamsport.
Turn-by-Turn Driving Directions
Step-by-step road directions between Erie and South Williamsport.
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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
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
153.3 mi · 2 hr 44 min · Keystone Shortway
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8
Take the exit slight right toward PA 64: Pleasant Gap, Mill Hall
2074 ft · 54 sec
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9
Turn left onto Nittany Valley Drive
4.5 mi · 8 min · Nittany Valley Drive
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10
Turn right onto Long Run Road
105 m · 7 sec · Long Run Road
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11
Take the ramp slight right
1182 ft · 40 sec
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12
Turn sharp left onto Frank D O'Reilly Jr Highway
5.7 mi · 7 min · Frank D O'Reilly Jr Highway
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13
Continue on Appalachian Thwy
1369 ft · 18 sec · Appalachian Thwy
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14
Continue on Appalachian Thruway
10.4 mi · 12 min · Appalachian Thruway
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15
Continue on Susquehanna Beltway
13.8 mi · 16 min · Susquehanna Beltway
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16
Take the exit slight right toward US 15 South: Lewisburg
949 ft · 23 sec
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17
Keep slight right
48 m · 6 sec
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18
Merge slight left onto Market Street
2110 ft · 55 sec · Market Street
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19
Turn right onto West Southern Avenue
1332 ft · 32 sec · West Southern Avenue
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20
Arrive at your destination
0 m · 1 sec · West Southern Avenue
Car Route Details
A richer read on the saved driving route between Erie and South Williamsport.
Interchange-aware route
The drive includes several ramps, exits, or merges, so checking the next few maneuvers before busy interchanges is useful.
Keystone Shortway
Merge slight left onto Keystone Shortway
153 mi · 02h 44m
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 Erie and Partly Sunny near South Williamsport.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Erie to South Williamsport?
The road trip is about 259.4 miles (417.5 km) and usually takes 04h 49m 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?
Brookville is a useful midpoint, sitting about 129.6 miles from Erie and 129.9 miles from South Williamsport.
How much longer is the road route than the straight-line distance?
The direct path is about 170.9 miles (275 km), while the road route adds roughly 88.5 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 EDT. If you want a more comfortable same-day return, try to leave by 7:20 AM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $37.43 one way or $74.86 round trip. Estimated CO2 is about 81.4 kg one way.
What should you check before leaving?
Before you leave, expect Showers And Thunderstorms Likely around Erie and Partly Sunny near South Williamsport.
Stop Ideas Near Brookville
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 Brookville.
Tyrone
Altoona Transportation Center
Johnstown
Latrobe station
Flight Path Map
This map shows the direct air route between Erie and South Williamsport. Straight-line distance: 170.87 mi (274.99 km).
#1 Erie
The second most populous city in Pennsylvania.
| Population | 95,077 |
| Coordinates | 42.1292200, -80.0850600 |
| Altitude | 199 |
| Country | United States |
#2 South Williamsport
Borough in Lycoming County, Pennsylvania
| Population | 6,064 |
| Coordinates | 41.2320200, -76.9991300 |
| Altitude | 159 |
| Country | United States |
End: South Williamsport (-76.99913, 41.23202)
Estimated Travel Time
Distance: 418 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 08h 38m |
| 40 mph (64.37 km/h) | 06h 29m |
| 50 mph (80.47 km/h) | 05h 11m |
| 60 mph (96.56 km/h) | 04h 19m |
| 70 mph (112.65 km/h) | 03h 42m |
| 80 mph (129 km/h) | 03h 14m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.09 | $37.43 | $74.86 |
| Mid-grade | $4.60 | $42.13 | $84.25 |
| Premium | $4.95 | $45.38 | $90.76 |
| Diesel | $5.98 | $54.78 | $109.55 |
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 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.