How far is Williamstown, PA from Allentown, PA?
The driving distance from Williamstown, PA to Allentown, PA is about 70 miles (112.6 km), with a travel time of about 01h 25m by car.
- The straight-line flight distance is about 59.2 miles (95.3 km).
- For a round trip, plan for roughly 02h 50m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 8:00 AM to 10:00 AM EDT.
Reverse, save, or send this route
This route works well as a day trip with time at the destination. Copy the route link, send it to another device, or print a clean version before you head out.
This route works well as a day trip with time at the destination.
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 01h 25m.
A morning start gives you useful time at the destination and keeps the return out of the late evening.
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.
Partly Cloudy
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Williamstown and Allentown.
Turn-by-Turn Driving Directions
Step-by-step road directions between Williamstown and Allentown.
-
1
Start on East Market Street
885 ft · 41 sec · East Market Street
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2
Turn right onto South Railroad Street
1452 ft · 1 min · South Railroad Street
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3
Turn left
9.8 mi · 15 min
-
4
Take the ramp slight right
1767 ft · 43 sec
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5
Merge slight left
2.2 mi · 3 min
-
6
Take the exit slight right toward PA 125: Ravine
1138 ft · 30 sec
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7
Turn right onto Molleystown Road
2889 ft · 51 sec · Molleystown Road
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8
At the end of the road, turn right onto South Tremont Road
2.3 mi · 4 min · South Tremont Road
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9
Continue on North Tulpehocken Street
1.3 mi · 3 min · North Tulpehocken Street
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10
Turn left onto East Wood Street
1094 ft · 18 sec · East Wood Street
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11
Continue on Rock Road
2108 ft · 1 min · Rock Road
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12
Turn right onto Bethel Road
2.9 mi · 4 min · Bethel Road
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13
Continue on Lancaster Avenue
4.8 mi · 7 min · Lancaster Avenue
-
14
Take the exit left toward I 78 East, US 22 East: Allentown
1126 ft · 28 sec
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15
Merge slight left onto William Penn Highway
38 mi · 45 min · William Penn Highway
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16
Keep slight right to continue on Lehigh Valley Thruway
1.5 km · 1 min · Lehigh Valley Thruway
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17
Take the exit slight right toward Cetronia
1053 ft · 27 sec
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18
Turn straight onto Tilghman Street
4.9 mi · 8 min · Tilghman Street
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19
Arrive at your destination
0 m · 1 sec · Tilghman Street
Car Route Details
A richer read on the saved driving route between Williamstown and Allentown.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
William Penn Highway
Merge slight left onto William Penn Highway
38 mi · 00h 45m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A comfortable day-trip route
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
Partly Cloudy leaving Williamstown and Mostly Sunny near Allentown.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Williamstown to Allentown?
The road trip is about 70 miles (112.6 km) and usually takes 01h 25m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
What is the halfway point on this route?
Bernville is a useful midpoint, sitting about 34.8 miles from Williamstown and 35.2 miles from Allentown.
How much longer is the road route than the straight-line distance?
The direct path is about 59.2 miles (95.3 km), while the road route adds roughly 10.8 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 8:00 AM to 10:00 AM EDT. If you want a more comfortable same-day return, try to leave by 3:40 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $11.03 one way or $22.05 round trip. Estimated CO2 is about 22 kg one way.
What should you check before leaving?
Before you leave, expect Partly Cloudy around Williamstown and Mostly Sunny near Allentown.
Stop Ideas Near Bernville
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 Bernville.
Lancaster station
Mount Joy
Elizabethtown station
Parkesburg
Flight Path Map
This map shows the direct air route between Williamstown and Allentown. Straight-line distance: 59.19 mi (95.26 km).
#1 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 |
#2 Allentown
The third most populous city in Pennsylvania.
| Population | 121,470 |
| Coordinates | 40.6084300, -75.4901800 |
| Altitude | 103 |
| Country | United States |
End: Tilghman Street (-75.490007, 40.608068)
Estimated Travel Time
Distance: 113 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 02h 19m |
| 40 mph (64.37 km/h) | 01h 44m |
| 50 mph (80.47 km/h) | 01h 23m |
| 60 mph (96.56 km/h) | 01h 09m |
| 70 mph (112.65 km/h) | 00h 59m |
| 80 mph (129 km/h) | 00h 52m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.46 | $11.03 | $22.05 |
| Mid-grade | $4.93 | $12.16 | $24.33 |
| Premium | $5.31 | $13.10 | $26.21 |
| Diesel | $6.55 | $16.18 | $32.36 |
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