How far is Allentown, PA from Williamstown, PA?
The driving distance from Allentown, PA to Williamstown, PA is about 69.8 miles (112.3 km), with a travel time of about 01h 37m by car.
- The straight-line flight distance is about 59.2 miles (95.3 km).
- For a round trip, plan for roughly 03h 15m 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 37m.
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.
Mostly Sunny
Partly Cloudy
Driving Route Map
The map below follows the saved road route between Allentown and Williamstown.
Turn-by-Turn Driving Directions
Step-by-step road directions between Allentown and Williamstown.
-
1
Start on Tilghman Street
5 mi · 8 min · Tilghman Street
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2
Take the ramp slight left toward US 22 West: Harrisburg
698 ft · 18 sec
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3
Merge slight left onto Lehigh Valley Thruway
1.1 km · 54 sec · Lehigh Valley Thruway
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4
Merge slight left onto William Penn Highway
38.5 mi · 46 min · William Penn Highway
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5
Take the exit slight right toward PA 501: Bethel
806 ft · 22 sec
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6
Turn right onto Lancaster Avenue
4.7 mi · 7 min · Lancaster Avenue
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7
Continue on Bethel Road
2.9 mi · 4 min · Bethel Road
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8
At the end of the road, turn left onto Rock Road
2108 ft · 1 min · Rock Road
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9
Continue on East Wood Street
1094 ft · 20 sec · East Wood Street
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10
At the end of the road, turn right onto South Tulpehocken Street
1.3 mi · 3 min · South Tulpehocken Street
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11
Continue on Tremont Road
2.3 mi · 4 min · Tremont Road
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12
Turn left onto Molleystown Road
756 ft · 18 sec · Molleystown Road
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13
Take the ramp left
1476 ft · 36 sec
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14
Merge slight left
2.5 mi · 3 min
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15
Take the exit slight right toward US 209: Tremont, Tower City
1661 ft · 40 sec
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16
Turn right
10 mi · 16 min
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17
Turn right onto South Railroad Street
1452 ft · 1 min · South Railroad Street
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18
Turn left onto East Market Street
885 ft · 39 sec · East Market Street
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19
Arrive at your destination
0 m · 1 sec · East Market Street
Car Route Details
A richer read on the saved driving route between Allentown 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.
William Penn Highway
Merge slight left onto William Penn Highway
38.5 mi · 00h 46m
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.
Mostly Sunny leaving Allentown 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 Allentown to Williamstown?
The road trip is about 69.8 miles (112.3 km) and usually takes 01h 37m 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 Allentown and 35 miles from Williamstown.
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 10.6 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 3:14 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $10.98 one way or $21.96 round trip. Estimated CO2 is about 21.9 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Allentown and Partly Cloudy near Williamstown.
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 Allentown and Williamstown. Straight-line distance: 59.19 mi (95.26 km).
#1 Allentown
The third most populous city in Pennsylvania.
| Population | 121,470 |
| Coordinates | 40.6084300, -75.4901800 |
| Altitude | 103 |
| 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: 112 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 | $10.98 | $21.96 |
| Mid-grade | $4.93 | $12.12 | $24.23 |
| Premium | $5.31 | $13.05 | $26.10 |
| Diesel | $6.55 | $16.11 | $32.23 |
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