How far is King of Prussia, PA from Allentown, PA?
The driving distance from King of Prussia, PA to Allentown, PA is about 51.6 miles (83.1 km), with a travel time of about 00h 54m by car.
- The straight-line flight distance is about 36.2 miles (58.3 km).
- For a round trip, plan for roughly 01h 49m 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 00h 54m.
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.
Township in Montgomery County, Pennsylvania
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Cloudy then Showers And Thunderstorms Likely
Rain Showers Likely
Driving Route Map
The map below follows the saved road route between King of Prussia and Allentown.
Turn-by-Turn Driving Directions
Step-by-step road directions between King of Prussia and Allentown.
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1
Start on the route
19 m · 6 sec
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2
Turn right
54 m · 15 sec
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3
Continue on PATP
1707 ft · 43 sec
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4
Merge slight left onto Schuylkill Expressway
2039 ft · 48 sec · Schuylkill Expressway
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5
Keep slight right to continue on I 276 East: Allentown, New York City
1255 ft · 43 sec
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6
Merge slight left onto Pennsylvania Turnpike
7.3 mi · 8 min · Pennsylvania Turnpike
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7
Take the exit slight right toward I 476 North: Northeast Extension, Allentown
2275 ft · 1 min
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8
Merge slight left onto Pennsylvania Turnpike Northeast Extension
36.9 mi · 40 min · Pennsylvania Turnpike Northeast Extension
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9
Take the exit slight right toward I 78, US 22, PA 309: Allentown, Harrisburg
1.1 km · 2 min
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10
Turn slight right onto US 22 East: Allentown
975 ft · 29 sec
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11
Merge slight left onto Lehigh Valley Thruway
1762 ft · 27 sec · Lehigh Valley Thruway
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12
Take the exit slight right toward PA 309 South: Quakertown
2245 ft · 55 sec
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13
Merge slight left
2844 ft · 44 sec
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14
Take the exit slight right toward Tilghman Street East
886 ft · 22 sec
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15
Turn straight onto Tilghman Street
3.6 mi · 6 min · Tilghman Street
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16
Arrive at your destination
0 m · 1 sec · Tilghman Street
Car Route Details
A richer read on the saved driving route between King of Prussia 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.
Pennsylvania Turnpike Northeast Extension
Merge slight left onto Pennsylvania Turnpike Northeast Extension
36.9 mi · 00h 40m
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 Cloudy then Showers And Thunderstorms Likely leaving King of Prussia and Rain Showers Likely near Allentown.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from King of Prussia to Allentown?
The road trip is about 51.6 miles (83.1 km) and usually takes 00h 54m 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?
Franconia is a useful midpoint, sitting about 25.8 miles from King of Prussia and 25.8 miles from Allentown.
How much longer is the road route than the straight-line distance?
The direct path is about 36.2 miles (58.3 km), while the road route adds roughly 15.4 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 4:40 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $7.44 one way or $14.87 round trip. Estimated CO2 is about 16.2 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Cloudy then Showers And Thunderstorms Likely around King of Prussia and Rain Showers Likely near Allentown.
Stop Ideas Near Franconia
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 Franconia.
Paoli
Ardmore
Exton
North Philadelphia station
Flight Path Map
This map shows the direct air route between King of Prussia and Allentown. Straight-line distance: 36.21 mi (58.28 km).
#1 King of Prussia
Census-designated place in Montgomery County, Pennsylvania, United States
| Population | 19,936 |
| Coordinates | 40.0892700, -75.3960200 |
| Altitude | 61 |
| 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: 83 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 43m |
| 40 mph (64.37 km/h) | 01h 17m |
| 50 mph (80.47 km/h) | 01h 01m |
| 60 mph (96.56 km/h) | 00h 51m |
| 70 mph (112.65 km/h) | 00h 44m |
| 80 mph (129 km/h) | 00h 38m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.09 | $7.44 | $14.87 |
| Mid-grade | $4.60 | $8.37 | $16.74 |
| Premium | $4.95 | $9.02 | $18.03 |
| Diesel | $5.98 | $10.88 | $21.77 |
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 · May 13, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.