How far is Bethlehem, PA from King of Prussia, PA?
The driving distance from Bethlehem, PA to King of Prussia, PA is about 50.3 miles (81 km), with a travel time of about 01h 12m by car.
- The straight-line flight distance is about 37.1 miles (59.7 km).
- For a round trip, plan for roughly 02h 24m 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 12m.
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.
Showers And Thunderstorms
Mostly Cloudy then Showers And Thunderstorms Likely
Driving Route Map
The map below follows the saved road route between Bethlehem and King of Prussia.
Turn-by-Turn Driving Directions
Step-by-step road directions between Bethlehem and King of Prussia.
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1
Start on Linden Street
2668 ft · 1 min · Linden Street
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2
Turn right onto East Church Street
1336 ft · 45 sec · East Church Street
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3
Turn left onto Center Street
1318 ft · 34 sec · Center Street
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4
Turn left onto Fahy Bridge
1940 ft · 48 sec · Fahy Bridge
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5
Continue on South New Street
544 ft · 19 sec · South New Street
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6
Turn right onto West 4th Street
1174 ft · 38 sec · West 4th Street
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7
Turn slight left onto Broadway
971 ft · 22 sec · Broadway
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8
Turn left onto Wyandotte Street
1 km · 2 min · Wyandotte Street
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9
Continue on PA-378
2776 ft · 1 min · PA-378
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10
Continue on PA-378
4.6 mi · 7 min · PA-378
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11
Turn left
5.1 mi · 8 min
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12
Turn right onto West Pumping Station Road
2337 ft · 1 min · West Pumping Station Road
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13
Turn left onto Portzer Road
2011 ft · 56 sec · Portzer Road
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14
Exit the roundabout onto Portzer Road
2385 ft · 1 min · Portzer Road
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15
Turn right onto John Fries Highway
2.6 mi · 4 min · John Fries Highway
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16
Take the ramp slight right toward PATP
1962 ft · 2 min
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17
Keep slight left to continue on I 476 South: Philadelphia
2321 ft · 1 min
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18
Merge slight left onto Pennsylvania Turnpike Northeast Extension
23.8 mi · 26 min · Pennsylvania Turnpike Northeast Extension
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19
Continue on Pennsylvania Turnpike Northeast Extension
1558 ft · 24 sec · Pennsylvania Turnpike Northeast Extension
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20
Keep slight left to continue on Pennsylvania Turnpike Northeast Extension
1179 ft · 18 sec · Pennsylvania Turnpike Northeast Extension
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21
Continue on Mid-County Expressway
3.4 mi · 5 min · Mid-County Expressway
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22
Take the exit slight right toward I 76 East, I 76 West: Philadelphia, Valley Forge
1758 ft · 43 sec
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23
Keep slight right to continue on I 76 West: Valley Forge
159 m · 13 sec
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24
Keep slight left to continue on I 76 West: Valley Forge
1526 ft · 37 sec
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25
Merge slight left onto Schuylkill Expressway
3.5 mi · 5 min · Schuylkill Expressway
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26
Take the exit slight right toward US 202, US 422 West: King of Prussia, West Chester, Pottstown
632 ft · 10 sec
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27
Keep slight left to continue on US 202 South, US 422 West: Mall Boulevard, West Chester, Pottstown, Swedesford Road
1447 ft · 22 sec
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28
Keep slight left to continue on Mall Boulevard
1331 ft · 21 sec
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29
Keep slight right to continue on Mall Boulevard
1891 ft · 1 min
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30
At the end of the road, turn left
29 m · 7 sec
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31
Arrive at your destination
0 m · 1 sec
Car Route Details
A richer read on the saved driving route between Bethlehem and King of Prussia.
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
23.8 mi · 00h 26m
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.
Showers And Thunderstorms leaving Bethlehem and Mostly Cloudy then Showers And Thunderstorms Likely near King of Prussia.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Bethlehem to King of Prussia?
The road trip is about 50.3 miles (81 km) and usually takes 01h 12m 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 25.2 miles from Bethlehem and 25.2 miles from King of Prussia.
How much longer is the road route than the straight-line distance?
The direct path is about 37.1 miles (59.7 km), while the road route adds roughly 13.2 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 4:06 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $7.27 one way or $14.55 round trip. Estimated CO2 is about 15.8 kg one way.
What should you check before leaving?
Before you leave, expect Showers And Thunderstorms around Bethlehem and Mostly Cloudy then Showers And Thunderstorms Likely near King of Prussia.
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 Bethlehem and King of Prussia. Straight-line distance: 37.1 mi (59.71 km).
#1 Bethlehem
The second most populous city in Northampton County, Pennsylvania.
| Population | 74,892 |
| Coordinates | 40.6259300, -75.3704600 |
| Altitude | 109 |
| Country | United States |
#2 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 |
End: King of Prussia (-75.39602, 40.08927)
Estimated Travel Time
Distance: 81 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 40m |
| 40 mph (64.37 km/h) | 01h 15m |
| 50 mph (80.47 km/h) | 01h 00m |
| 60 mph (96.56 km/h) | 00h 50m |
| 70 mph (112.65 km/h) | 00h 43m |
| 80 mph (129 km/h) | 00h 37m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.09 | $7.27 | $14.55 |
| Mid-grade | $4.60 | $8.19 | $16.37 |
| Premium | $4.95 | $8.82 | $17.64 |
| Diesel | $5.98 | $10.64 | $21.29 |
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.