How far is Upper Darby, PA from Slippery Rock, PA?
The driving distance from Upper Darby, PA to Slippery Rock, PA is about 349.9 miles (563.1 km), with a travel time of about 06h 37m by car.
- The straight-line flight distance is about 263.2 miles (423.6 km).
- For a round trip, plan for roughly 13h 14m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 7:30 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 06h 37m.
Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
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 Clear
Sunny
Driving Route Map
The map below follows the saved road route between Upper Darby and Slippery Rock.
Turn-by-Turn Driving Directions
Step-by-step road directions between Upper Darby and Slippery Rock.
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1
Start on West Providence Road
1430 ft · 46 sec · West Providence Road
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2
Turn left onto South Lansdowne Avenue
3 mi · 8 min · South Lansdowne Avenue
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3
Continue on Darby Road
144 m · 14 sec · Darby Road
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4
Turn slight left onto West Chester Pike
2.2 mi · 5 min · West Chester Pike
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5
Take the exit slight right toward I 476 North: Plymouth Meeting
2005 ft · 59 sec
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6
Merge slight left onto Mid-County Expressway
7 mi · 10 min · Mid-County Expressway
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7
Take the exit slight right toward I 76 West: Valley Forge
2184 ft · 53 sec
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8
Merge slight left onto Schuylkill Expressway
3.7 mi · 5 min · Schuylkill Expressway
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9
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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10
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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11
Keep slight left to continue on Mall Boulevard
1331 ft · 21 sec
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12
Keep slight left to continue on I 76 West: New Jersey, Harrisburg
533 ft · 8 sec
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13
Merge slight left onto Schuylkill Expressway
2317 ft · 53 sec · Schuylkill Expressway
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14
Keep slight left to continue on I 76 West: Harrisburg
1919 ft · 1 min
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15
Merge slight left onto Pennsylvania Turnpike
298.5 mi · 5 hr 25 min · Pennsylvania Turnpike
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16
Take the exit slight right toward I 79, US 19: Erie, Pittsburgh, Warrendale, Cranberry
1064 ft · 26 sec
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17
Keep slight left
2049 ft · 54 sec
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18
Keep slight left to continue on I 79 North: Erie
2892 ft · 1 min
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19
Merge slight left
27.2 mi · 29 min
-
20
Take the exit slight right toward PA 108: Slippery Rock
876 ft · 55 sec
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21
Turn left onto New Castle Road
3.4 mi · 5 min · New Castle Road
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22
Continue on New Castle Street
1.1 km · 2 min · New Castle Street
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23
Turn right onto South Main Street
13 m · 1 sec · South Main Street
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24
Arrive at your destination
0 m · 1 sec · South Main Street
Car Route Details
A richer read on the saved driving route between Upper Darby and Slippery Rock.
Long-distance drive
This route is long enough that fuel, rest stops, weather, and timing matter more than any single maneuver.
Pennsylvania Turnpike
Merge slight left onto Pennsylvania Turnpike
299 mi · 05h 25m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
Better with a longer stop
This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.
Mostly Clear leaving Upper Darby and Sunny near Slippery Rock.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Upper Darby to Slippery Rock?
The road trip is about 349.9 miles (563.1 km) and usually takes 06h 37m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route is long enough that most travelers will be better off planning an overnight stay or a more deliberate stop window.
What is the halfway point on this route?
Valley-Hi is a useful midpoint, sitting about 174.7 miles from Upper Darby and 175.2 miles from Slippery Rock.
How much longer is the road route than the straight-line distance?
The direct path is about 263.2 miles (423.6 km), while the road route adds roughly 86.7 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 7:30 AM EDT. Starting early still helps, but most travelers will want a longer stop or an overnight stay on a route this long.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $50.42 one way or $100.84 round trip. Estimated CO2 is about 109.7 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Clear around Upper Darby and Sunny near Slippery Rock.
Stop Ideas Near Valley-Hi
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 Valley-Hi.
Hancock, MD
Huntingdon
Altoona Transportation Center
Hagerstown, MD
Flight Path Map
This map shows the direct air route between Upper Darby and Slippery Rock. Straight-line distance: 263.21 mi (423.6 km).
#1 Upper Darby
Town in Delaware County, Pennsylvania, United States
| Population | 82,883 |
| Coordinates | 39.9284500, -75.2738000 |
| Altitude | 20 |
| Country | United States |
#2 Slippery Rock
Borough in Butler County, Pennsylvania, United States
| Population | 3,508 |
| Coordinates | 41.0639500, -80.0564500 |
| Altitude | 397 |
| Country | United States |
End: Slippery Rock (-80.05645, 41.06395)
Estimated Travel Time
Distance: 563 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 11h 39m |
| 40 mph (64.37 km/h) | 08h 44m |
| 50 mph (80.47 km/h) | 06h 59m |
| 60 mph (96.56 km/h) | 05h 49m |
| 70 mph (112.65 km/h) | 04h 59m |
| 80 mph (129 km/h) | 04h 21m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.09 | $50.42 | $100.84 |
| Mid-grade | $4.60 | $56.75 | $113.50 |
| Premium | $4.95 | $61.13 | $122.26 |
| Diesel | $5.98 | $73.79 | $147.59 |
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 23, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.