How far is Upper Darby, PA from Saint Marys, PA?
The driving distance from Upper Darby, PA to Saint Marys, PA is about 285.8 miles (459.9 km), with a travel time of about 05h 38m by car.
- The straight-line flight distance is about 201 miles (323.4 km).
- For a round trip, plan for roughly 11h 16m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 6:00 AM to 8:00 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 05h 38m.
An early departure helps you fit a real stop into the day without turning the return into a late-night drive.
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 in southern Montour County, Pennsylvania
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny
Showers And Thunderstorms
Driving Route Map
The map below follows the saved road route between Upper Darby and Saint Marys.
Turn-by-Turn Driving Directions
Step-by-step road directions between Upper Darby and Saint Marys.
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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
10.6 mi · 14 min · Mid-County Expressway
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7
Turn slight left onto Mid-County Expressway
885 ft · 14 sec · Mid-County Expressway
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8
Continue on Pennsylvania Turnpike Northeast Extension
75 mi · 1 hr 21 min · Pennsylvania Turnpike Northeast Extension
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9
Take the exit slight right toward PA 940, I 80: Hazleton, Mount Pocono
1.1 km · 2 min
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10
Keep slight left
879 ft · 24 sec
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11
Keep slight right to continue on I 80 West: Hazleton
1650 ft · 40 sec
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12
Merge slight left onto Keystone Shortway
165.5 mi · 3 hr · Keystone Shortway
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13
Take the exit slight right toward PA 153: Clearfield, Penfield
2880 ft · 1 min
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14
Keep slight right
1315 ft · 32 sec
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15
Turn straight onto State Park Road
7.5 mi · 13 min · State Park Road
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16
Turn right onto Bennetts Valley Highway
7.9 mi · 13 min · Bennetts Valley Highway
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17
Continue on Million Dollar Highway
1235 ft · 21 sec · Million Dollar Highway
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18
Continue on Bennetts Valley Highway
2.6 mi · 4 min · Bennetts Valley Highway
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19
Turn straight onto Million Dollar Highway
8.1 mi · 12 min · Million Dollar Highway
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20
Continue on South Saint Marys Street
747 ft · 15 sec · South Saint Marys Street
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21
Turn right onto Railroad Street
31 m · 2 sec · Railroad Street
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22
Arrive at your destination
0 m · 1 sec · Railroad Street
Car Route Details
A richer read on the saved driving route between Upper Darby and Saint Marys.
Interchange-aware route
The drive includes several ramps, exits, or merges, so checking the next few maneuvers before busy interchanges is useful.
Keystone Shortway
Merge slight left onto Keystone Shortway
166 mi · 03h 00m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A longer out-and-back drive
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
Mostly Sunny leaving Upper Darby and Showers And Thunderstorms near Saint Marys.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Upper Darby to Saint Marys?
The road trip is about 285.8 miles (459.9 km) and usually takes 05h 38m in normal driving conditions.
Is this a same-day trip or an overnight route?
This is still possible in one day, but it becomes a long driving day. Leaving early and planning your stop window matters more here.
What is the halfway point on this route?
Danville is a useful midpoint, sitting about 142.7 miles from Upper Darby and 143 miles from Saint Marys.
How much longer is the road route than the straight-line distance?
The direct path is about 201 miles (323.4 km), while the road route adds roughly 84.8 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 6:00 AM to 8:00 AM EDT. If you want a more comfortable same-day return, try to leave by 5:44 AM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $41.19 one way or $82.37 round trip. Estimated CO2 is about 89.6 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny around Upper Darby and Showers And Thunderstorms near Saint Marys.
Stop Ideas Near Danville
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 Danville.
Wilkes-Barre, PA
White Haven, PA
Harrisburg Transportation Center
Middletown
Flight Path Map
This map shows the direct air route between Upper Darby and Saint Marys. Straight-line distance: 200.97 mi (323.43 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 Saint Marys
City in Camden County, Georgia, USA
| Population | 12,157 |
| Coordinates | 41.4278400, -78.5608600 |
| Altitude | 506 |
| Country | United States |
End: Saint Marys (-78.56086, 41.42784)
Estimated Travel Time
Distance: 460 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 09h 31m |
| 40 mph (64.37 km/h) | 07h 08m |
| 50 mph (80.47 km/h) | 05h 42m |
| 60 mph (96.56 km/h) | 04h 45m |
| 70 mph (112.65 km/h) | 04h 04m |
| 80 mph (129 km/h) | 03h 33m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.09 | $41.19 | $82.37 |
| Mid-grade | $4.60 | $46.36 | $92.72 |
| Premium | $4.95 | $49.94 | $99.87 |
| Diesel | $5.98 | $60.28 | $120.56 |
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 19, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.