How far is Saint Marys, PA from Upper Darby, PA?
The driving distance from Saint Marys, PA to Upper Darby, PA is about 266.7 miles (429.2 km), with a travel time of about 04h 49m by car.
- The straight-line flight distance is about 201 miles (323.4 km).
- For a round trip, plan for roughly 09h 38m 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 04h 49m.
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.
Showers And Thunderstorms
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Saint Marys and Upper Darby.
Turn-by-Turn Driving Directions
Step-by-step road directions between Saint Marys and Upper Darby.
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1
Start on Railroad Street
14 m · 2 sec · Railroad Street
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2
Turn left onto South Michael Street
68 m · 4 sec · South Michael Street
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3
Turn slight left
1068 ft · 22 sec
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4
Continue on Million Dollar Highway
10.9 mi · 16 min · Million Dollar Highway
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5
Continue on Bennetts Valley Highway
7.9 mi · 13 min · Bennetts Valley Highway
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6
Turn left onto State Park Road
8.1 mi · 14 min · State Park Road
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7
Turn left
1681 ft · 41 sec
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8
Merge slight left onto Keystone Shortway
165.4 mi · 3 hr · Keystone Shortway
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9
Take the exit slight right toward PA 940, PATP, I 476: Wilkes-Barre, Allentown
1.1 km · 1 min
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10
Keep slight left
1217 ft · 32 sec
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11
Keep slight right to continue on I 476 South: Allentown
1303 ft · 32 sec
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12
Merge slight left onto Pennsylvania Turnpike Northeast Extension
74.6 mi · 1 hr 21 min · Pennsylvania Turnpike Northeast Extension
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13
Continue on Pennsylvania Turnpike Northeast Extension
1558 ft · 24 sec · Pennsylvania Turnpike Northeast Extension
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14
Keep slight left to continue on Pennsylvania Turnpike Northeast Extension
1179 ft · 18 sec · Pennsylvania Turnpike Northeast Extension
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15
Continue on Mid-County Expressway
10.8 mi · 15 min · Mid-County Expressway
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16
Take the exit slight right toward PA 3: Upper Darby, Broomall
1670 ft · 59 sec
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17
Turn left onto West Chester Pike
2.5 mi · 5 min · West Chester Pike
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18
Turn slight right onto Darby Road
144 m · 14 sec · Darby Road
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19
Continue on Lansdowne Avenue
3 mi · 8 min · Lansdowne Avenue
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20
Turn right onto West Providence Road
1430 ft · 39 sec · West Providence Road
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21
Arrive at your destination
0 m · 1 sec · West Providence Road
Car Route Details
A richer read on the saved driving route between Saint Marys and Upper Darby.
Straightforward drive
The saved road route has a manageable number of maneuvers and should be easy to follow with normal attention to signs.
Keystone Shortway
Merge slight left onto Keystone Shortway
165 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.
Showers And Thunderstorms leaving Saint Marys and Mostly Sunny near Upper Darby.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Saint Marys to Upper Darby?
The road trip is about 266.7 miles (429.2 km) and usually takes 04h 49m 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 143 miles from Saint Marys and 123.7 miles from Upper Darby.
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 65.7 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 8:00 AM EDT. If you want a more comfortable same-day return, try to leave by 7:22 AM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $38.45 one way or $76.90 round trip. Estimated CO2 is about 83.6 kg one way.
What should you check before leaving?
Before you leave, expect Showers And Thunderstorms around Saint Marys and Mostly Sunny near Upper Darby.
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 Saint Marys and Upper Darby. Straight-line distance: 200.97 mi (323.43 km).
#1 Saint Marys
City in Camden County, Georgia, USA
| Population | 12,157 |
| Coordinates | 41.4278400, -78.5608600 |
| Altitude | 506 |
| Country | United States |
#2 Upper Darby
Town in Delaware County, Pennsylvania, United States
| Population | 82,883 |
| Coordinates | 39.9284500, -75.2738000 |
| Altitude | 20 |
| Country | United States |
End: West Providence Road (-75.273806, 39.928457)
Estimated Travel Time
Distance: 429 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 08h 53m |
| 40 mph (64.37 km/h) | 06h 40m |
| 50 mph (80.47 km/h) | 05h 20m |
| 60 mph (96.56 km/h) | 04h 26m |
| 70 mph (112.65 km/h) | 03h 48m |
| 80 mph (129 km/h) | 03h 19m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.09 | $38.45 | $76.90 |
| Mid-grade | $4.60 | $43.28 | $86.55 |
| Premium | $4.95 | $46.62 | $93.23 |
| Diesel | $5.98 | $56.27 | $112.54 |
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.