How far is Upper Darby, PA from Mars, PA?
The driving distance from Upper Darby, PA to Mars, PA is about 317 miles (510.2 km), with a travel time of about 06h 05m by car.
- The straight-line flight distance is about 255.1 miles (410.6 km).
- For a round trip, plan for roughly 12h 11m 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 05m.
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.
Township in Franklin County, Pennsylvania
Route Weather Snapshot
Check the forecast at both ends before you head out.
Widespread Frost then Sunny
Driving Route Map
The map below follows the saved road route between Upper Darby and Mars.
Turn-by-Turn Driving Directions
Step-by-step road directions between Upper Darby and Mars.
-
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
-
11
Keep slight left to continue on Mall Boulevard
1331 ft · 21 sec
-
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
288.1 mi · 5 hr 13 min · Pennsylvania Turnpike
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16
Take the exit slight right toward PA 8: Butler Valley, Pittsburgh, Butler
1282 ft · 54 sec
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17
Keep slight right to continue on PA 8 North: Butler
152 m · 12 sec
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18
Merge slight left onto William Flinn Highway
2.5 mi · 5 min · William Flinn Highway
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19
Turn right onto Heckert Road
1583 ft · 1 min · Heckert Road
-
20
Turn left onto Bakerstown Road
4.1 mi · 7 min · Bakerstown Road
-
21
Turn sharp right onto Babcock Boulevard
1.5 km · 2 min · Babcock Boulevard
-
22
Turn left onto Mars Valencia Road
1.7 mi · 3 min · Mars Valencia Road
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23
Continue on Irvine Street
1021 ft · 21 sec · Irvine Street
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24
Turn right onto Crowe Avenue
11 m · 1 sec · Crowe Avenue
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25
Arrive at your destination
0 m · 1 sec · Crowe Avenue
Car Route Details
A richer read on the saved driving route between Upper Darby and Mars.
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
288 mi · 05h 13m
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.
Sunny leaving Upper Darby and Widespread Frost then Sunny near Mars.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Upper Darby to Mars?
The road trip is about 317 miles (510.2 km) and usually takes 06h 05m 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?
Metal is a useful midpoint, sitting about 158.3 miles from Upper Darby and 158.8 miles from Mars.
How much longer is the road route than the straight-line distance?
The direct path is about 255.1 miles (410.6 km), while the road route adds roughly 61.9 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 $45.72 one way or $91.44 round trip. Estimated CO2 is about 99.4 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Upper Darby and Widespread Frost then Sunny near Mars.
Stop Ideas Near Metal
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 Metal.
Hancock, MD
Hagerstown, MD
Huntingdon
Martinsburg station
Flight Path Map
This map shows the direct air route between Upper Darby and Mars. Straight-line distance: 255.15 mi (410.63 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 Mars
Borough in Butler County, Pennsylvania, USA
| Population | 1,608 |
| Coordinates | 40.6959000, -80.0117300 |
| Altitude | 317 |
| Country | United States |
End: Mars (-80.01173, 40.6959)
Estimated Travel Time
Distance: 510 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 10h 33m |
| 40 mph (64.37 km/h) | 07h 55m |
| 50 mph (80.47 km/h) | 06h 20m |
| 60 mph (96.56 km/h) | 05h 17m |
| 70 mph (112.65 km/h) | 04h 31m |
| 80 mph (129 km/h) | 03h 57m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.09 | $45.72 | $91.44 |
| Mid-grade | $4.60 | $51.46 | $102.93 |
| Premium | $4.95 | $55.44 | $110.87 |
| Diesel | $5.98 | $66.92 | $133.83 |
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.