How far is Saint Marys, PA from Allentown, PA?
The driving distance from Saint Marys, PA to Allentown, PA is about 233.5 miles (375.8 km), with a travel time of about 04h 10m by car.
- The straight-line flight distance is about 169.8 miles (273.2 km).
- For a round trip, plan for roughly 08h 20m 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 10m.
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.
Township in southern Perry 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 Allentown.
Turn-by-Turn Driving Directions
Step-by-step road directions between Saint Marys and Allentown.
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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
112.7 mi · 2 hr 1 min · Keystone Shortway
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9
Take the exit slight right toward PA 54: Danville, Washingtonville
1080 ft · 27 sec
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10
Turn slight left
24 m · 3 sec
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11
Turn right onto Continental Boulevard
2.9 mi · 4 min · Continental Boulevard
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12
Continue on Factory Street
716 ft · 20 sec · Factory Street
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13
Continue on Danville-Riverside Bridge Road
1799 ft · 49 sec · Danville-Riverside Bridge Road
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14
Turn left onto Elysburg Road
9.7 mi · 11 min · Elysburg Road
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15
Continue on State Route 54
11.1 mi · 13 min · State Route 54
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16
Continue on Locust Gap Highway
1897 ft · 42 sec · Locust Gap Highway
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17
Continue on Fairgrounds Road
2.2 mi · 2 min · Fairgrounds Road
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18
Continue on Sunbury Road
9.4 mi · 11 min · Sunbury Road
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19
Continue on Sunbury Street
1.2 km · 1 min · Sunbury Street
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20
Turn right onto Pottsville Minersville Highway
1.8 mi · 2 min · Pottsville Minersville Highway
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21
Turn right onto Gordon Nagle Trail
4 mi · 7 min · Gordon Nagle Trail
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22
Continue on North Sillyman Street
1281 ft · 33 sec · North Sillyman Street
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23
Turn left onto Pottsville Street
1.1 km · 2 min · Pottsville Street
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24
Turn right onto Route 61 South
150 m · 6 sec · Route 61 South
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25
Continue on Center Avenue
10.6 mi · 13 min · Center Avenue
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26
Continue on Centre Street
2.7 mi · 4 min · Centre Street
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27
Take the exit slight right toward I 78 East, US 22 East: Allentown
1423 ft · 41 sec
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28
Merge slight left onto William Penn Highway
21.6 mi · 27 min · William Penn Highway
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29
Keep slight right to continue on Lehigh Valley Thruway
1.5 km · 1 min · Lehigh Valley Thruway
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30
Take the exit slight right toward Cetronia
1053 ft · 27 sec
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31
Turn straight onto Tilghman Street
4.9 mi · 8 min · Tilghman Street
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32
Arrive at your destination
0 m · 1 sec · Tilghman Street
Car Route Details
A richer read on the saved driving route between Saint Marys and Allentown.
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
113 mi · 02h 01m
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 Allentown.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Saint Marys to Allentown?
The road trip is about 233.5 miles (375.8 km) and usually takes 04h 10m 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?
Carroll is a useful midpoint, sitting about 112.7 miles from Saint Marys and 120.9 miles from Allentown.
How much longer is the road route than the straight-line distance?
The direct path is about 169.8 miles (273.2 km), while the road route adds roughly 63.7 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 8:40 AM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $33.67 one way or $67.34 round trip. Estimated CO2 is about 73.2 kg one way.
What should you check before leaving?
Before you leave, expect Showers And Thunderstorms around Saint Marys and Mostly Sunny near Allentown.
Stop Ideas Near Carroll
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 Carroll.
Lewistown
Harrisburg Transportation Center
Huntingdon
Tyrone
Flight Path Map
This map shows the direct air route between Saint Marys and Allentown. Straight-line distance: 169.78 mi (273.24 km).
#1 Saint Marys
City in Camden County, Georgia, USA
| Population | 12,157 |
| Coordinates | 41.4278400, -78.5608600 |
| Altitude | 506 |
| Country | United States |
#2 Allentown
The third most populous city in Pennsylvania.
| Population | 121,470 |
| Coordinates | 40.6084300, -75.4901800 |
| Altitude | 103 |
| Country | United States |
End: Tilghman Street (-75.490007, 40.608068)
Estimated Travel Time
Distance: 376 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 07h 46m |
| 40 mph (64.37 km/h) | 05h 50m |
| 50 mph (80.47 km/h) | 04h 40m |
| 60 mph (96.56 km/h) | 03h 53m |
| 70 mph (112.65 km/h) | 03h 20m |
| 80 mph (129 km/h) | 02h 54m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.09 | $33.67 | $67.34 |
| Mid-grade | $4.60 | $37.90 | $75.79 |
| Premium | $4.95 | $40.82 | $81.64 |
| Diesel | $5.98 | $49.28 | $98.55 |
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.