How far is Decatur, PA from Allentown, PA?
The driving distance from Decatur, PA to Allentown, PA is about 143.6 miles (231.1 km), with a travel time of about 02h 28m by car.
- The straight-line flight distance is about 103.1 miles (165.9 km).
- For a round trip, plan for roughly 04h 56m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 8:00 AM to 10:00 AM EDT.
Reverse, save, or send this route
This route works well as a day trip with time at the destination. Copy the route link, send it to another device, or print a clean version before you head out.
This route works well as a day trip with time at the destination.
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 02h 28m.
A morning start gives you useful time at the destination and keeps the return out of the late evening.
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.
Census-designated place in Northumberland County, Pennsylvania
Route Weather Snapshot
Check the forecast at both ends before you head out.
Sunny
Driving Route Map
The map below follows the saved road route between Decatur and Allentown.
Turn-by-Turn Driving Directions
Step-by-step road directions between Decatur and Allentown.
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1
Start on Old Stage Road
1.3 km · 2 min · Old Stage Road
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2
Turn left onto Alfarata Road
2.1 mi · 5 min · Alfarata Road
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3
Turn left
24 mi · 27 min
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4
At the end of the road, turn right onto South Main Street
10.4 mi · 12 min · South Main Street
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5
Turn left onto Susquehanna Trail
3271 ft · 1 min · Susquehanna Trail
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6
Continue on North Susquehanna Trail
2.7 mi · 5 min · North Susquehanna Trail
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7
Take the exit slight right toward PA 61 South: Sunbury
1533 ft · 44 sec
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8
Continue straight
1.5 mi · 2 min
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9
Turn right onto Market Street
1.4 mi · 2 min · Market Street
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10
Continue on State Street
10 mi · 12 min · State Street
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11
Turn left
2.3 mi · 4 min
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12
Turn right onto South Market Street
1.5 mi · 2 min · South Market Street
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13
Continue on State Route 54
11.1 mi · 13 min · State Route 54
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14
Continue on Locust Gap Highway
1897 ft · 42 sec · Locust Gap Highway
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15
Continue on Fairgrounds Road
2.2 mi · 2 min · Fairgrounds Road
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16
Continue on Sunbury Road
9.4 mi · 11 min · Sunbury Road
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17
Continue on Sunbury Street
1.2 km · 1 min · Sunbury Street
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18
Turn right onto Pottsville Minersville Highway
1.8 mi · 2 min · Pottsville Minersville Highway
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19
Turn right onto Gordon Nagle Trail
4 mi · 7 min · Gordon Nagle Trail
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20
Continue on North Sillyman Street
1281 ft · 33 sec · North Sillyman Street
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21
Turn left onto Pottsville Street
1.1 km · 2 min · Pottsville Street
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22
Turn right onto Route 61 South
150 m · 6 sec · Route 61 South
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23
Continue on Center Avenue
10.6 mi · 13 min · Center Avenue
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24
Continue on Centre Street
2.7 mi · 4 min · Centre Street
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25
Take the exit slight right toward I 78 East, US 22 East: Allentown
1423 ft · 41 sec
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26
Merge slight left onto William Penn Highway
21.6 mi · 27 min · William Penn Highway
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27
Keep slight right to continue on Lehigh Valley Thruway
1.5 km · 1 min · Lehigh Valley Thruway
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28
Take the exit slight right toward Cetronia
1053 ft · 27 sec
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29
Turn straight onto Tilghman Street
4.9 mi · 8 min · Tilghman Street
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30
Arrive at your destination
0 m · 1 sec · Tilghman Street
Car Route Details
A richer read on the saved driving route between Decatur and Allentown.
Straightforward drive
The saved road route has a manageable number of maneuvers and should be easy to follow with normal attention to signs.
Longest stretch
Turn left
24 mi · 00h 27m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A comfortable day-trip route
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
Clear leaving Decatur and Sunny near Allentown.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Decatur to Allentown?
The road trip is about 143.6 miles (231.1 km) and usually takes 02h 28m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
What is the halfway point on this route?
Atlas is a useful midpoint, sitting about 64.7 miles from Decatur and 78.9 miles from Allentown.
How much longer is the road route than the straight-line distance?
The direct path is about 103.1 miles (165.9 km), while the road route adds roughly 40.5 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 8:00 AM to 10:00 AM EDT. If you want a more comfortable same-day return, try to leave by 1:34 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $20.72 one way or $41.43 round trip. Estimated CO2 is about 45.1 kg one way.
What should you check before leaving?
Before you leave, expect Clear around Decatur and Sunny near Allentown.
Stop Ideas Near Atlas
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 Atlas.
Wilkes-Barre, PA
White Haven, PA
Harrisburg Transportation Center
Middletown
Flight Path Map
This map shows the direct air route between Decatur and Allentown. Straight-line distance: 103.1 mi (165.93 km).
#1 Decatur
Township in Mifflin County, Pennsylvania
| Population | 3,070 |
| Coordinates | 40.6942400, -77.4538800 |
| Altitude | 207 |
| 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: 231 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 04h 47m |
| 40 mph (64.37 km/h) | 03h 35m |
| 50 mph (80.47 km/h) | 02h 52m |
| 60 mph (96.56 km/h) | 02h 23m |
| 70 mph (112.65 km/h) | 02h 03m |
| 80 mph (129 km/h) | 01h 47m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.09 | $20.72 | $41.43 |
| Mid-grade | $4.60 | $23.32 | $46.63 |
| Premium | $4.95 | $25.12 | $50.23 |
| Diesel | $5.98 | $30.32 | $60.64 |
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 31, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.