Origin
Smithfield, PA
Afternoon in Smithfield on Wednesday
Local time
4:24 PM
EDT
Current temp
58°F
Unavailable
Live forecast
Trip from Smithfield, PA to Allentown, PA
Last recalculated Apr 15, 2026
Drive Time
5h 26m
Distance
271.7 mi
437 km
Drive Score
9/10
Great drive
Same Day?
Yes, doable
Fuel Cost
$45
one way
Best Time to Leave
4 AM
5h 13m
★
6 AM
5h 26m
8 AM
5h 53m
10 AM
5h 36m
12 PM
5h 33m
3 PM
5h 37m
5 PM
5h 52m
8 PM
5h 18m
Estimated drive times based on typical traffic patterns. Actual times may vary with weather, construction, and real-time conditions.
Smithfield, PA
Wikimedia Commons
Allentown, PA
Wikimedia Commons
Trip Overview
The drive from Smithfield, PA to Allentown, PA covers 271.7 miles and takes about 5h 26m behind the wheel. This route is realistic as a one-day drive if you keep your stops efficient.
The route leans on Pennsylvania Turnpike, William Penn Highway, American Legion Memorial Highway for much of the mileage, and the overall profile is highway-focused drive. The longest uninterrupted segment is about 136.3 miles on Pennsylvania Turnpike. At current regular gas prices, budget about $45.04 one way before food or hotel costs.
Trip Pace
Same-day drive is realistic
A same-day return is possible, but it will make for a full day on the road.
Break Rhythm
1 planned break
Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
Midpoint
135.9 miles from Smithfield, PA
A natural place for your longest stop of the day , about 2h 41m into the drive .
Drive Character
This is a 5h 26m highway drive covering 271.7 miles, with most of the trip on Pennsylvania Turnpike and William Penn Highway. The longest continuous stretch is about 136.3 miles on Pennsylvania Turnpike.
Most of the miles stay on highways, which makes pacing and fuel planning easier than turn-by-turn city driving.
There are about 33 navigation steps in the underlying route data, so the final approach matters more than the middle miles.
Pennsylvania Turnpike is the longest continuous segment at about 136.3 miles.
How Hard Is This Drive?
This is a straightforward highway drive that stays mostly on Pennsylvania Turnpike and William Penn Highway. This route has several spots where lane changes, forks, or exits need your full attention. The trickiest moment comes around 175.2 miles in.
Route Complexity
10/10
High effort - long or complex enough to need steady focus all day
This is a demanding drive. With 21 significant decision points across 271.7 miles, you will need to stay alert — especially through interchange areas and urban stretches. Consider splitting it into segments if you are not comfortable with fast highway navigation.
Where does it get tricky?
The main spots that need attention: at 175.2 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 176 miles: Highway fork - watch signs carefully. Lane positioning matters here; at 190.5 miles: Highway fork - watch signs carefully. Multiple destination signs - pick the right one.
Critical Maneuvers
5 of 21 key pointsThese are the spots where you need to pay the most attention. Preview them before you drive.
7
175.2 mi into trip
|
~3h 25m in
Take the exit toward I 81, US 11: Carlisle, Harrisburg
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight right lane.
Toward I 81, US 11: Carlisle, Harrisburg
7
176 mi into trip
|
~3h 27m in
Keep slight left at fork toward US 11 North: Harrisburg
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight right lanes.
Toward US 11 North: Harrisburg
6
190.5 mi into trip
|
~3h 46m in
Keep slight left at fork toward US 11 North, US 15 North: Marysville
Highway fork - watch signs carefully. Multiple destination signs - pick the right one
Toward US 11 North, US 15 North: Marysville
6
195.5 mi into trip
|
~3h 53m in
|
I 81 / American Legion Memorial Highway
Keep slight left at fork onto I 81 / American Legion Memorial Highway
Highway fork - watch signs carefully. Lane positioning matters here
Use the straight / slight right lanes.
9
265.6 mi into trip
|
~5h 16m in
|
US 22 / Lehigh Valley Thruway
Keep slight right at fork onto US 22 / Lehigh Valley Thruway toward US 22 East: Pennsylvania Turnpike, LVI Airport
Highway fork - watch signs carefully. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight right lane.
Exit 51
Toward US 22 East: Pennsylvania Turnpike, LVI A...
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between Smithfield, PA and Allentown, PA, road signs point toward Patp, Harrisburg and Marysville.
Patp
38.5 mi in
|
~53m
Harrisburg
175.2 mi in
|
~3h 25m
Marysville
190.4 mi in
|
~3h 46m
Main Roads
| Road | Distance | Duration |
|---|---|---|
| Pennsylvania Turnpike | 136.3 mi | 2h 30m |
| William Penn Highway | 42.8 mi | 50m |
| American Legion Memorial Highway | 22.5 mi | 27m |
| I 81 | 12.7 mi | 15m |
| US 119 | 12.4 mi | 14m |
| Mon/Fayette Expressway | 8 mi | 10m |
| Pleasant Valley Road | 7.9 mi | 13m |
| 78th Division Highway | 7.6 mi | 8m |
Longest stretch:
Pennsylvania Turnpike
— 136.3 mi, about 2h 30m
Turn-by-Turn Driving Directions
Step-by-step road directions between Smithfield, PA and Allentown, PA.
1
Start on US 119
0.4 mi
·
37 sec
·
Morgantown Street
2
Continue on US 119
1.5 mi
·
2 min
·
Morgantown Road
3
Turn right onto Big Six Road
0.3 mi
·
31 sec
·
Big Six Road
4
Turn left
0.2 mi
·
30 sec
5
Continue on PA 43
1.6 mi
·
1 min
·
Mon-Fayette Expressway
6
Continue on PA 43
8.0 mi
·
10 min
·
Mon/Fayette Expressway
7
Continue on US 119
12 mi
·
14 min
·
US 119
8
Take the exit
244 ft
·
6 sec
9
Turn straight onto PA 982
7.9 mi
·
13 min
·
Pleasant Valley Road
10
Turn right onto PA 31
6.0 mi
·
9 min
·
PA 31
11
Turn slight left
0.2 mi
·
33 sec
12
Turn left
28 ft
·
3 sec
13
Take the ramp
493 ft
·
12 sec
Toward PATP, I 70, I 76
14
Keep slight right at fork
0.2 mi
·
35 sec
15
Merge onto I 70; I 76; PATP
136 mi
·
2 hr 30 min
·
Pennsylvania Turnpike
16
Take the exit
0.9 mi
·
2 min
Toward I 81, US 11: Carlisle, Harrisburg
Use the slight right lane.
17
Keep slight left at fork
0.3 mi
·
54 sec
Toward US 11 North: Harrisburg
Use the straight / slight right lanes.
18
Continue on US 11
1.1 mi
·
2 min
·
Harrisburg Pike
Use the straight lane.
19
Take the exit
0.3 mi
·
34 sec
Toward I 81 North: Harrisburg
20
Merge onto I 81
13 mi
·
15 min
·
I 81
Use the straight / right lanes.
21
Take the exit
0.2 mi
·
14 sec
Toward US 11, US 15: Enola, Marysville
22
Keep slight left at fork
0.3 mi
·
28 sec
Toward US 11 North, US 15 North: Marysville
23
Keep slight left at fork
0.4 mi
·
32 sec
24
Merge onto I 81
0.7 mi
·
1 min
·
George N. Wade Memorial Bridge
Use the straight / slight right lanes.
25
Continue on I 81
3.4 mi
·
4 min
·
American Legion Memorial Highway
26
Keep slight left at fork onto I 81
19 mi
·
22 min
·
American Legion Memorial Highway
Use the straight / slight right lanes.
27
Take the exit
0.7 mi
·
45 sec
Exit 89
Toward I 78 East: Allentown
28
Continue on I 78
7.6 mi
·
8 min
·
78th Division Highway
29
Continue on I 78; US 22
43 mi
·
50 min
·
William Penn Highway
Use the straight lane.
30
Keep slight right at fork onto US 22
1.0 mi
·
1 min
·
Lehigh Valley Thruway
Exit 51
Toward US 22 East: Pennsylvania Turnpike, LVI Airport
Use the slight right lane.
31
Take the exit
0.2 mi
·
26 sec
Toward Cetronia
Use the slight right lane.
32
Turn straight onto Tilghman Street
4.9 mi
·
8 min
·
Tilghman Street
Use the straight lane.
33
Arrive at destination
Tilghman Street
Trip Plan
Morning Departure
An early start around 7-8 AM gets you there with plenty of daylight left.
Evening Departure
A late afternoon start means arriving after dark. Morning is better.
You can normally do this drive in one day.
Plan roughly 1 meaningful break for fuel, food, and rest.
The halfway point lands around 135.9 miles from Smithfield, PA, or about 2h 41m into the drive.
The longest continuous stretch on this route runs about 136.3 miles.
This is a comfortable same-day trip.
Departure
Before you leave
Start with fuel, water, and navigation already sorted so the first hour feels easy.
First stop
Around 80 miles or 1h 39m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 135.9 miles or 2h 41m in
This is the best place for your longest stop, a real meal, and a full fuel check.
Final approach
Final hour starts around 4h 25m
Traffic, exits, and arrival timing usually matter more near Allentown, PA than in the middle of the route.
Before You Leave
+
Open the route before leaving Smithfield, PA so your first major turns are already loaded.
+
Leave with enough water and a charging cable within reach, not packed away.
+
Check your fuel range against the first long segment, especially if you are starting outside city service areas.
Day 1
Settle into the route from Smithfield, PA
This is one driving day of about 271.7 miles and 5h 26m.
Your first comfortable stop window is around 80 miles from Smithfield, PA.
This route can stay practical as a one-day drive if traffic stays reasonable.
Plan about 1 real break rather than only quick fuel stops.
The longest stretch is on Pennsylvania Turnpike for about 136.3 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Halfway Point
Midpoint
About 135.9 mi from Smithfield, PA · 2h 41m into the drive
Mid-route town
Meal stop
136 mi into the route
Best for: Lunch, fuel, and a longer reset
This sits close to the middle of the route, so it works well for the longest stop of the day.
Pacing Suggestions
Fuel and coffee
A short stop after about 80 miles helps settle the day before fatigue starts building.
Meal break
The midpoint is around 135.9 miles from Smithfield, PA, which is a good place for a longer meal and fuel stop.
Before the longest stretch
Fuel checkTop up before Pennsylvania Turnpike if your tank is already low. That segment runs about 136.3 miles.
Arriving in Allentown, PA
The final approach into Allentown, PA usually feels slower than the middle of the drive, so avoid planning your tightest schedule at the very end.
Try to arrive with enough fuel left to skip an immediate station stop unless you already know the area around Allentown, PA.
After long uninterrupted mileage, take five minutes before the last urban segment to reset and refocus on exits, merges, and city traffic.
These stop ideas are pacing suggestions — the exact town or exit can change with traffic, hotel plans, and fuel range.
Fuel & Cost
Regular Gas
$45.04 one way
$90.09 round trip
$4.21/gal
25.4 MPG avg
95 kg CO2
| Fuel Type | $/gal | One Way | Round Trip |
|---|---|---|---|
| midgrade | $4.61 | $49.33 | $98.67 |
| premium | $4.93 | $52.69 | $105.39 |
| diesel | $5.61 | $59.99 | $119.98 |
Estimated Tolls: $17.79
Pennsylvania Turnpike
(136.3 mi)
$17.72
Lehigh Valley Thruway
(1 mi)
$0.07
Toll estimates based on average 2024-2025 rates. EZ-Pass/SunPass discounts may lower the actual cost.
Estimated Trip Cost (one way, 1 person)
Fuel
$45
Tolls
$18
Meals
$25–$50
Total
$88–$113
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 95.1 kg one way. Prices: EIA weekly data, 2026-04-13.
Driving Electric?
About $29 in charging · 1 stop · 66% less CO2
| Vehicle Type | kWh | Stops | DC Fast | Home Charge |
|---|---|---|---|---|
| Average EV | 81.5 | 1 | $28.53 | $13.04 |
| Efficient EV | 67.9 | 0 | $23.77 | $10.87 |
| EV Truck/SUV | 108.7 | 1 | $38.04 | $17.39 |
Gas CO2
95 kg
EV CO2
32 kg (66% less)
Plan for 1 charging stop. A 30-minute DC fast charge mid-route should be enough to complete the trip comfortably.
DC fast charging avg $0.35/kWh. Home charging avg $0.16/kWh. US grid CO2: 0.39 kg/kWh.
Travel Intel
Current conditions at both ends of the drive.
Destination
Allentown, PA
Afternoon in Allentown on Wednesday
Local time
4:24 PM
EDT
Current temp
58°F
Scattered Showers And Thunderstorms
SW 0 to 10 mph
36% chance
Live forecast
Special Weather Statement
Special Weather Statement issued April 13 at 11:55PM EDT by NWS Cleveland OH
Special Weather Statement
Special Weather Statement issued April 13 at 11:47PM EDT by NWS Cleveland OH
57°F
Cuba, NY
136 mi in
Seasonal Notes
Summer travel usually means heavier construction, hotter rest stops, and busier weekend traffic around major cities.
Winter travel shortens daylight, so a route that looks manageable on paper can feel much longer after dark.
Holiday weekends tend to make both departure and arrival windows slower than the raw route time suggests.
Time zone
Same local time
Origin and destination are on the same clock, so arrival timing is easier to judge at a glance.
Temperature spread
Very similar conditions
Both ends of the route are sitting at about the same temperature right now.
Road read
5h 26m on the road
An early start around 7-8 AM gets you there with plenty of daylight left.
Weather data from the National Weather Service. Conditions may change; check closer to your travel date.
Frequently Asked Questions
The drive from Smithfield, PA to Allentown, PA covers 271.7 miles and takes about 5h 26m without stops. Add 15-30 minutes for a fuel or rest stop on longer drives.
The main roads are Pennsylvania Turnpike, William Penn Highway, American Legion Memorial Highway. Most of the drive stays on highways, so watch for ramps and exits.
This is a comfortable same-day trip.
The midpoint is about 135.9 miles from Smithfield, PA. Look for rest areas, gas stations, or food options near the halfway mark.
At current regular gas prices, expect to spend about $45.04 one way. This estimate uses 25.4 MPG — your actual cost will vary with your vehicle's fuel efficiency and current gas prices.
An early start around 7-8 AM gets you there with plenty of daylight left. A late afternoon start means arriving after dark. Morning is better.
Plan about 1 meaningful break for fuel, food, or rest. Plan on a short reset every 3 to 4 hours to stay fresh behind the wheel.
This is a demanding drive. With 21 significant decision points across 271.7 miles, you will need to stay alert — especially through interchange areas and urban stretches. Consider splitting it into segments if you are not comfortable with fast highway navigation.
The main spots that need attention: at 175.2 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 176 miles: Highway fork - watch signs carefully. Lane positioning matters here; at 190.5 miles: Highway fork - watch signs carefully. Multiple destination signs - pick the right one.
Between Smithfield, PA and Allentown, PA, road signs point toward Patp, Harrisburg and Marysville.
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