Allentown to Upper Saint Clair is 282.6 miles and takes about 5 hours 49 minutes via Pennsylvania Turnpike, William Penn Highway, and I 81, with a fuel budget near $47 and enough daylight to finish in a day. This trip stays entirely within Pennsylvania, moving from the Northeast region toward the west. With most of the drive on highways, expect a fairly direct path. This is a solid option for a single-day trip if you're looking to cover ground efficiently within the state.
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
141.3 miles from Allentown, PA
A natural place for your longest stop of the day
, about 2h 49m into the drive
.
Main Roads
Road
Distance
Duration
Pennsylvania Turnpike
159.6 mi
2h 55m
William Penn Highway
43.1 mi
51m
I 81
36.6 mi
44m
78th Division Highway
7.6 mi
8m
Lincoln Way
6.2 mi
11m
Tilghman Street
5 mi
8m
Lebanon Church Road
3.9 mi
6m
Lincoln Highway
3.3 mi
6m
Longest stretch:
Pennsylvania Turnpike
— 159.6 mi, about 2h 55m
Traffic on I-81
Hour-of-day weekday pattern from 56 FHWA count stations on your route.
Peak
4 PM
~2,821 veh/hr typical
· worst 3,332
Quietest
1 AM
~392 veh/hr
Peak-to-quiet ratio
7.2×
busier at peak than in the quiet hours
12a6anoon6p11p
Averaged across 101 weeks of 2023 FHWA Travel Monitoring Analysis System data. Weekday hours only (Mon–Fri).
Turn-by-Turn Driving Directions
Step-by-step road directions between Allentown, PA and Upper Saint Clair, PA.
1
Start on Tilghman Street
5.0 mi·8 min·Tilghman Street
Use the straight lane.
2
Take the ramp
0.1 mi·18 sec
Toward US 22 West: Harrisburg
3
Merge onto US 22
0.7 mi·54 sec·Lehigh Valley Thruway
4
Merge onto I 78; US 22
43 mi·51 min·William Penn Highway
Use the straight lane.
5
Continue on I 78; US 22
7.6 mi·8 min·78th Division Highway
6
Keep slight left at fork
0.7 mi·49 sec
Exit 1BToward I 81 South: Harrisburg
7
Merge onto I 81
37 mi·44 min·I 81
8
Take the exit
0.3 mi·48 sec
Exit 52Toward US 11: New Kingstown, MiddlesexUse the slight right lane.
9
Keep slight right at fork
201 ft·7 sec
Toward US 11 SouthUse the right lane.
10
Merge onto US 11
1.0 mi·2 min·Harrisburg Pike
Use the straight / right lanes.
11
Take the exit
0.5 mi·1 min
Toward I 76, PATP
12
Keep slight right at fork
0.2 mi·37 sec
Toward I 76 West: PittsburghUse the slight right lane.
13
Merge onto I 76; PATP
160 mi·2 hr 55 min·Pennsylvania Turnpike
14
Take the exit
0.6 mi·1 min
Exit 67Toward US 30: Irwin, McKeesportUse the slight right lane.
15
Keep slight left at fork
0.3 mi·39 sec
Toward US 30 West: PittsburghUse the slight left / slight right lanes.
16
Merge onto US 30
3.3 mi·6 min·Lincoln Highway
Use the straight lane.
17
Turn left onto Lincoln Way
6.2 mi·11 min·Lincoln Way
Use the straight lane.
18
Turn left onto PA 148; Yellow Belt
1.0 mi·2 min·5th Avenue
19
Turn straight onto PA 148; Yellow Belt
1.1 mi·1 min·Lysle Boulevard
Use the straight / right lanes.
20
Continue on Yellow Belt
0.1 mi·15 sec·Jerome Street Bridge
21
Continue on Yellow Belt
0.6 mi·59 sec·West 5th Avenue
22
Keep slight left at fork onto Yellow Belt
0.5 mi·1 min·West 5th Avenue
23
Continue on Yellow Belt
0.4 mi·34 sec·Richland Avenue
24
Continue on Yellow Belt
0.5 mi·47 sec·Pittsburgh McKeesport Boulevard
25
Turn slight left onto Yellow Belt
3.9 mi·6 min·Lebanon Church Road
26
Continue on Yellow Belt
1.3 mi·2 min·Curry Hollow Road
27
Continue on Yellow Belt
0.2 mi·25 sec·Brownsville Road
28
Turn right onto Broughton Road
1.8 mi·3 min·Broughton Road
Use the straight lane.
29
Turn left onto Baptist Road
0.6 mi·1 min·Baptist Road
30
Continue on South Park Road
2.1 mi·4 min·South Park Road
31
Turn right onto Drake Road
0.5 mi·1 min·Drake Road
32
At end of road, turn left onto Bethel Church Road
217 ft·12 sec·Bethel Church Road
33
Turn right onto Orange Belt
1.2 mi·3 min·McMurray Road
Use the right lane.
34
Turn left onto Morrow Road
0.5 mi·1 min·Morrow Road
35
Turn left onto Mill Grove Road
0.3 mi·1 min·Mill Grove Road
36
Turn left onto Swanson Lane
170 ft·7 sec·Swanson Lane
37
Arrive at destination
Swanson Lane
Trip Plan
Given the 5 hour 49 minute duration, leaving Allentown in the morning should get you to Upper Saint Clair by late afternoon. The $47 fuel cost is an estimate, so factor in current prices. With only one recommended stop, you can choose a convenient point along the Pennsylvania Turnpike for a break. The longest stretch without a major highway change is over 159 miles, so plan for a longer segment of consistent driving there. This route is manageable in a single day, allowing for flexibility in your departure time.
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 141.3 miles from Allentown, PA, or about 2h 49m into the drive.
The longest continuous stretch on this route runs about 159.6 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 62 miles or 1h 16m in
Use this first pause for coffee, a restroom break, and a quick traffic check ahead.
Halfway reset
Around 141.3 miles or 2h 49m 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 29m
Traffic, exits, and arrival timing usually matter more near Upper Saint Clair, PA than in the middle of the route.
Before You Leave
+
Open the route before leaving Allentown, 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 Allentown, PA
This is one driving day of about 282.6 miles and 5h 49m.
Your first comfortable stop window is around 62 miles from Allentown, 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 159.6 miles.
Where to Stop
Rest stops, refuel points, and overnight suggestions along this route.
Place data sourced from public business listings. Hours and availability may vary.
Heads-up: tricky spots
5 of 26
5 decision points cluster between mile 93.8 and 256 — GPS handles the exact turns, but know they're coming. Your lane choice matters more than the turn itself.
8
93.8 mi into trip|~1h 54m in
Take the exit toward US 11: New Kingstown, Middlesex
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight right lane.
Exit 52
Toward US 11: New Kingstown, Middlesex
8
94.1 mi into trip|~1h 55m in
Keep slight right at fork toward US 11 South
Highway fork - watch signs carefully. Lane positioning matters here
Use the right lane.
Toward US 11 South
7
95.6 mi into trip|~1h 59m in
Keep slight right at fork toward I 76 West: Pittsburgh
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight right lane.
Toward I 76 West: Pittsburgh
8
255.4 mi into trip|~4h 55m in
Take the exit toward US 30: Irwin, McKeesport
Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one
Use the slight right lane.
Exit 67
Toward US 30: Irwin, McKeesport
7
256 mi into trip|~4h 56m in
Keep slight left at fork toward US 30 West: Pittsburgh
Highway fork - watch signs carefully. Lane positioning matters here
Use the slight left / slight right lanes.
Toward US 30 West: Pittsburgh
Fuel & Cost
Regular Gas
$49.64 one way
$99.29 round trip
$4.46/gal25.4 MPG avg99 kg CO2
Fuel Type
$/gal
One Way
Round Trip
midgrade
$4.93
$54.87
$109.75
premium
$5.32
$59.13
$118.27
diesel
$6.57
$73.09
$146.17
Estimated Tolls: $20.80
Pennsylvania Turnpike
(159.6 mi)$20.75
Lehigh Valley Thruway
(0.7 mi)$0.05
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
$50
Tolls
$21
Meals
$25–$50
Total
$95–$120
Rough estimate based on US averages. Hotel $80–$140/night, meals $25–$50/day.
Estimated CO2 emission: 98.9 kg one way.
Driving Electric?
About $30 in charging
· 1 stop
· 67% less CO2
Vehicle Type
kWh
Stops
DC Fast
Home Charge
Average EV
84.8
1
$29.67
$13.56
Efficient EV
70.7
0
$24.73
$11.30
EV Truck/SUV
113
1
$39.56
$18.09
Gas CO2
99 kg
EV CO2
33 kg (67% 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.
Forecast as of Oct 17, 2026
Origin
Allentown, PA
Late night
in Allentown on Sunday
Local time
2:12 AM
EDT
Current temp
52°F
Partly Sunny
N 10 to 15 mph12% chanceLive forecast
Freeze Warning
Freeze Warning issued October 17 at 2:10AM EDT until October 18 at 9:00AM EDT by NWS Mount Holly NJ
Freeze Warning
Freeze Warning issued October 17 at 2:10AM EDT until October 18 at 9:00AM EDT by NWS Mount Holly NJ
Destination
Upper Saint Clair, PA
Late night
in Upper Saint Clair on Sunday
Local time
2:12 AM
EDT
Current temp
51°F
Isolated Rain Showers then Mostly Sunny
N 9 to 15 mph20% chanceLive forecast
Freeze Warning
Freeze Warning issued October 17 at 2:10AM EDT until October 18 at 9:00AM EDT by NWS Mount Holly NJ
Freeze Warning
Freeze Warning issued October 17 at 2:10AM EDT until October 18 at 9:00AM EDT by NWS Mount Holly NJ
40°F
King, PA
141 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
1 degrees cooler at arrival
A meaningful temperature swing is a good cue to rethink layers, water, and how soon you want to arrive.
Road read
5h 49m 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.
National Parks Near This Route
Worth a detour if your schedule allows.
Carlisle Federal Indian Boarding School National Monument
National Monument
More than 7,800 children from 140 Tribes went to the Carlisle School from 1879 to 1918. The National Park Service will collaborate with families, affiliated Tribal Nations, the US Army, historians, an...
The Appalachian Trail is a 2,190+ mile long public footpath that traverses the scenic, wooded, pastoral, wild, and culturally resonant lands of the Appalachian Mountains. Conceived in 1921, built by p...
5 mi from route
~11 min detour
Free
near mile 48.7
On Tuesday morning, September 11, 2001, the U.S. came under attack when four commercial airliners were hijacked and used to strike targets on the ground. Nearly 3,000 people tragically lost their live...
6 mi from route
~15 min detour
Free
near mile 204.6
The battle at Fort Necessity in the summer of 1754 was the opening action of the French and Indian War. This war was a clash of British, French and American Indian cultures. It ended with the removal...
24 mi from route
~59 min detour
Free
near mile 233.8
The South Fork Dam failed on Friday, May 31, 1889, and unleashed 20,000,000 tons of water that devastated Johnstown, PA. The flood killed 2,209 people but it brought the nation and the world together...
24 mi from route
~60 min detour
Free
near mile 185.1
Park data from the National Park Service API. Alerts update every 2 hours.
More Details
What kind of drive is this?
You'll spend about 69% of the 282.6 miles on highways. The longest continuous stretch on a highway is 159.6 miles, primarily on the Pennsylvania Turnpike. After this main highway segment, expect to transition to surface roads like the William Penn Highway. This route features a significant amount of highway driving, so be prepared for the typical pace and exit density associated with interstates.
69% highway — fuel and pacing are the main things to plan.
37 navigation steps total — most of the decisions cluster near the start and finish.
Longest single stretch: 159.6 mi on Pennsylvania Turnpike.
How Hard Is This Drive?
10/10
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 93.8 miles in.
Driving Effort10/10
High effort - long or complex enough to need steady focus all day
Balances navigation complexity with total wheel time.
This is a demanding drive. With 26 significant decision points across 282.6 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 93.8 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 94.1 miles: Highway fork - watch signs carefully. Lane positioning matters here; at 95.6 miles: Highway fork - watch signs carefully. Lane positioning matters here.
Elevation Profile
Gently rolling terrain
2,520 ft346 ft
Total Climb
2,716 ft
Total Descent
1,981 ft
Highest Point
2,520 ft
~222 mi in
Elevation Range
2,174 ft
Towns Mentioned on Route Signs
Based on OSRM destination-sign hints, not a full list of every settlement the road passes.
Between Allentown, PA and Upper Saint Clair, PA, road signs point toward Middlesex, Patp and Mckeesport.
Allentown is the largest city in the Lehigh Valley region of eastern Pennsylvania, the county seat and largest city in Lehigh County, and the third-largest city in Pennsylvania after Philadelphia and Pittsburgh with a population of 125,845 as of 2020.
Top landmarks
•Albertus L. Meyers Bridge — bridge in United States of America
•Allentown Masonic Temple — masonic temple in Allentown, Pennsylvania
•Allentown National Bank — bank building in Allentown, Pennsylvania
Doable as a same-day drive at 5h 49m. Total distance: 282.6 miles.
Family Friendly
Moderate complexity with 1 natural rest stops along the way.
Solo Traveler
5h 49m drive, comfortable solo distance.
Frequently Asked Questions
The longest stretch is about 159.6 miles on Pennsylvania Turnpike. The full list of main roads is in the Roads section above.
Expect about $20.80 in tolls one way, starting with Pennsylvania Turnpike. Most Northeast and Midwest toll agencies accept E-ZPass; in the West and Texas, transponders like TxTag or FasTrak apply. If you do not have a transponder, cashless tolling plates will mail a bill to the vehicle's registered address — usually with a surcharge, so a rental-car toll pass is often cheaper than paying by mail.
Yes — we found about 23 rest areas or service plazas within a short detour of the route (from OpenStreetMap). See the Rest Stops tab under Nearby Places for locations and mile markers. Plan to stretch, use the bathroom, and top off fluids every 2–3 hours on longer drives.
It helps. This route has a higher-than-average number of complex decision points, which get harder in the dark. If the last hour of the trip is on surface roads or mountain grades, aim to arrive at Upper Saint Clair, PA before sunset when you can. Check the Trip Plan for departure windows that land you in daylight.
Only with planning. This is a long drive for kids — consider splitting it into two days rather than pushing through. Plan at least 1 meaningful breaks. There are 23 rest areas along the route for bathroom stops.
The main spots that need attention: at 93.8 miles: Exit ramp - move to the correct lane early. Lane positioning matters here. Multiple destination signs - pick the right one; at 94.1 miles: Highway fork - watch signs carefully. Lane positioning matters here; at 95.6 miles: Highway fork - watch signs carefully. Lane positioning matters here.
Yes — Carlisle Federal Indian Boarding School National Monument, Appalachian National Scenic Trail and Flight 93 National Memorial (5 total within detour distance). See the National Parks section for detour distances and tips on detours.
Not recommended in a single day. At 5.8 hours each way, a round trip means 11.6 hours of driving — that is an unsafe level of fatigue for most drivers. Plan at least one night at Upper Saint Clair, PA before the return drive.
