How far is Bethlehem, PA from Mercersburg, PA?
The driving distance from Bethlehem, PA to Mercersburg, PA is about 160.3 miles (258 km), with a travel time of about 03h 21m by car.
- The straight-line flight distance is about 144.5 miles (232.6 km).
- For a round trip, plan for roughly 06h 42m 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 03h 21m.
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.
Census designated place
Route Weather Snapshot
Check the forecast at both ends before you head out.
Driving Route Map
The map below follows the saved road route between Bethlehem and Mercersburg.
Turn-by-Turn Driving Directions
Step-by-step road directions between Bethlehem and Mercersburg.
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1
Start on Linden Street
112 m · 13 sec · Linden Street
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2
Turn right onto East Union Boulevard
1.3 km · 2 min · East Union Boulevard
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3
Take the ramp right
1240 ft · 30 sec
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4
Merge slight left onto Bethlehem Spur Route
2.3 mi · 3 min · Bethlehem Spur Route
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5
Keep slight left to continue on US 22 West: Allentown
1.3 km · 2 min
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6
Merge slight left onto Lehigh Valley Thruway
9.8 mi · 13 min · Lehigh Valley Thruway
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7
Merge slight left onto William Penn Highway
43.1 mi · 52 min · William Penn Highway
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8
Continue on 78th Division Highway
7.6 mi · 9 min · 78th Division Highway
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9
Keep slight left to continue on I 81 South: Harrisburg
1.1 km · 49 sec
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10
Merge slight left
83.4 mi · 1 hr 40 min
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11
Take the exit slight right toward PA 16: Waynesboro, Greencastle
1052 ft · 34 sec
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12
Turn right onto Buchanan Trail East
1127 ft · 27 sec · Buchanan Trail East
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13
Continue on East Baltimore Street
1.5 km · 3 min · East Baltimore Street
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14
Continue on Buchanan Trail West
9.6 mi · 14 min · Buchanan Trail West
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15
Continue on South Main Street
1946 ft · 1 min · South Main Street
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16
Turn right onto East Seminary Street
71 m · 15 sec · East Seminary Street
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17
Turn right onto JEB Stuart Alley
38 m · 9 sec · JEB Stuart Alley
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18
Arrive at your destination
0 m · 1 sec · JEB Stuart Alley
Car Route Details
A richer read on the saved driving route between Bethlehem and Mercersburg.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
I 81 South
Merge slight left
83.4 mi · 01h 40m
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.
Sunny leaving Bethlehem and Sunny near Mercersburg.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Bethlehem to Mercersburg?
The road trip is about 160.3 miles (258 km) and usually takes 03h 21m 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?
Linglestown is a useful midpoint, sitting about 80 miles from Bethlehem and 80.3 miles from Mercersburg.
How much longer is the road route than the straight-line distance?
The direct path is about 144.5 miles (232.6 km), while the road route adds roughly 15.8 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 10:18 AM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $23.13 one way or $46.25 round trip. Estimated CO2 is about 50.3 kg one way.
What should you check before leaving?
Before you leave, expect Sunny around Bethlehem and Sunny near Mercersburg.
Stop Ideas Near Linglestown
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 Linglestown.
Harrisburg Transportation Center
Middletown
Elizabethtown station
Mount Joy
Flight Path Map
This map shows the direct air route between Bethlehem and Mercersburg. Straight-line distance: 144.54 mi (232.61 km).
#1 Bethlehem
The second most populous city in Northampton County, Pennsylvania.
| Population | 74,892 |
| Coordinates | 40.6259300, -75.3704600 |
| Altitude | 109 |
| Country | United States |
#2 Mercersburg
Borough of Pennsylvania
| Population | 1,527 |
| Coordinates | 39.8278700, -77.9033300 |
| Altitude | 173 |
| Country | United States |
End: Mercersburg (-77.90333, 39.82787)
Estimated Travel Time
Distance: 258 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 05h 20m |
| 40 mph (64.37 km/h) | 04h 00m |
| 50 mph (80.47 km/h) | 03h 12m |
| 60 mph (96.56 km/h) | 02h 40m |
| 70 mph (112.65 km/h) | 02h 17m |
| 80 mph (129 km/h) | 02h 00m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $4.09 | $23.13 | $46.25 |
| Mid-grade | $4.60 | $26.03 | $52.06 |
| Premium | $4.95 | $28.04 | $56.08 |
| Diesel | $5.98 | $33.85 | $67.69 |
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 23, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.