Interstate 180 Pennsylvania

Interstate 180 Pennsylvania
Interstate 180 Pennsylvania
Williamsport, PA ↔ Milton, PA•28.84 miles

Overview

Interstate 180 spurs north from I-80 and PA 147 near the borough of Milton to Williamsport and the Lycoming Valley. The rural freeway mirrors the course of the Susquehanna River West Branch north from McEwensville to Muncy. Turning west ahead of the former Lycoming Mall, I-180 travels around the borough of Montoursville by Williamsport Regional Airport (IPT) to Downtown Williamsport.

U.S. 220 overlaps with Interstate 180 from Montoursville west to Williamsport and the Susquehanna Beltway. U.S. 15 accompanies I-180 between the Market Street Bridge to South Williamsport and the west end at Lycoming Creek. Interstate 99 overlaps with U.S. 15 north from the end of I-180 to the New York state line. U.S. 220 west from I-180 to Lock Haven and I-80 is part of the future I-99 corridor.

Mileage by State

Pennsylvania28.84 mi

Data Sources

December 31, 2021 Interstate Route Log and Finders List

History

I-80 east at PA 147/I-180 - 1993
The exchange joining I-80 with I-180 in Turbot Township was originally numbered Exits 31 A/B. 12/17/93

Interstate 180 was established by the American Association of State Highway and Transportation Officials (AASHTO) on October 1, 1983 after the final segment of the freeway along PA 147 between I-80 and Williamsport opened to traffic in 1982. Work on the initial segment of PA 147 started in 1969 (Kitsko, 2022).

Lock Haven/Williamsport area - 1975 PA Official Map
The freeway along Pennsylvania Route 147 under construction on the 1975 Pennsylvania Official Highway Map.

East End Interstate 80 Pennsylvania Route 147 ‐ Milton, PA

Interstate 180 East at Interstate 80 Pennsylvania Route 147

The East end of Interstate 180 in Pennsylvania

Interstate 80 trends southeast from I-180 to cross Limestone Ridge into Liberty township. The freeway proceeds east from Mooresburg through Frosty Valley to the town of Bloomsburg. 07/25/24

I-180 east at I-80/PA 147 - Delaware Twp I-180 east at I-80/PA 147 - Delaware Twp I-180 east at I-80/PA 147 - Turbot Twp The East end of Interstate 180 in Pennsylvania

Pennsylvania Route 147 North at Interstate 80 Interstate 180

PA 147 north at I-180/80 - Turbot Twp

PA 147 north concludes as I-180 begins below the Interstate 80 center line. The state route historically extended 26 miles north into Williamsport. 07/24/24

PA 147 north at I-180/80 - Turbot Twp PA 147 north at I-180/80 - Turbot Twp PA 147 north at I-180/80 - Turbot Twp PA 147 north at I-180/80 - Turbot Twp

Interstate 80 East at Interstate 180 Pennsylvania Route 147

I-80 east at I-180/PA 147 - White Deer Twp

An auxiliary lane opens along Interstate 80 eastbound across the Susquehanna River West Branch to Exit 212 A for PA 147 south to Milton and Exit 212 B for I-180 west to Williamsport. 07/25/24

I-80 east at I-180/PA 147 - White Deer Twp I-80 east at I-180/PA 147 - White Deer Twp I-80 east at I-180/PA 147 - Turbot Twp I-80 east at I-180 west to Williamsport, PA

Interstate 80 West at Interstate 180 Pennsylvania Route 147

I-80 west at I-180/PA 147 - Turbot Twp

The I-80 roadways separate leading into the cloverleaf interchange (Exits 212 B/A) with Interstate 180 and PA 147. 07/25/24

I-80 west at I-180/PA 147 - Turbot Twp I-80 west at I-180/PA 147 - Turbot Twp I-80 west at I-180/PA 147 - Turbot Twp I-80 west at I-180/PA 147 - Turbot Twp

East End – Past Views

Past Views Gallery (Tap to Expand / Collapse Section)

Interstate 180 at Interstate 80 Pennsylvania Route 147

I-180 east at I-80/PA 147 - 2005

An end sign for Interstate 180 was previously posted just south of I-80. PA 147 extends the freeway along the east side of Milton southward to the community of Montandon. 05/07/05

I-180 east at I-80/PA 147 - Delaware Twp I-180 east at I-80/PA 147 in 2017 I-180 east at I-80/PA 147 - Turbot Twp I-180 east at I-80/PA 147 - 2002 I-180 east at I-80/PA 147 - 2005 I-80 west 2 miles ahead of I-180/PA 147 in 2005

West End Interstate 99 U.S. 15 U.S. 220 ‐ Williamsport, PA

Interstate 180 West U.S. 15 North U.S. 220 South

I-180 west at US 15/220 - Williamsport, PA

Interstate 180 concludes one mile west of the diamond interchange (Exit 28) joining the freeway with Maynard Street and the Pennsylvania College of Technology. 07/25/24

I-180 west at US 15/220 - Williamsport, PA I-180 west at US 15/220 - Williamsport, PA I-180 west at US 15/220 - Williamsport, PA

Interstate 99 U.S. 15 South at Interstate 180 U.S. 220

US 15 south at 4th Street - Williamsport, PA

U.S. 15 runs along side Lycoming Creek south from the Garden View community in Old Lycoming township to enter Williamsport at 4th Street (old U.S. 220). I-180 commences along side U.S. 15 south at forthcoming U.S. 220 (Susquehanna Beltway). 01/18/17

US 15 south at 4th Street - Williamsport, PA I-99/US 15 South at I-180/US 220 in Williamsport, PA I-99/US 15 South at I-180 East and US 220 North US 15 south at I-180 - Williamsport, PA

U.S. 220 North at Interstate 99 Interstate 180 U.S. 15

US 220 North at I-99 North, I-180 East and US 15

Interstate 180 begins at the trumpet interchange (Exit 29) joining U.S. 220 with I-99/U.S. 15 north to Mansfield. I-180 accompanies U.S. 15 south and U.S. 220 east to Downtown Williamsport. 07/25/24

West End – Past Views

Past Views Gallery (Tap to Expand / Collapse Section)

U.S. 15 U.S. 220 at Interstate 180

US 220 north at I-180/US 15 - Williamsport, PA

Button copy overheads previously posted where U.S. 220 north meets U.S. 15 and Interstate 180 in Williamsport. 05/07/05

I-180 west at US 15/220 - Williamsport, PA US 220 north at I-180/US 15 - Williamsport, PA US 15 south at I-180/US 220 Williamsport, PA US 15 south at I-180/US 220 - Williamsport, PA US 220 north at I-180/US 15 - Williamsport, PA

References

Kitsko, J. (2022, September 30). Interstate 180. Pennsylvania Highways. Retrieved from https://www.pahighways.com/interstates/I180.html
Updated August 11, 2026