According to PlainFlights' airport traffic ranking (BTS On-Time Performance total flights), Williamsport, PA (IPT) ranks #382 of 382 tracked US airports by total flights (most flights = #1). Williamsport, PA posts top-5% on-time performance among the 382 tracked U.S. airports, as a smaller regional airport.
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IPT on-time rate vs. the national average
Ahead of the U.S. average across all 382 tracked airports.
Delay Cause Breakdown
Top delay cause: Carrier.
Total delay minutes: 585.
Late Aircraft0.0% (0 min)
Carrier96.1% (562 min)
NAS (National Aviation System)3.9% (23 min)
Weather0.0% (0 min)
Security0.0% (0 min)
Cancellation & Diversion Analysis
Flight disruption statistics for Williamsport, PA.
Cancellation Rate
0.00%
0 of 142 flights
Diversion Rate
0.00%
0 of 142 flights
Delay Rate
9.9%
14 of 142 flights
Nationwide peers by on-time rate & flight volume
Two PlainFlights-derived comparison paths for Williamsport, PA, both outside Pennsylvania so the neighborhoods are not same-state geography. Axes stay disjoint: volume peers exclude the on-time peer set. Same-state compare stays below.
The standout signal at Williamsport, PA is the delay mix: Carrier owns 96.1% of 585 delay minutes across 142 BTS flights. The on-time headline is 90.1% (11.1 pts above the 79% national average), with 14 delayed and 0 cancelled (0.00%).
Delay minutes concentrate in Carrier (0.0% late-aircraft, 96.1% carrier, 3.9% NAS, 0.0% weather, 0.0% security). As a quieter airport, a single late inbound can swing the month more than at a mega-hub.
On the multi-year calendar, IPT is strongest in August (96.4% on-time) and weakest in October (81.8%), a 14.6-point swing. Volume peaks in September (~76 flights/month). Field definitions: on-time performance explained.
Williamsport, PA vs. the national on-time distribution
On-time rate among all 382 tracked U.S. airports
90.1%Top 3%higher than 97% of 382 airports
Williamsport, PA
60%95%
U.S. airports by on-time rate, bucketed by value
Each bar is a band; taller bars hold more airports. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data (2020–2020).
Statistics reflect cumulative performance across all available reporting periods. On-time rates exclude cancelled and diverted flights.
IPT's on-time book is stronger than most peers; the remaining risk sits in the delay mix, not a weak headline rate.
Compare IPT against airports with a similar on-time rate. Compare airports →
Travel in August rather than October if your dates are flexible. Seasonal patterns →
Gate-to-wheels taxi-out averages 11.6 min here; check the monthly series before a tight connection. Taxi times →
On-time rate reflects the BTS historical average across all reporting carriers at this airport, not any single flight or airline.
Frequently Asked Questions
What is Williamsport, PA's on-time rate?
Williamsport, PA (IPT) has a 90.1% on-time rate across 142 BTS-tracked flights (2020-2020), 11.1 pts above the 79% national flight-weighted average; that places it in roughly the top-5% on-time performance.
How does IPT rank among U.S. airports by traffic volume?
Williamsport, PA ranks #382 of 382 tracked US airports by total BTS flights (most flights = #1), making it a smaller regional airport.
What's the most common cause of delays at Williamsport, PA?
Carrier is the leading delay cause at IPT, accounting for 96.1% of delay minutes. The full breakdown: 0.0% late-aircraft, 96.1% carrier, 3.9% NAS/air-traffic-control, 0.0% weather, and 0.0% security.
When is the best time to fly through Williamsport, PA?
August is historically IPT's strongest month at 96.4% on-time, while October is the weakest at 81.8%, a 14.6-point swing across the BTS historical record.
Data sourced from U.S. Department of Transportation Bureau of Transportation Statistics (BTS) On-Time Performance data. See our methodology for details. Retrieved and formatted by PlainFlights