Airport · IPT · Williamsport, Pennsylvania
Williamsport, PA
Williamsport, PA posts top-5% on-time performance among the 382 tracked U.S. airports, as a smaller regional airport. According to the U.S. DOT Bureau of Transportation Statistics, drawn from 142 flights (2020–2025); its biggest delay driver is carrier.
Data updated 2026-06-13
- 90.1%
- On-time
- Top 3%
- on-time, US airports
- 193 min
- Delay when late
- 0.00%
- Cancelled
Key Performance Metrics
Total Flights
142
Best Month
Aug 96.4%
Worst Month
Oct 81.8%
Delayed
14
Cancelled
0
IPT on-time rate vs. the national average
Ahead of the U.S. average across all 382 tracked airports.
Where IPT sits among all 382 tracked airports
IPT's 90.1% on-time rate falls in the 90-95% band, the 12-airport band it shares.
National on-time-rate distribution
- 60-65% 1
1 airport between 60% and 65% on-time
1 airports
- 65-70% 4
4 airports between 65% and 70% on-time
4 airports
- 70-75% 9
9 airports between 70% and 75% on-time
9 airports
- 75-80% 48
48 airports between 75% and 80% on-time
48 airports
- 80-85%
192 airports between 80% and 85% on-time
192 airports
- 85-90%
116 airports between 85% and 90% on-time
116 airports
- 90-95% 12
12 airports between 90% and 95% on-time
12 airports
What this shows IPT is marked in the 90-95% band.
Delay Cause Breakdown
Top delay cause: Carrier. Total delay minutes: 585.
Seasonal Performance Patterns
Monthly averages across all years of data. Best month: August (96.4% on-time). Most delays: October (81.8% on-time).
| Month | Avg Flights | Avg Delayed | Avg Cancelled | On-Time % |
|---|---|---|---|---|
| October | 11 | 3 | 0 | 81.8% |
| September | 76 | 6 | 0 | 96.1% |
| August | 55 | 5 | 0 | 96.4% |
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
Monthly Performance
Recent 24 months of flight data.
| Period | Flights | Dep Delayed | Arr Delayed | Cancelled | Diverted |
|---|---|---|---|---|---|
| Oct 2020 | 11 | 2 | 1 | 0 | 0 |
| Sep 2020 | 76 | 3 | 3 | 0 | 0 |
| Aug 2020 | 55 | 2 | 3 | 0 | 0 |
Airports With a Similar On-Time Rate
Other U.S. airports nationwide whose on-time rate is closest to Williamsport, PA's 90.1%.
Other Airports in Pennsylvania
Compare performance with other Pennsylvania airports.
Philadelphia, PA
Philadelphia · 1,060,086 flights
Pittsburgh, PA
Pittsburgh · 462,554 flights
Harrisburg, PA
Harrisburg · 60,271 flights
Allentown/Bethlehem/Easton, PA
Allentown/Bethlehem/Easton · 48,496 flights
Scranton/Wilkes-Barre, PA
Scranton/Wilkes-Barre · 21,551 flights
State College, PA
State College · 9,139 flights
Latrobe, PA
Latrobe · 8,539 flights
Johnstown, PA
Johnstown · 7,267 flights
Keep exploring
More flight data around Williamsport, PA.
Pennsylvania flight data
Statewide on-time and delay aggregates, plus every reporting airport in Pennsylvania.
View PA data →Airport rankings
See where IPT sits among U.S. airports on on-time rate and average delay.
Best on-time airports →Compare airports
Put IPT head-to-head with another airport on delays and reliability.
Open comparison tool →What the Data Says About IPT
Williamsport, PA in Williamsport, Pennsylvania handled 142 flights in the Bureau of Transportation Statistics dataset between 2020 and 2020, posting a 90.1% on-time departure rate. Of those flights, 14 experienced delays, 0 were cancelled, and 0 were diverted. The cancellation rate works out to 0.00%, the diversion rate to 0.00%, and the average delay when departures run late is 192.6 minutes. These figures are the baseline for comparing IPT against other airports in the same state and nationally.
Breaking down what drives delays at IPT, Carrier leads the pack. Carrier accounts for 96.1% of total delay minutes, followed by NAS (National Aviation System) at 3.9% and Late Aircraft at 0.0%. Weather contributes 0.0% of delay minutes at this airport, while security holds the smallest share at 0.0%. Travelers often overestimate the weather share; the BTS categorization shows late-arriving aircraft and carrier operations as the larger contributors.
Seasonally, August runs the cleanest at IPT with a 96.4% on-time rate, while October is the roughest at 81.8% - a 15-point swing between best and worst month. Volume peaks in September, when average flights hit 76. Combine these numbers - 90.1% on-time, 192.6-minute average delay, 0.00% cancellation rate, and you have a concrete picture of departure reliability at Williamsport, PA.
Frequently Asked Questions
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Using IPT's data
An airport-level on-time rate is a starting point, not a guarantee for your specific flight.
- 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
- Scores vary by airline and route within the same airport; check the specific carrier you're flying. Browse airlines
On-time rate reflects the BTS historical average across all reporting carriers at this airport, not any single flight or airline.
Related
Source: U.S. Bureau of Transportation Statistics (BTS) Airline on-time performance and operational reliability · 2025
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. Airport figures are computed directly from BTS On-Time Performance data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.