Pittsburgh International in September 2025

86.3%departed on time

BTS: A flight is counted as on time if it arrived less than 15 minutes after its scheduled time. Only carriers with at least 0.5 percent of domestic scheduled passenger revenue report.

In September 2025, reporting carriers scheduled 3,672 domestic departures from Pittsburgh International (PIT). 86.3% left less than 15 minutes late and 85.6% reached their destination on time; 0.7% were cancelled.

Nationally that month, 83.1% of flights departed on time and 82.8% arrived on time, so PIT departures were 3.2 points above the national departure figure.

A year earlier, in September 2024, the airport had 3,764 departures with 89.0% leaving on time: a change of −2.7 points, with flights down 2%.

Flights arriving at PIT that month were on time 83.8% of the time (3,671 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 33%, air carrier 33% and national aviation system 30%.

On time 85.6%
Arrived 15+ minutes late 13.7%
Cancelled 0.7%
Diverted 0.1%

Every scheduled departure from PIT in September 2025, judged by arrival at the destination.

September 2025 against a year earlier, the airport's year and the nation

Measure	Sep 2025	Sep 2024	PIT, 12 months to Jul 2026	All reported flights, Sep 2025
Departed on time	86.3%	89.0%	80.7%	83.1%
Arrived on time	85.6%	88.1%	79.7%	82.8%
Cancelled	0.7%	0.3%	2.0%	0.5%
Average departure delay (late minutes only)	10.2 min	8.9 min	14.4 min	12.2 min
Scheduled departures a day	122	126	117	18,748
Scheduled departures	3,672	3,764	42,857	562,439

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
YX Republic Airline	1,045	28%	84.9%	-1.3 min	1.4%
WN Southwest Airlines	805	22%	87.5%	-1.6 min	0.0%
AA American Airlines	443	12%	84.7%	7.8 min	0.9%
UA United Airlines	362	10%	90.1%	-4.9 min	0.0%
DL Delta Air Lines	288	8%	93.8%	-10.0 min	0.0%
NK Spirit Airlines	172	5%	83.7%	2.4 min	1.2%
B6 JetBlue Airways	154	4%	71.4%	9.6 min	1.3%
OO SkyWest Airlines	135	4%	80.7%	3.0 min	0.7%
G4 Allegiant Air	94	3%	84.0%	2.8 min	0.0%
OH PSA Airlines	71	2%	78.9%	16.3 min	0.0%
AS Alaska Airlines	52	1%	84.6%	-10.2 min	0.0%
F9 Frontier Airlines	26	1%	73.1%	14.0 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
PIT–ORD	Pittsburgh to Chicago	345	82.0%	2.2 min	0.3%
PIT–LGA	Pittsburgh to New York	294	84.4%	1.5 min	2.0%
PIT–ATL	Pittsburgh to Atlanta	235	95.7%	-10.4 min	0.0%
PIT–BOS	Pittsburgh to Boston	197	65.5%	10.1 min	3.0%
PIT–EWR	Pittsburgh to Newark	183	88.0%	-7.3 min	2.7%
PIT–JFK	Pittsburgh to New York	178	84.8%	1.8 min	0.6%
PIT–DEN	Pittsburgh to Denver	167	86.2%	-4.0 min	0.0%
PIT–MCO	Pittsburgh to Orlando	151	83.4%	3.4 min	0.0%
PIT–CLT	Pittsburgh to Charlotte	146	89.7%	0.9 min	0.0%
PIT–PHL	Pittsburgh to Philadelphia	122	74.6%	16.7 min	0.0%
PIT–DFW	Pittsburgh to Dallas/Fort Worth	120	77.5%	14.6 min	3.3%
PIT–DCA	Pittsburgh to Washington	118	89.0%	-3.5 min	0.0%

By scheduled departure hour

On-time share:under 62%6270768288% and over

Share of departures that left less than 15 minutes late, by scheduled hour (local time), September 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Sep 2025	Minutes
Air carrier	32.7%	34.3%	11,466
Late-arriving aircraft	33.2%	37.4%	11,647
National Aviation System	30.2%	22.6%	10,615
Extreme weather	3.9%	5.6%	1,381
Security	0.0%	0.1%	0

35,109 delay minutes on 502 flights that arrived 15 or more minutes late and carried a cause report. Carriers assign the categories; see what each category means.

Questions and answers

How many flights left PIT on time in September 2025?

86.3% of 3,672 scheduled domestic departures left less than 15 minutes late, and 85.6% reached their destination on time. The national figures that month were 83.1% and 82.8%.

How does that compare with a year earlier?

In September 2024, 89.0% of 3,764 departures left on time and 0.3% were cancelled, against 86.3% and 0.7% in September 2025.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for September 2025; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for PIT · methodology · corrections.