Pittsburgh International in May 2025

82.2%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 May 2025, reporting carriers scheduled 3,786 domestic departures from Pittsburgh International (PIT). 82.2% left less than 15 minutes late and 79.3% reached their destination on time; 1.0% were cancelled.

Nationally that month, 76.7% of flights departed on time and 75.4% arrived on time, so PIT departures were 5.5 points above the national departure figure.

A year earlier, in May 2024, the airport had 3,796 departures with 78.6% leaving on time: a change of +3.6 points, with flights down 0%.

Flights arriving at PIT that month were on time 75.0% of the time (3,783 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, national aviation system 41%, late-arriving aircraft 33% and air carrier 18%.

On time 79.3%
Arrived 15+ minutes late 19.5%
Cancelled 1.0%
Diverted 0.2%

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

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

Measure	May 2025	May 2024	PIT, 12 months to Jul 2026	All reported flights, May 2025
Departed on time	82.2%	78.6%	80.7%	76.7%
Arrived on time	79.3%	76.5%	79.7%	75.4%
Cancelled	1.0%	1.2%	2.0%	1.0%
Average departure delay (late minutes only)	13.3 min	16.3 min	14.4 min	17.5 min
Scheduled departures a day	126	127	117	20,188
Scheduled departures	3,786	3,796	42,857	605,648

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	867	23%	79.2%	5.3 min	0.3%
YX Republic Airline	838	22%	79.8%	7.7 min	1.8%
AA American Airlines	597	16%	76.7%	7.8 min	1.2%
DL Delta Air Lines	363	10%	85.1%	0.1 min	0.0%
UA United Airlines	334	9%	80.5%	4.2 min	0.3%
NK Spirit Airlines	150	4%	77.3%	4.9 min	2.7%
MQ Envoy Air	140	4%	80.7%	5.3 min	2.1%
G4 Allegiant Air	138	4%	83.3%	10.6 min	0.0%
B6 JetBlue Airways	128	3%	77.3%	7.1 min	1.6%
OH PSA Airlines	95	3%	74.7%	12.9 min	2.1%
OO SkyWest Airlines	57	2%	84.2%	0.4 min	0.0%
AS Alaska Airlines	48	1%	75.0%	5.7 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
PIT–ORD	Pittsburgh to Chicago	321	85.7%	-1.2 min	0.6%
PIT–ATL	Pittsburgh to Atlanta	254	87.4%	-1.4 min	0.0%
PIT–LGA	Pittsburgh to New York	244	73.4%	16.6 min	2.0%
PIT–PHL	Pittsburgh to Philadelphia	201	63.2%	20.7 min	2.0%
PIT–BOS	Pittsburgh to Boston	182	75.8%	9.1 min	1.1%
PIT–CLT	Pittsburgh to Charlotte	180	84.4%	5.4 min	1.1%
PIT–MCO	Pittsburgh to Orlando	175	70.3%	10.7 min	0.0%
PIT–JFK	Pittsburgh to New York	155	82.6%	9.0 min	1.3%
PIT–DCA	Pittsburgh to Washington	146	84.2%	2.4 min	2.1%
PIT–DEN	Pittsburgh to Denver	136	75.0%	11.0 min	0.0%
PIT–EWR	Pittsburgh to Newark	134	65.7%	18.8 min	9.0%
PIT–DFW	Pittsburgh to Dallas/Fort Worth	122	71.3%	14.5 min	0.8%

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), May 2025.

Delay causes

BTS cause category	Share of delay minutes	National, May 2025	Minutes
Air carrier	18.2%	29.3%	9,422
Late-arriving aircraft	33.0%	37.8%	17,037
National Aviation System	41.4%	25.9%	21,399
Extreme weather	7.1%	6.9%	3,672
Security	0.2%	0.1%	103

51,633 delay minutes on 738 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 May 2025?

82.2% of 3,786 scheduled domestic departures left less than 15 minutes late, and 79.3% reached their destination on time. The national figures that month were 76.7% and 75.4%.

How does that compare with a year earlier?

In May 2024, 78.6% of 3,796 departures left on time and 1.2% were cancelled, against 82.2% and 1.0% in May 2025.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for May 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.