Pittsburgh International in May 2026

83.4%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 2026, reporting carriers scheduled 3,778 domestic departures from Pittsburgh International (PIT). 83.4% left less than 15 minutes late and 83.7% reached their destination on time; 0.8% were cancelled.

Nationally that month, 77.1% of flights departed on time and 77.6% arrived on time, so PIT departures were 6.3 points above the national departure figure.

A year earlier, in May 2025, the airport had 3,786 departures with 82.2% leaving on time: a change of +1.2 points, with flights down 0%.

Flights arriving at PIT that month were on time 79.3% of the time (3,779 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 43%, air carrier 29% and national aviation system 25%.

On time 83.7%
Arrived 15+ minutes late 15.3%
Cancelled 0.8%
Diverted 0.2%

Every scheduled departure from PIT in May 2026, judged by arrival at the destination.

May 2026 against a year earlier, the airport's year and the nation

Measure	May 2026	May 2025	PIT, 12 months to Jul 2026	All reported flights, May 2026
Departed on time	83.4%	82.2%	80.7%	77.1%
Arrived on time	83.7%	79.3%	79.7%	77.6%
Cancelled	0.8%	1.0%	2.0%	0.9%
Average departure delay (late minutes only)	11.8 min	13.3 min	14.4 min	16.0 min
Scheduled departures a day	126	126	117	20,391
Scheduled departures	3,778	3,786	42,857	611,735

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
YX Republic Airline	1,048	28%	89.4%	-5.9 min	1.0%
WN Southwest Airlines	888	24%	78.4%	6.2 min	0.0%
AA American Airlines	587	16%	81.8%	5.5 min	1.0%
UA United Airlines	370	10%	82.2%	2.4 min	0.5%
DL Delta Air Lines	318	8%	88.7%	-3.8 min	0.9%
B6 JetBlue Airways	152	4%	84.9%	0.9 min	0.7%
OO SkyWest Airlines	132	3%	82.6%	6.7 min	1.5%
G4 Allegiant Air	131	3%	82.4%	18.3 min	1.5%
OH PSA Airlines	55	1%	70.9%	8.5 min	3.6%
AS Alaska Airlines	50	1%	80.0%	-2.1 min	2.0%
F9 Frontier Airlines	24	1%	91.7%	-14.7 min	0.0%
MQ Envoy Air	20	1%	80.0%	5.0 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
PIT–ORD	Pittsburgh to Chicago	396	82.8%	5.6 min	1.0%
PIT–LGA	Pittsburgh to New York	259	87.6%	-3.8 min	1.2%
PIT–ATL	Pittsburgh to Atlanta	243	86.8%	-4.2 min	1.2%
PIT–BOS	Pittsburgh to Boston	204	90.2%	-6.8 min	0.0%
PIT–CLT	Pittsburgh to Charlotte	186	86.0%	-1.7 min	0.0%
PIT–MCO	Pittsburgh to Orlando	163	87.1%	1.8 min	0.0%
PIT–EWR	Pittsburgh to Newark	160	93.1%	-14.4 min	1.9%
PIT–JFK	Pittsburgh to New York	149	87.9%	-5.7 min	2.0%
PIT–DFW	Pittsburgh to Dallas/Fort Worth	133	78.2%	10.4 min	3.0%
PIT–DCA	Pittsburgh to Washington	122	74.6%	10.6 min	0.0%
PIT–PHL	Pittsburgh to Philadelphia	122	86.9%	-2.0 min	3.3%
PIT–DEN	Pittsburgh to Denver	119	77.3%	6.8 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 2026.

Delay causes

BTS cause category	Share of delay minutes	National, May 2026	Minutes
Air carrier	29.1%	33.0%	11,477
Late-arriving aircraft	42.5%	40.4%	16,772
National Aviation System	24.5%	20.5%	9,670
Extreme weather	3.7%	6.0%	1,476
Security	0.1%	0.1%	43

39,438 delay minutes on 577 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 2026?

83.4% of 3,778 scheduled domestic departures left less than 15 minutes late, and 83.7% reached their destination on time. The national figures that month were 77.1% and 77.6%.

How does that compare with a year earlier?

In May 2025, 82.2% of 3,786 departures left on time and 1.0% were cancelled, against 83.4% and 0.8% in May 2026.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for May 2026; 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.