Philadelphia International in September 2025

80.9%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 8,225 domestic departures from Philadelphia International (PHL). 80.9% left less than 15 minutes late and 81.3% reached their destination on time; 0.5% were cancelled.

Nationally that month, 83.1% of flights departed on time and 82.8% arrived on time, so PHL departures were 2.2 points below the national departure figure.

A year earlier, in September 2024, the airport had 9,023 departures with 83.6% leaving on time: a change of −2.7 points, with flights down 9%.

Flights arriving at PHL that month were on time 81.3% of the time (8,217 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 42%, air carrier 34% and national aviation system 22%.

On time 81.3%
Arrived 15+ minutes late 17.9%
Cancelled 0.5%
Diverted 0.3%

Every scheduled departure from PHL 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	PHL, 12 months to Jul 2026	All reported flights, Sep 2025
Departed on time	80.9%	83.6%	74.1%	83.1%
Arrived on time	81.3%	81.1%	73.4%	82.8%
Cancelled	0.5%	0.5%	2.7%	0.5%
Average departure delay (late minutes only)	13.3 min	11.6 min	20.2 min	12.2 min
Scheduled departures a day	274	301	276	18,748
Scheduled departures	8,225	9,023	100,793	562,439

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
AA American Airlines	4,224	51%	78.6%	2.8 min	0.6%
OH PSA Airlines	1,239	15%	86.4%	-4.5 min	0.6%
F9 Frontier Airlines	638	8%	80.6%	3.6 min	0.0%
DL Delta Air Lines	530	6%	90.0%	-5.1 min	0.0%
WN Southwest Airlines	437	5%	84.0%	1.4 min	0.0%
UA United Airlines	352	4%	84.9%	-3.2 min	0.6%
YX Republic Airline	350	4%	83.1%	-1.2 min	1.7%
NK Spirit Airlines	243	3%	84.4%	-2.7 min	0.8%
B6 JetBlue Airways	152	2%	63.8%	22.3 min	1.3%
AS Alaska Airlines	60	1%	80.0%	-3.7 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
PHL–ATL	Philadelphia to Atlanta	436	87.6%	-7.0 min	0.5%
PHL–BOS	Philadelphia to Boston	427	59.3%	18.7 min	2.3%
PHL–ORD	Philadelphia to Chicago	412	76.5%	5.6 min	0.2%
PHL–MCO	Philadelphia to Orlando	403	80.1%	6.8 min	0.2%
PHL–CLT	Philadelphia to Charlotte	291	88.7%	-6.2 min	0.3%
PHL–DEN	Philadelphia to Denver	283	83.4%	1.3 min	0.4%
PHL–DTW	Philadelphia to Detroit	267	88.0%	-6.1 min	0.7%
PHL–DFW	Philadelphia to Dallas/Fort Worth	258	78.3%	-1.4 min	1.9%
PHL–BNA	Philadelphia to Nashville	236	81.8%	-0.8 min	0.0%
PHL–MIA	Philadelphia to Miami	217	79.3%	2.0 min	0.9%
PHL–FLL	Philadelphia to Fort Lauderdale	213	82.2%	4.4 min	0.5%
PHL–LAX	Philadelphia to Los Angeles	211	86.7%	-6.0 min	0.5%

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	33.8%	34.3%	33,314
Late-arriving aircraft	41.6%	37.4%	41,004
National Aviation System	22.0%	22.6%	21,645
Extreme weather	2.6%	5.6%	2,533
Security	0.1%	0.1%	105

98,601 delay minutes on 1,470 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 PHL on time in September 2025?

80.9% of 8,225 scheduled domestic departures left less than 15 minutes late, and 81.3% 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, 83.6% of 9,023 departures left on time and 0.5% were cancelled, against 80.9% and 0.5% 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 PHL · methodology · corrections.