Philadelphia International in August 2025

71.0%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 August 2025, reporting carriers scheduled 9,120 domestic departures from Philadelphia International (PHL). 71.0% left less than 15 minutes late and 71.0% reached their destination on time; 1.3% were cancelled.

Nationally that month, 76.8% of flights departed on time and 76.3% arrived on time, so PHL departures were 5.8 points below the national departure figure.

A year earlier, in August 2024, the airport had 10,241 departures with 65.2% leaving on time: a change of +5.8 points, with flights down 11%.

Flights arriving at PHL that month were on time 73.3% of the time (9,122 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 46%, air carrier 34% and national aviation system 18%.

On time 71.0%
Arrived 15+ minutes late 27.3%
Cancelled 1.3%
Diverted 0.4%

Every scheduled departure from PHL in August 2025, judged by arrival at the destination.

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

Measure	Aug 2025	Aug 2024	PHL, 12 months to Jul 2026	All reported flights, Aug 2025
Departed on time	71.0%	65.2%	74.1%	76.8%
Arrived on time	71.0%	63.1%	73.4%	76.3%
Cancelled	1.3%	4.9%	2.7%	1.1%
Average departure delay (late minutes only)	23.4 min	29.0 min	20.2 min	17.6 min
Scheduled departures a day	304	341	276	20,079
Scheduled departures	9,120	10,241	100,793	602,378

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
AA American Airlines	4,718	52%	67.5%	19.3 min	1.1%
OH PSA Airlines	1,156	13%	75.8%	11.3 min	2.5%
F9 Frontier Airlines	769	8%	70.9%	11.0 min	1.3%
YX Republic Airline	585	6%	75.6%	7.1 min	1.4%
DL Delta Air Lines	573	6%	82.7%	3.2 min	1.6%
WN Southwest Airlines	445	5%	74.6%	15.8 min	0.0%
UA United Airlines	350	4%	78.0%	7.4 min	2.6%
NK Spirit Airlines	338	4%	67.2%	13.8 min	0.3%
B6 JetBlue Airways	124	1%	67.7%	7.2 min	0.0%
AS Alaska Airlines	62	1%	59.7%	12.1 min	1.6%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
PHL–ATL	Philadelphia to Atlanta	508	76.0%	5.8 min	2.0%
PHL–MCO	Philadelphia to Orlando	454	63.0%	23.4 min	0.2%
PHL–ORD	Philadelphia to Chicago	439	64.5%	24.4 min	3.2%
PHL–BOS	Philadelphia to Boston	406	75.9%	6.5 min	1.5%
PHL–DEN	Philadelphia to Denver	309	75.1%	11.4 min	0.6%
PHL–DFW	Philadelphia to Dallas/Fort Worth	290	66.6%	16.4 min	2.4%
PHL–CLT	Philadelphia to Charlotte	285	73.7%	10.8 min	1.4%
PHL–MIA	Philadelphia to Miami	269	67.7%	20.7 min	0.4%
PHL–DTW	Philadelphia to Detroit	268	79.9%	4.5 min	1.1%
PHL–FLL	Philadelphia to Fort Lauderdale	253	64.8%	14.0 min	0.4%
PHL–LAX	Philadelphia to Los Angeles	252	75.4%	13.4 min	0.4%
PHL–BNA	Philadelphia to Nashville	246	76.4%	8.5 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), August 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Aug 2025	Minutes
Air carrier	33.8%	33.1%	66,180
Late-arriving aircraft	46.1%	40.5%	90,385
National Aviation System	17.9%	19.2%	34,995
Extreme weather	2.1%	7.0%	4,130
Security	0.1%	0.1%	251

195,941 delay minutes on 2,489 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 August 2025?

71.0% of 9,120 scheduled domestic departures left less than 15 minutes late, and 71.0% reached their destination on time. The national figures that month were 76.8% and 76.3%.

How does that compare with a year earlier?

In August 2024, 65.2% of 10,241 departures left on time and 4.9% were cancelled, against 71.0% and 1.3% in August 2025.

Provenance

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