Phoenix Sky Harbor International in August 2025

79.4%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 August 2025, reporting carriers scheduled 14,380 domestic departures from Phoenix Sky Harbor International (PHX). 79.4% left less than 15 minutes late and 80.4% reached their destination on time; 0.4% were cancelled.

Nationally that month, 76.8% of flights departed on time and 76.3% arrived on time, so PHX departures were 2.6 points above the national departure figure.

A year earlier, in August 2024, the airport had 15,416 departures with 78.9% leaving on time: a change of +0.5 points, with flights down 7%.

Flights arriving at PHX that month were on time 80.6% of the time (14,390 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 42%, air carrier 38% and national aviation system 16%.

On time 80.4%
Arrived 15+ minutes late 18.9%
Cancelled 0.4%
Diverted 0.3%

Every scheduled departure from PHX 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	PHX, 12 months to Jul 2026	All reported flights, Aug 2025
Departed on time	79.4%	78.9%	76.1%	76.8%
Arrived on time	80.4%	78.4%	77.4%	76.3%
Cancelled	0.4%	0.7%	0.9%	1.1%
Average departure delay (late minutes only)	14.5 min	15.0 min	15.8 min	17.6 min
Scheduled departures a day	479	514	542	20,079
Scheduled departures	14,380	15,416	197,642	602,378

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	5,128	36%	78.9%	6.8 min	0.2%
AA American Airlines	4,082	28%	78.1%	7.2 min	0.6%
OO SkyWest Airlines	1,760	12%	85.8%	0.9 min	0.1%
DL Delta Air Lines	846	6%	89.5%	-4.1 min	0.2%
MQ Envoy Air	795	6%	89.1%	-2.0 min	0.0%
UA United Airlines	726	5%	76.4%	11.1 min	1.0%
F9 Frontier Airlines	526	4%	75.1%	13.6 min	1.1%
AS Alaska Airlines	407	3%	77.6%	3.8 min	1.5%
B6 JetBlue Airways	31	0%	80.6%	0.1 min	3.2%
HA Hawaiian Airlines	31	0%	87.1%	34.2 min	0.0%
NK Spirit Airlines	26	0%	80.8%	5.3 min	0.0%
G4 Allegiant Air	22	0%	81.8%	3.1 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
PHX–LAX	Phoenix to Los Angeles	617	81.7%	5.7 min	0.0%
PHX–DEN	Phoenix to Denver	613	70.8%	13.7 min	0.8%
PHX–SEA	Phoenix to Seattle	584	79.8%	2.1 min	0.5%
PHX–SAN	Phoenix to San Diego	474	78.7%	9.3 min	0.4%
PHX–LAS	Phoenix to Las Vegas	464	84.3%	0.4 min	0.9%
PHX–SLC	Phoenix to Salt Lake City	429	84.8%	0.4 min	0.2%
PHX–ORD	Phoenix to Chicago	416	76.0%	9.6 min	1.9%
PHX–SNA	Phoenix to Santa Ana	367	78.5%	3.9 min	0.5%
PHX–DFW	Phoenix to Dallas/Fort Worth	363	70.5%	16.7 min	1.9%
PHX–SFO	Phoenix to San Francisco	341	73.0%	13.1 min	0.0%
PHX–ATL	Phoenix to Atlanta	301	86.4%	-3.0 min	0.3%
PHX–PDX	Phoenix to Portland	272	80.9%	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), August 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Aug 2025	Minutes
Air carrier	37.6%	33.1%	67,857
Late-arriving aircraft	41.5%	40.5%	74,877
National Aviation System	16.3%	19.2%	29,390
Extreme weather	4.4%	7.0%	7,879
Security	0.3%	0.1%	479

180,482 delay minutes on 2,718 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 PHX on time in August 2025?

79.4% of 14,380 scheduled domestic departures left less than 15 minutes late, and 80.4% 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, 78.9% of 15,416 departures left on time and 0.7% were cancelled, against 79.4% and 0.4% 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 PHX · methodology · corrections.