Phoenix Sky Harbor International in May 2025

78.8%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 17,223 domestic departures from Phoenix Sky Harbor International (PHX). 78.8% left less than 15 minutes late and 79.0% reached their destination on time; 0.4% were cancelled.

Nationally that month, 76.7% of flights departed on time and 75.4% arrived on time, so PHX departures were 2.1 points above the national departure figure.

A year earlier, in May 2024, the airport had 16,741 departures with 74.3% leaving on time: a change of +4.5 points, with flights up 3%.

Flights arriving at PHX that month were on time 80.4% of the time (17,215 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 39%, late-arriving aircraft 36% and national aviation system 24%.

On time 79.0%
Arrived 15+ minutes late 20.4%
Cancelled 0.4%
Diverted 0.3%

Every scheduled departure from PHX 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	PHX, 12 months to Jul 2026	All reported flights, May 2025
Departed on time	78.8%	74.3%	76.1%	76.7%
Arrived on time	79.0%	75.8%	77.4%	75.4%
Cancelled	0.4%	0.7%	0.9%	1.0%
Average departure delay (late minutes only)	13.7 min	17.6 min	15.8 min	17.5 min
Scheduled departures a day	574	558	542	20,188
Scheduled departures	17,223	16,741	197,642	605,648

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
WN Southwest Airlines	6,122	36%	75.0%	8.1 min	0.5%
AA American Airlines	4,860	28%	79.7%	5.7 min	0.2%
OO SkyWest Airlines	2,442	14%	84.9%	2.9 min	0.2%
DL Delta Air Lines	908	5%	87.0%	-1.2 min	0.1%
UA United Airlines	904	5%	76.3%	10.9 min	0.9%
MQ Envoy Air	779	5%	78.6%	5.1 min	0.1%
F9 Frontier Airlines	595	3%	76.6%	11.5 min	0.5%
AS Alaska Airlines	461	3%	83.5%	-0.7 min	0.2%
B6 JetBlue Airways	62	0%	82.3%	1.5 min	0.0%
G4 Allegiant Air	31	0%	83.9%	-1.7 min	0.0%
HA Hawaiian Airlines	31	0%	96.8%	-5.1 min	0.0%
NK Spirit Airlines	28	0%	82.1%	9.7 min	3.6%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
PHX–DEN	Phoenix to Denver	757	62.0%	21.3 min	0.7%
PHX–LAX	Phoenix to Los Angeles	669	85.1%	0.4 min	0.0%
PHX–SEA	Phoenix to Seattle	653	81.9%	1.2 min	0.5%
PHX–LAS	Phoenix to Las Vegas	589	78.8%	8.7 min	0.2%
PHX–ORD	Phoenix to Chicago	513	83.6%	1.2 min	0.0%
PHX–SLC	Phoenix to Salt Lake City	496	86.1%	1.7 min	0.0%
PHX–SAN	Phoenix to San Diego	468	76.9%	4.6 min	0.4%
PHX–SFO	Phoenix to San Francisco	458	76.2%	6.2 min	0.9%
PHX–DFW	Phoenix to Dallas/Fort Worth	456	77.0%	10.7 min	1.5%
PHX–SNA	Phoenix to Santa Ana	364	81.3%	6.3 min	0.0%
PHX–SMF	Phoenix to Sacramento	352	78.4%	4.9 min	0.6%
PHX–PDX	Phoenix to Portland	339	84.7%	2.9 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), May 2025.

Delay causes

BTS cause category	Share of delay minutes	National, May 2025	Minutes
Air carrier	38.7%	29.3%	79,916
Late-arriving aircraft	35.5%	37.8%	73,399
National Aviation System	24.0%	25.9%	49,577
Extreme weather	1.7%	6.9%	3,495
Security	0.2%	0.1%	355

206,742 delay minutes on 3,510 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 May 2025?

78.8% of 17,223 scheduled domestic departures left less than 15 minutes late, and 79.0% 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, 74.3% of 16,741 departures left on time and 0.7% were cancelled, against 78.8% and 0.4% 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 PHX · methodology · corrections.