Alaska Airlines in September 2025

82.9%arrived 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, Alaska Airlines (AS) reported 20,747 scheduled domestic flights. 82.9% arrived on time, 0.6% were cancelled and 0.2% diverted.

All reporting carriers together recorded 82.8% on time and 0.5% cancelled that month, so the carrier was level with the combined figure.

A year earlier, in September 2024, it reported 21,548 flights with 79.1% on time: a change of +3.8 points.

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 36%, air carrier 30% and national aviation system 30%.

On time 82.9%
Arrived 15+ minutes late 16.2%
Cancelled 0.6%
Diverted 0.2%

Every scheduled domestic flight reported by Alaska Airlines in September 2025.

September 2025 against a year earlier, the carrier's year and all carriers

Measure	Sep 2025	Sep 2024	AS, 12 months to Jul 2026	All carriers, Sep 2025
Arrived on time	82.9%	79.1%	78.5%	82.8%
Departed on time	84.0%	82.6%	79.0%	83.1%
Cancelled	0.6%	0.6%	1.2%	0.5%
Average arrival delay	-1.0 min	2.9 min	2.9 min	2.3 min
Scheduled flights a day	692	718	826	18,748
Scheduled flights	20,747	21,548	301,435	562,439

85 airports and 320 routes had AS flights that month.

Busiest airports that month

Airport	Departures	On time	Avg arrival delay	Cancelled
SEA Seattle	6,559	81.1%	0.3 min	0.4%
PDX Portland	1,702	84.8%	-0.6 min	0.1%
ANC Anchorage	1,264	89.1%	-5.8 min	0.5%
SAN San Diego	970	80.5%	0.8 min	2.0%
SFO San Francisco	814	80.8%	-2.1 min	0.7%
LAX Los Angeles	612	92.6%	-9.9 min	0.3%
LAS Las Vegas	441	75.7%	4.1 min	0.5%
JNU Juneau	420	83.1%	-1.7 min	1.9%
PHX Phoenix	398	85.9%	0.8 min	0.3%
SNA Santa Ana	361	92.2%	-8.3 min	0.6%
JFK New York	300	77.0%	2.9 min	2.0%
EWR Newark	292	79.1%	2.4 min	1.0%
BOS Boston	245	78.0%	5.0 min	0.4%
ORD Chicago	243	79.8%	2.8 min	0.8%
GEG Spokane	237	84.0%	-2.4 min	0.4%

By scheduled departure hour

On-time share:under 62%6270768288% and over

Share of AS flights that arrived on time, by scheduled departure hour (local time at each origin), September 2025.

Delay causes

BTS cause category	Share of delay minutes	All carriers, Sep 2025	Minutes
Air carrier	30.3%	34.3%	49,301
Late-arriving aircraft	35.6%	37.4%	57,884
National Aviation System	29.7%	22.6%	48,281
Extreme weather	3.6%	5.6%	5,796
Security	0.8%	0.1%	1,338

162,600 delay minutes on 3,369 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

What share of Alaska Airlines flights were on time in September 2025?

82.9% of 20,747 scheduled domestic flights arrived less than 15 minutes late; all reporting carriers together recorded 82.8% that month.

How does that compare with a year earlier?

In September 2024 the carrier reported 21,548 flights with 79.1% on time and 0.6% cancelled, against 82.9% and 0.6% in September 2025.

Provenance

Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for September 2025; public domain. Domestic scheduled flights, totals and averages only. The site's data runs through July 2026. Full record for Alaska Airlines · methodology · corrections.