Alaska Airlines in December 2025

70.6%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 December 2025, Alaska Airlines (AS) reported 21,102 scheduled domestic flights. 70.6% arrived on time, 1.5% were cancelled and 0.5% diverted.

All reporting carriers together recorded 71.9% on time and 1.5% cancelled that month, so the carrier was 1.3 points below the combined figure.

A year earlier, in December 2024, it reported 20,027 flights with 77.5% on time: a change of −6.9 points.

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 41%, national aviation system 28% and air carrier 27%.

On time 70.6%
Arrived 15+ minutes late 27.5%
Cancelled 1.5%
Diverted 0.5%

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

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

Measure	Dec 2025	Dec 2024	AS, 12 months to Jul 2026	All carriers, Dec 2025
Arrived on time	70.6%	77.5%	78.5%	71.9%
Departed on time	72.8%	77.9%	79.0%	72.0%
Cancelled	1.5%	0.6%	1.2%	1.5%
Average arrival delay	7.9 min	4.0 min	2.9 min	13.0 min
Scheduled flights a day	703	668	826	19,410
Scheduled flights	21,102	20,027	301,435	582,304

85 airports and 348 routes had AS flights that month.

Busiest airports that month

Airport	Departures	On time	Avg arrival delay	Cancelled
SEA Seattle	6,123	70.2%	7.3 min	0.8%
PDX Portland	2,075	76.6%	4.3 min	0.6%
SAN San Diego	1,070	70.5%	8.1 min	1.8%
ANC Anchorage	1,048	77.9%	1.7 min	2.7%
SFO San Francisco	849	74.3%	8.3 min	0.8%
LAX Los Angeles	698	84.1%	-2.5 min	0.6%
LAS Las Vegas	495	73.1%	7.3 min	0.8%
PHX Phoenix	484	78.3%	1.9 min	0.4%
JFK New York	367	57.5%	24.7 min	2.2%
SNA Santa Ana	362	84.3%	-5.1 min	1.1%
JNU Juneau	327	60.9%	16.8 min	5.8%
EWR Newark	300	54.0%	20.5 min	2.0%
ORD Chicago	272	50.4%	27.7 min	4.0%
FAI Fairbanks	256	68.4%	8.7 min	1.2%
MCO Orlando	236	76.7%	6.0 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), December 2025.

Delay causes

BTS cause category	Share of delay minutes	All carriers, Dec 2025	Minutes
Air carrier	27.1%	33.3%	84,029
Late-arriving aircraft	40.8%	41.1%	126,436
National Aviation System	27.8%	19.1%	86,322
Extreme weather	3.9%	6.4%	11,989
Security	0.4%	0.2%	1,337

310,113 delay minutes on 5,802 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 December 2025?

70.6% of 21,102 scheduled domestic flights arrived less than 15 minutes late; all reporting carriers together recorded 71.9% that month.

How does that compare with a year earlier?

In December 2024 the carrier reported 20,027 flights with 77.5% on time and 0.6% cancelled, against 70.6% and 1.5% in December 2025.

Provenance

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