Ted Stevens Anchorage International in December 2025

72.2%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 December 2025, reporting carriers scheduled 1,316 domestic departures from Ted Stevens Anchorage International (ANC). 72.2% left less than 15 minutes late and 77.9% reached their destination on time; 2.6% were cancelled.

Nationally that month, 72.0% of flights departed on time and 71.9% arrived on time, so ANC departures were level with the national departure figure.

A year earlier, in December 2024, the airport had 1,164 departures with 84.8% leaving on time: a change of −12.6 points, with flights up 13%.

Flights arriving at ANC that month were on time 56.8% of the time (1,323 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 53%, air carrier 32% and extreme weather 10%.

On time 77.9%
Arrived 15+ minutes late 19.1%
Cancelled 2.6%
Diverted 0.5%

Every scheduled departure from ANC in December 2025, judged by arrival at the destination.

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

Measure	Dec 2025	Dec 2024	ANC, 12 months to Jul 2026	All reported flights, Dec 2025
Departed on time	72.2%	84.8%	82.7%	72.0%
Arrived on time	77.9%	82.7%	83.5%	71.9%
Cancelled	2.6%	0.7%	1.1%	1.5%
Average departure delay (late minutes only)	20.7 min	10.2 min	11.7 min	21.2 min
Scheduled departures a day	44	39	55	19,410
Scheduled departures	1,316	1,164	20,008	582,304

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
AS Alaska Airlines	1,048	80%	77.9%	1.7 min	2.7%
DL Delta Air Lines	193	15%	77.2%	10.7 min	2.6%
UA United Airlines	59	4%	79.7%	7.4 min	1.7%
AA American Airlines	16	1%	81.3%	10.5 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
ANC–SEA	Anchorage to Seattle	475	78.1%	3.9 min	1.1%
ANC–PDX	Anchorage to Portland	92	88.0%	-6.0 min	0.0%
ANC–JNU	Anchorage to Juneau	89	80.9%	-1.0 min	1.1%
ANC–FAI	Anchorage to Fairbanks	86	84.9%	3.3 min	2.3%
ANC–BET	Anchorage to Bethel	60	71.7%	4.4 min	8.3%
ANC–ADQ	Anchorage to Kodiak	59	71.2%	-4.3 min	15.3%
ANC–MSP	Anchorage to Minneapolis	59	86.4%	7.8 min	1.7%
ANC–HNL	Anchorage to Honolulu	52	67.3%	3.1 min	0.0%
ANC–DEN	Anchorage to Denver	44	77.3%	15.9 min	2.3%
ANC–SCC	Anchorage to Deadhorse	44	84.1%	-3.3 min	2.3%
ANC–CDV	Anchorage to Cordova	30	70.0%	14.9 min	0.0%
ANC–PHX	Anchorage to Phoenix	29	93.1%	-5.7 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), December 2025.

Delay causes

BTS cause category	Share of delay minutes	National, Dec 2025	Minutes
Air carrier	32.0%	33.3%	6,539
Late-arriving aircraft	52.5%	41.1%	10,729
National Aviation System	5.6%	19.1%	1,145
Extreme weather	9.5%	6.4%	1,940
Security	0.5%	0.2%	102

20,455 delay minutes on 251 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 ANC on time in December 2025?

72.2% of 1,316 scheduled domestic departures left less than 15 minutes late, and 77.9% reached their destination on time. The national figures that month were 72.0% and 71.9%.

How does that compare with a year earlier?

In December 2024, 84.8% of 1,164 departures left on time and 0.7% were cancelled, against 72.2% and 2.6% in December 2025.

Provenance

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