Ted Stevens Anchorage International in May 2025

88.9%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 1,692 domestic departures from Ted Stevens Anchorage International (ANC). 88.9% left less than 15 minutes late and 87.0% reached their destination on time; 0.7% were cancelled.

Nationally that month, 76.7% of flights departed on time and 75.4% arrived on time, so ANC departures were 12.2 points above the national departure figure.

A year earlier, in May 2024, the airport had 1,725 departures with 85.4% leaving on time: a change of +3.5 points, with flights down 2%.

Flights arriving at ANC that month were on time 79.2% of the time (1,694 scheduled arrivals).

Of the delay minutes that carriers assigned to a BTS cause category that month, air carrier 46%, late-arriving aircraft 40% and national aviation system 14%.

On time 87.0%
Arrived 15+ minutes late 12.2%
Cancelled 0.7%
Diverted 0.2%

Every scheduled departure from ANC 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	ANC, 12 months to Jul 2026	All reported flights, May 2025
Departed on time	88.9%	85.4%	82.7%	76.7%
Arrived on time	87.0%	87.1%	83.5%	75.4%
Cancelled	0.7%	0.5%	1.1%	1.0%
Average departure delay (late minutes only)	7.8 min	9.1 min	11.7 min	17.5 min
Scheduled departures a day	56	58	55	20,188
Scheduled departures	1,692	1,725	20,008	605,648

Airlines that month

Reporting carrier	Flights	Share	On time	Avg arrival delay	Cancelled
AS Alaska Airlines	1,265	75%	87.7%	-3.2 min	0.8%
DL Delta Air Lines	226	13%	88.1%	-6.8 min	0.0%
UA United Airlines	143	8%	87.4%	2.0 min	0.7%
AA American Airlines	58	3%	67.2%	31.3 min	0.0%

Busiest routes that month

Route	Cities	Flights	On time	Avg arrival delay	Cancelled
ANC–SEA	Anchorage to Seattle	663	88.4%	-4.8 min	0.8%
ANC–JNU	Anchorage to Juneau	110	91.8%	-3.7 min	0.0%
ANC–ORD	Anchorage to Chicago	109	88.1%	2.2 min	0.0%
ANC–ADQ	Anchorage to Kodiak	79	88.6%	-4.9 min	1.3%
ANC–PDX	Anchorage to Portland	64	93.8%	-6.7 min	0.0%
ANC–BET	Anchorage to Bethel	62	87.1%	0.9 min	0.0%
ANC–FAI	Anchorage to Fairbanks	62	98.4%	-6.7 min	0.0%
ANC–DEN	Anchorage to Denver	58	89.7%	4.1 min	0.0%
ANC–MSP	Anchorage to Minneapolis	58	86.2%	5.2 min	0.0%
ANC–SCC	Anchorage to Deadhorse	49	89.8%	-2.5 min	0.0%
ANC–LAX	Anchorage to Los Angeles	33	87.9%	-13.5 min	0.0%
ANC–BRW	Anchorage to Barrow	31	77.4%	9.3 min	3.2%

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	46.3%	29.3%	5,694
Late-arriving aircraft	39.5%	37.8%	4,850
National Aviation System	14.2%	25.9%	1,743
Extreme weather	0.1%	6.9%	7
Security	0.0%	0.1%	0

12,294 delay minutes on 206 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 May 2025?

88.9% of 1,692 scheduled domestic departures left less than 15 minutes late, and 87.0% 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, 85.4% of 1,725 departures left on time and 0.5% were cancelled, against 88.9% and 0.7% 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 ANC · methodology · corrections.