Flight number record

AS 572

Alaska Airlines · Seattle to Raleigh

Route: SEA → RDU
Departs: 08:20
Flights: 343
Period: September 2025 to August 2026

Historical statistics for September 2025 to August 2026, not live status. For today’s AS 572, check with Alaska Airlines.

AS 572 earns a B+. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 7 points better than the national rate of 77.3%. When something does go wrong the average delay runs about 40 minutes. That rests on 343 flights, with a median arrival 7 minutes early.

Set against the rest of the country, AS 572's record is 7 points better than the US average of 77.3%. That gap is worth roughly 74 fewer late arrivals for every thousand flights.

On time

84.7%

Arrivals under 15 minutes late, of 339 completed flights

Avg delay

40 min

Across delayed arrivals only, not all flights

Cancelled

0.58%

National rate is 1.89%

1 hour+ late

2.7%

National rate is 8.3%

These figures cover 343 flights between September 2025 and August 2026. The median arrival is 7 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.

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Schedule

When AS 572 flies

AS 572 flies SEA to RDU without a single fixed slot. Its most common scheduled departure was 08:20, used on 92 of 343 flights, with 09:10 (42 flights) and 10:00 (36 flights) next.

Departs 08:2092 flights26.8%
Departs 09:1042 flights12.2%
Departs 10:0036 flights10.5%

Scale runs 0% to 100%.

Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.

A 08:20 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and AS 572 runs level with that at 84.7%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

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Against the route

AS 572 next to SEA to RDU

Every carrier on SEA to RDU combined arrived on time 81.4% of the time across 918 flights, so AS 572 is 3 points ahead of it. Alaska flew 554 flights on the same city pair under all its flight numbers, including this one, and those ran 84.5% on time. Across its whole network Alaska Airlines managed 79.7%, which this flight beats by 5 points.

AS 572 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
AS 572thin sample	343	84.7%	40 min	0.58%	B+
All Alaska Airlines on SEA–RDU	554	84.5%	38 min	0.36%	B+
All carriers on SEA–RDU	918	81.4%	44 min	0.76%	B+
Alaska Airlines, whole network	309,844	79.7%	52 min	1.20%	B

Across the year

AS 572 quarter by quarter

AS 572 did not run the same all year. Its best quarter was Jan–Mar 2026 at 90.9% on time and its weakest Jul–Sep 2025 at 76.7%, a swing of 14 points on roughly 69 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.

Jul–Sep 202530 flights76.7%
Oct–Dec 202591 flights86.8%
Jan–Mar 202690 flights90.9%
Apr–Jun 202670 flights82.9%
Jul–Sep 202662 flights78.3%

Scale runs 70% to 95%.

By weekday, AS 572 did best on Sunday at 91.5% on time and worst on Thursday at 79.2%. Each day rests on about 49 flights, so a gap of 12 points is worth noticing but could still narrow in another year.

Arrival by arrival

How late AS 572 runs when it is late

AS 572 often beats the schedule: 114 of 339 completed flights, 34%, arrived 15 minutes or more early. Most of the lateness is short. 29 of the 52 late arrivals were under half an hour behind, and 9 reached an hour or more.

15+ min early114 flights33.6%
Within 15 min173 flights51.0%
15–29 min late29 flights8.6%
30–59 min late14 flights4.1%
1–2 hours late7 flights2.1%
2+ hours late2 flights0.6%

Scale runs 0% to 100%.

Share of 339 completed flights by arrival against schedule.

A late pushback is often recovered here: of 66 departures that left 15 minutes late or more, 32 still arrived on time. In the other direction, 18 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at RDU.

The worst days

Worst days for AS 572

The latest arrival of the period was on 10 December 2025, 3 hours 25 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on three of the five worst days.

The latest arrivals of AS 572 in the period
Date	Arrived late by	Largest filed cause
10 December 2025	3 hours 25 minutes	Late-arriving aircraft
13 March 2026	2 hours 53 minutes	Extreme weather
1 August 2026	1 hour 26 minutes	Late-arriving aircraft
18 May 2026	1 hour 23 minutes	Carrier
23 June 2026	1 hour 22 minutes	Late-arriving aircraft

Delay causes

Why AS 572 runs late

Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 2,078 reported delay minutes.

Carrier
37%
National Airspace System
32%
Late-arriving aircraft
26%
Extreme weather
5%

32% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 669 minutes out of 2,078, against a national NAS share of 21%. The split is drawn from 2,078 delay minutes reported on AS 572.

Cancellations are rare at 0.58%, below the national 1.89% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 2.7% land an hour or more behind schedule, against 8.3% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.

At 2,354 miles this is transcontinental flying, and long routes get a quiet structural advantage. Scheduled block time on a flight this length carries more padding in absolute minutes, so a twenty-minute late departure often still becomes an on-time arrival. Read the on-time rate here as slightly flattering next to a short-haul route with the same operational quality.

AS 572 is not only a SEA to RDU flight. It also flew RDU to SEA (321 flights, 72.0% on time) often enough to be scored on its own. Airlines attach one number to several legs of an aircraft's day, and each leg keeps its own record here, so check which city pair is on your booking before reading a rate.

One caution: this is a thin sample. 343 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.

Other routes flown as AS 572
Also flown as	Flights	On time	Avg delay	Cancelled	Grade
RDU to SEAthin sample	321	72.0%	49 min	1.87%	C

What to do with this

Booking AS 572

For a booking, read AS 572 as 84.7% on time with 0.58% cancelled over 343 flights. Those are rates from the past twelve months, not a forecast for any particular day.

Where to go next

A flight number here means Alaska Airlines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.

Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures