Flight number record
AS 23
Alaska Airlines · New York to Seattle
- Route
- JFK → SEA
- Departs
- 11:30
- Flights
- 356
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s AS 23, check with Alaska Airlines.
AS 23 lands a B, about a point better than the national rate of 77.3%. Roughly one flight in five arrives 15 minutes late or worse, and those flights are late by about 55 minutes on average. That rests on 356 flights, with a median arrival 6 minutes early.
Key figures
On time
78.1%
Arrivals under 15 minutes late, of 347 completed flights
Avg delay
55 min
Across delayed arrivals only, not all flights
Cancelled
2.53%
National rate is 1.89%
1 hour+ late
4.6%
National rate is 8.3%
These figures cover 356 flights between September 2025 and August 2026. The median arrival is 6 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 23 flies
AS 23 flies JFK to SEA without a single fixed slot. Its most common scheduled departure was 11:30, used on 246 of 356 flights, with 13:00 (82 flights) next.
- Departs 11:30246 flights69.1%
- Departs 13:0082 flights23.0%
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 11:30 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.3%, and AS 23 runs level with that at 78.1%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
AS 23 next to JFK to SEA
Every carrier on JFK to SEA combined arrived on time 69.5% of the time across 2,906 flights, so AS 23 is 9 points ahead of it. Alaska flew 1,401 flights on the same city pair under all its flight numbers, including this one, and those ran 68.1% on time. Across its whole network Alaska Airlines managed 79.7%, which this flight trails by 2 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| AS 23thin sample | 356 | 78.1% | 55 min | 2.53% | B |
| All Alaska Airlines on JFK–SEA | 1,401 | 68.1% | 65 min | 3.35% | C− |
| All carriers on JFK–SEA | 2,906 | 69.5% | 65 min | 3.44% | C− |
| Alaska Airlines, whole network | 309,844 | 79.7% | 52 min | 1.20% | B |
Across the year
AS 23 quarter by quarter
AS 23 did not run the same all year. Its best quarter was Jul–Sep 2025 at 90.0% on time and its weakest Oct–Dec 2025 at 65.6%, a swing of 24 points on roughly 71 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 flights90.0%
- Oct–Dec 202592 flights65.6%
- Jan–Mar 202683 flights73.4%
- Apr–Jun 202689 flights87.5%
- Jul–Sep 202662 flights83.3%
Scale runs 55% to 95%.
By weekday, AS 23 did best on Wednesday at 87.0% on time and worst on Sunday at 72.0%. Each day rests on about 51 flights, so a gap of 15 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late AS 23 runs when it is late
AS 23 often beats the schedule: 124 of 347 completed flights, 36%, arrived 15 minutes or more early. The 76 late arrivals split 32 under half an hour, 28 between 30 and 60 minutes, and 16 an hour or more.
- 15+ min early124 flights35.7%
- Within 15 min147 flights42.4%
- 15–29 min late32 flights9.2%
- 30–59 min late28 flights8.1%
- 1–2 hours late9 flights2.6%
- 2+ hours late7 flights2.0%
Scale runs 0% to 100%.
Share of 347 completed flights by arrival against schedule.
11 of 48 late departures made up the time and arrived on time, 23% of them. In the other direction, 39 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 SEA.
The worst days
Worst days for AS 23
The latest arrival of the period was on 8 August 2026, 5 hours 49 minutes behind schedule; most of its delay minutes were filed as extreme weather. The five worst days are spread across August, January and July, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 8 August 2026 | 5 hours 49 minutes | Extreme weather |
| 20 January 2026 | 5 hours 27 minutes | Carrier |
| 16 January 2026 | 4 hours 1 minute | Carrier |
| 19 July 2026 | 3 hours 23 minutes | Late-arriving aircraft |
| 28 July 2026 | 3 hours 8 minutes | National Airspace System |
Delay causes
Why AS 23 runs late
National Airspace System accounts for 47% of the 4,153 delay minutes carriers reported here, and the remaining four split what is left.
- 47%National Airspace System
- 38%Carrier
- 9%Extreme weather
- 5%Late-arriving aircraft
- 1%Security
The largest share of delay minutes, 38%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,594 of the 4,153 delay minutes reported here. The split is drawn from 4,153 delay minutes reported on AS 23.
Cancellations run at 2.53%, against 1.89% nationally. That is about one flight in 40 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.
Connections and routes
What a delay on this flight costs
Badly late arrivals are rare here: only 4.6% 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 2,422 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.
Every one of the 356 flights under AS 23 in the data flew JFK to SEA. The number was not reused on any other city pair, which makes this a clean record of one route.
One caution: this is a thin sample. 356 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.
What to do with this
Booking AS 23
For a booking, the cancellation rate is the figure to plan around on AS 23: 2.53% of its 356 scheduled flights did not operate. A late arrival costs about 55 minutes, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- JFK to SEA, every carrier and departure
- SEA to JFK, the return direction
- Delta Air Lines 699 on the same route73.5%
- Delta Air Lines 740 on the same route68.6%
- Alaska Airlines 31 on the same route71.9%
- Delta Air Lines 688 on the same route64.4%
- Alaska Airlines 21 on the same route69.0%
- Alaska Airlines 17 on the same route50.4%
- John F. Kennedy International (JFK) delay statistics
- Seattle-Tacoma International (SEA) delay statistics
- Alaska Airlines on-time record
- Every Alaska Airlines flight number with a record
- The most and least reliable flight numbers in the US
- What a cancellation rate actually tells you (and what it hides)
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 ; recomputed monthly. How this data is collected.