No delays reported for AS 21 (JFK → SEA) as of 6:45 PM ET. It arrived on time 75.3% of the time in June-August 2026. When it was late, the average delay was 1h 0m. 2.2% of flights were cancelled. Right now there are no reported delays at JFK, SEA.
Looks on time
Next leg JFK → SEA, scheduled 7:00 AM local time. No delays at JFK right now.
Cancellation risk: Low 2.2% of its flights were cancelled in June-August 2026.
Estimate from the schedule, live position and airport conditions, if this flight operates today. Check Alaska Airlines for official times.
Before you fly
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Route and schedule
| Leg | Scheduled | On time |
|---|---|---|
| JFK → SEA New York, NY to Seattle, WA | 7:00 AM → 10:16 AM | 75% |
Local times. Schedules change; check your booking.
How reliable is AS 21?
| Arrived on time (within 15 min) | 75.3% |
| Average delay when late | 60 min |
| Cancelled | 2.2% |
| Diverted | 0% |
| Flights tracked | 91 |
Best and worst days to fly AS 21
AS 21 was most reliable on Fridays (100% on time) and least reliable on Mondays (57%).
| Monday | |
| Tuesday | |
| Wednesday | |
| Thursday | |
| Friday | |
| Saturday | |
| Sunday |
Why it runs late
| Late-arriving plane | |
| Airline (crew, maintenance) | |
| Air traffic system | |
| Extreme weather |
Share of delay minutes by cause, as reported by Alaska Airlines to the Department of Transportation.
Other flights JFK → SEA
All flights on this route, ranked
Live status at its airports
We show airport-wide airport status, not this flight's gate or live position. For that, check the Alaska Airlines app.
Alaska Airlines delays and what you're owed · Airline phone numbers
About this data
On-time history: U.S. Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, June-August 2026. Live conditions: live airport status. "On time" means arriving within 15 minutes of schedule.
Common questions
Is AS 21 delayed today?
Right now there are no reported delays at JFK, SEA. Checked 6:45 PM ET. For this flight's gate and exact status, check the Alaska Airlines app.
Is AS 21 usually on time?
AS 21 arrived within 15 minutes of schedule 75.3% of the time in June-August 2026, with an average delay of 60 minutes when late.
How often is AS 21 cancelled?
2.2% of AS 21 flights were cancelled in June-August 2026.