AS21Alaska Airlines · JFK → SEA
live · 5m ago
Route confirmed Alaska Airlines

AS21 New YorkJFK · 07:00 SeattleSEA · 10:23

AS21 by Alaska Airlines flies from New York (JFK) to Seattle (SEA) for the Thu, Nov 5 departure.

Right nowOn Time · gate 32
07:00

departs JFK · on schedule

Typical gate push−4 minmedian posted departure

Where the minutes go

last 7 operations · gate push → arrival
0+30+60+90 min
11-04
−8 gate
11-03
+15 gate
11-02
+4 gate
11-01
−4 gate
10-31
+0 gate
10-30
−8 gate
10-29
−8 gate

The bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.

The last 30 days

arrival outcome per operation

0 cancelled · 7 operations tracked

The route today

live boards
JFKNew YorkOn-time likelyJFK delay board →
SEASeattleHigh riskSEA delay board →
JFK→SEAevery carrier, schedules and on-time historyRoute intelligence →

Weather lens

Weather-conditioned outlook for this flight right now

Early read, sample still building
47%Chance of 15+ min delay
16%Chance of cancellation
+45 minTypical airport delay in this weather

Driven mainly by JFK (New York), currently flying LIFR (low instrument). These figures come from both airports' records under conditions like today's, over the last 90 days. This route has few tracked flights so far, so treat this as an early read.

Pro Flight Search tracking, 90 days · the weather × delay correlation study → · live weather risk by airport →

Tomorrow at New York

Forecast

Fri 6 Nov, local date

High20°Clikely 18°C to 22°C
Low15°Clikely 12°C to 17°C
  • 26% chance of fog
  • 92% chance of rain

Forecast: GateWeather · incl. data from ECMWF (CC BY 4.0, modified) · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.

Tomorrow at Seattle

Forecast

Thu 5 Nov, local date

High14°Clikely 12°C to 15°C
Low9°Clikely 7°C to 10°C
  • 72% chance of rain

Forecast: GateWeather · incl. data from ECMWF (CC BY 4.0, modified) · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.

When it flies

scheduled departures
061422
M
T
W
T
F
S
S

Each mark is a scheduled departure at its origin-local time. Today is highlighted.

Other New York to Seattle flights today

same route · Alaska Airlines
AS23departs 13:00
AS31departs 16:36
AS17departs 20:25

If AS21 is cancelled, these are the other Alaska Airlines nonstop flights from New York to Seattle on the same day, with scheduled departure times in JFK local time. Most flights that show a delay still operate. Rebooking usually helps only when that delay is very large. Every airline on this route →

How AS21 actually runs

Pro Flight Search has tracked every published board update for AS21 across the JFK and SEA boards: schedule changes, gate pushes and actual clocks. Usually departs on time. Based on 7 confirmed departures · 7/7 within 15 min of schedule.

The verdict above is that record speaking, so it reflects how AS21 operates rather than what the timetable promises. Numbers refresh as new flights operate.

Technical record

How this operation is measured

board clocksaircraft

Board log

scheduled → actual, per operation
11-04JFK 07:00 06:52 (−8)SEA 10:23
11-03JFK 07:00 07:15 (+15)SEA 10:23
11-02JFK 07:00 07:04 (+4)SEA 10:23
11-01JFK 07:00 06:56 (−4)SEA 10:23
10-31JFK 07:22 (+0)SEA 10:35
10-30JFK 07:22 07:14 (−8)SEA 10:35
10-29JFK 07:22 07:14 (−8)SEA 10:35

Aircraft

Recent tails: N278AK.

Board clocks recorded as JFK and SEA published them.

Planning around AS21? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure

Cite this data

Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.

Suggested citation

Pro Flight Search: AS21 New York to Seattle on-time performance, measured from the JFK and SEA airport boards.

Canonical URL
https://proflightsearch.com/flight/AS21
How we measure this →