SEA (Seattle) to JFK (New York) flights arrive on time 75% of the time. The most reliable airline on this route is Delta Air Lines at 83%. The average delay is 58 minutes. Delays on this route are most often caused by air traffic and busy airspace.
Source: Bureau of Transportation Statistics. Updated May 2026.SEA → JFK
SEA (Seattle) to JFK (New York)
SEA → JFK on-time performance by month
24
25
JanFebMarAprMayJunJulAugSepOctNovDec
Worse
Better
This route is delayed fairly often. About 75% of flights arrive on schedule.
Delays on this route are most often caused by air traffic and busy airspace.
Accurate?
Delta Air Lines is significantly more reliable on this route at 83% on time vs Alaska Airlines at 68%.
Airline Comparison
Delta Air Lines leads at 83% on time; Alaska Airlines trails at 68%.
Accurate?
Good to know
Departing from SEA
82% on timeExpect ~19 min sitting on the taxiway after your gate pushes back. SEA has long runway queues.
TSA is currently ~15 min. Best time: 4 AM (about 5 min).
Arriving at JFK
78% on timeWhen flights into JFK are late, the average delay is 78 minutes. Build buffer if you have ground plans.
If connecting at JFK: TSA is ~26 min right now. Allow at least 60 minutes for a domestic connection.
JFK has a 2.3% cancellation rate — keep the airline app handy for rebooking.
Flight cancelled or delayed?
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Data last updated May 2026. Source: Bureau of Transportation Statistics.