Historical on-time performance
Seattle to New York
2,422 miData through May 2026Source: US DOT · BTS
Flights on SEA–JFK arrive on time 70% of the time over the last 12 months.
On-time rate70%arrived within 15 min
p90 delay50 min1 in 10 flights is worse (tail risk)
Cancelled2.5%of scheduled flights
based on 2,862 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Delta Air LinesbestOn-time77%Medianon timep9035 minCancel2.3%Flights1,337
- Alaska AirlinesOn-time65%Medianon timep9055 minCancel2.6%Flights1,403
- JetBlue AirwaysOn-time60%Medianon timep9085 minCancel2.5%Flights122
Why flights run late
Delay causes
- Airline32%
- Weather5%
- Air traffic (NAS)40%
- Late aircraft23%
- Security1%
Most delay minutes here are attributed to Air traffic (NAS).
When flights don't go
Why flights were cancelled
- Airline34%
- Weather55%
- Air traffic (NAS)11%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 71 cancellations with a reported cause (BTS reports causes from June 2003).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly SEA → JFK
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Mornings are the most reliable time of day to fly this route — 79% on time.
- Mornings79% on time · p90 25 min · 2,284 flights
- Overnights75% on time · p90 35 min · 3,031 flights
- Middays68% on time · p90 65 min · 1,682 flights
- Afternoons65% on time · p90 70 min · 1,846 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 68% to 78% on time.
- Tuesdays78% on time · p90 35 min · 1,240 flights
- Wednesdays76% on time · p90 40 min · 1,245 flights
- Saturdays73% on time · p90 45 min · 1,242 flights
- Thursdays71% on time · p90 40 min · 1,275 flights
- Fridays71% on time · p90 50 min · 1,285 flights
- Mondays70% on time · p90 45 min · 1,274 flights
- Sundays68% on time · p90 55 min · 1,284 flights
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