Historical on-time performance
Seattle to New York
2,421 miData through Dec 2025Source: US DOT · BTS
Flights on SEA–JFK arrive on time 68% of the time over the last 12 months.
On-time rate68%arrived within 15 min
p90 delay55 min1 in 10 flights is worse (tail risk)
Cancelled1.5%of scheduled flights
based on 2,859 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Delta Air LinesbestOn-time79%Medianon timep9030 minCancel0.9%Flights1,336
- Alaska AirlinesOn-time58%Median5 minp9065 minCancel2.0%Flights1,370
- JetBlue AirwaysOn-time63%Medianon timep9075 minCancel2.0%Flights153
Why flights run late
Delay causes
- Airline26%
- Weather4%
- Air traffic (NAS)47%
- Late aircraft22%
- Security1%
Most delay minutes here are attributed to Air traffic (NAS).
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 (2023-01 .. 2025-12).
Best time of day
Mornings are the most reliable time of day to fly this route — 78% on time.
- Mornings78% on time · p90 25 min · 2,267 flights
- Overnights76% on time · p90 35 min · 3,289 flights
- Middays67% on time · p90 70 min · 1,482 flights
- Afternoons65% on time · p90 70 min · 1,915 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 69% to 79% on time.
- Tuesdays79% on time · p90 35 min · 1,259 flights
- Wednesdays77% on time · p90 40 min · 1,258 flights
- Saturdays72% on time · p90 50 min · 1,248 flights
- Fridays71% on time · p90 45 min · 1,295 flights
- Thursdays70% on time · p90 40 min · 1,291 flights
- Mondays69% on time · p90 45 min · 1,297 flights
- Sundays69% on time · p90 55 min · 1,307 flights
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