Historical on-time performance
New York to Seattle
2,422 miData through May 2026Source: US DOT · BTS
Flights on JFK–SEA arrive on time 65% of the time over the last 12 months.
On-time rate65%arrived within 15 min
p90 delay50 min1 in 10 flights is worse (tail risk)
Cancelled2.7%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-time70%Medianon timep9040 minCancel2.2%Flights1,338
- JetBlue AirwaysOn-time62%Medianon timep9090 minCancel0.8%Flights122
- Alaska AirlinesOn-time61%Medianon timep9055 minCancel3.2%Flights1,402
Why flights run late
Delay causes
- Airline25%
- Weather6%
- Air traffic (NAS)46%
- Late aircraft22%
- Security1%
Most delay minutes here are attributed to Air traffic (NAS).
When flights don't go
Why flights were cancelled
- Airline32%
- Weather57%
- Air traffic (NAS)12%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 76 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 JFK → SEA
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
Middays are the most reliable time of day to fly this route — 84% on time.
- Middays84% on time · p90 20 min · 1,816 flights
- Mornings81% on time · p90 25 min · 2,666 flights
- Afternoons73% on time · p90 45 min · 2,058 flights
- Evenings63% on time · p90 70 min · 2,261 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 73% to 79% on time.
- Tuesdays79% on time · p90 35 min · 1,242 flights
- Wednesdays78% on time · p90 35 min · 1,241 flights
- Mondays75% on time · p90 45 min · 1,276 flights
- Saturdays75% on time · p90 45 min · 1,245 flights
- Thursdays74% on time · p90 40 min · 1,271 flights
- Fridays74% on time · p90 40 min · 1,284 flights
- Sundays73% on time · p90 45 min · 1,286 flights
Keep exploring