Historical on-time performance
Newark to Seattle
Flights on EWR–SEA arrive on time 71% of the time over the last 12 months.
based on 2,179 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- United AirlinesbestOn-time76%Medianon timep9050 minCancel1.0%Flights972
- Alaska AirlinesOn-time67%Medianon timep9055 minCancel2.9%Flights1,207
Why flights run late
Delay causes
- Airline18%
- Weather8%
- Air traffic (NAS)38%
- Late aircraft35%
- Security1%
Most delay minutes here are attributed to Air traffic (NAS).
When flights don't go
Why flights were cancelled
- Airline24%
- Weather60%
- Air traffic (NAS)16%
- Security0%
Most cancellations here are attributed to Weather. Shares are among 45 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 EWR → SEA
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 58% to 81% on time.
- Middays81% on time · p90 35 min · 236 flights
- Mornings81% on time · p90 30 min · 2,047 flights
- Afternoons76% on time · p90 55 min · 1,454 flights
- Evenings63% on time · p90 75 min · 2,224 flights
- Overnights58% on time · p90 80 min · 175 flights · limited
Best day of week
On-time rates are fairly even by day on this route — ranging from 69% to 78% on time.
- Tuesdays78% on time · p90 35 min · 864 flights
- Wednesdays75% on time · p90 50 min · 863 flights
- Mondays72% on time · p90 60 min · 894 flights
- Thursdays71% on time · p90 55 min · 893 flights
- Sundays71% on time · p90 60 min · 902 flights
- Saturdays70% on time · p90 65 min · 819 flights
- Fridays69% on time · p90 70 min · 901 flights
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