EWR (Newark) to SEA (Seattle) flights arrive on time 74% of the time. The most reliable airline on this route is United Airlines at 77%. The average delay is 68 minutes. Delays on this route are most often caused by the incoming plane arriving late.
Source: Bureau of Transportation Statistics. Updated August 2026.EWR → SEA
EWR (Newark) to SEA (Seattle)
EWR → SEA on-time performance by month
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This route is delayed fairly often. About 74% of flights arrive on schedule.
Delays on this route are most often caused by the incoming plane arriving late.
Accurate?
United Airlines edges out Alaska Airlines on this route — 77% vs 71% on time.
Airline Comparison
United Airlines leads at 77% on time; Alaska Airlines trails at 71%.
Accurate?
Good to know
Departing from EWR
77% on timeExpect ~23 min sitting on the taxiway after your gate pushes back. EWR has long runway queues.
TSA is currently ~5 min. Best time: 4 AM (about 5 min).
EWR cancels 2.8% of flights — higher than average. Have a backup plan.
Arriving at SEA
80% on timeWhen flights into SEA are late, the average delay is 57 minutes. Build buffer if you have ground plans.
If connecting at SEA: TSA is ~5 min right now. Allow at least 60 minutes for a domestic connection.
Flight cancelled or delayed?
Check what United Airlines owes you — refund rights, action plan, complaint email. Free.
Flying out of EWR? We'll brief you.
Delays, TSA, weather, gates — we'll let you know if something matters.
Know someone flying soon?
Send them the link — delay data, TSA waits, weather, all free.
Data last updated August 2026. Source: Bureau of Transportation Statistics.