SEA (Seattle) to LAX (Los Angeles) flights arrive on time 84% of the time. The most reliable airline on this route is United Airlines at 92%. The average delay is 58 minutes. Delays on this route are most often caused by the airline (crew, maintenance, or boarding).
Source: Bureau of Transportation Statistics. Updated July 2026.SEA → LAX
SEA (Seattle) to LAX (Los Angeles)
SEA → LAX on-time performance by month
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This route is on time most of the time. About 84% of flights arrive on schedule.
Delays on this route are most often caused by the airline (crew, maintenance, or boarding).
Accurate?
United Airlines edges out Frontier Airlines on this route — 92% vs 81% on time.
Airline Comparison
United Airlines leads at 92% on time; Frontier Airlines trails at 81%.
Accurate?
Good to know
Departing from SEA
80% on timeExpect ~21 min sitting on the taxiway after your gate pushes back. SEA has long runway queues.
TSA is currently ~18 min. Best time: 4 AM (about 5 min).
Arriving at LAX
82% on timeWhen flights into LAX are late, the average delay is 70 minutes. Build buffer if you have ground plans.
If connecting at LAX: TSA is ~21 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 SEA? We'll brief you.
Delays, TSA, weather, gates — we'll let you know if something matters.
Know someone flying soon?
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Data last updated July 2026. Source: Bureau of Transportation Statistics.