Partly stale · checked FAA NAS status 223 h staleForecast cycle 88 minLightning 223 h staleWeather observations no data staleFAA surface data 1 minFAA flight data 1 min

FAA NAS status is stale (223 h old). No FAA restriction can start or end on the wire until it is fresh again.

Lightning is stale (223 h old). Lightning items are paused; thunderstorm items still come from official observations.

Weather observations is stale. Weather items are paused until it is fresh again; missing observations never end a weather event.

Observed Significant Developing Delay SEA arrivals

Seattle arrival delays ease: 48% late in the last hour, still above normal

Current state
Developing
Started
Latest activity
Updates
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Tailodds reports what the FAA publishes, what we measure and what our model forecasts. It doesn’t control airport operations or change bookings; check with your airline about your trip.

Updates oldest first

  1. Initial Observed

    Seattle arrivals running late: 55% reached the gate 15+ min late in the last hour

    Of 29 arrivals that landed between 2:26 PM and 3:26 PM PST, 16 reached the gate at least 15 minutes late. Typically 19% of arrivals at Seattle arrive that late (US DOT on-time data, last 12 published months, all arrivals). Measured by Tailodds from FAA flight data against airline schedules.

    Evidence for this update
    Measurement window2:26 PM–3:26 PM PST
    Sample29 flights, 16 late (55%)
    Comparison19% typical · US DOT on-time data, last 12 published months, all arrivals
    Median delay16.0 min
    MethodFAA wheels-off/on +/- median taxi (taxi_times) vs the FAA-filed airline schedule (flight_odds)
    Source event time
    Ingested
    Published here (2026-11-12 23:26 UTC)
    SourcesTailodds measurement of FAA flight data against airline schedules
    Provenanceobserved_ops observed-ops-v1 · config 2026-10-17.1 · writer template-v1
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  2. Escalation Observed

    Seattle arrival delays worsen: 61% late in the last hour

    What changed: late share 55% → 61%

    Of 28 arrivals that landed between 2:55 PM and 3:55 PM PST, 17 reached the gate at least 15 minutes late. Typically 19% of arrivals at Seattle arrive that late (US DOT on-time data, last 12 published months, all arrivals). Measured by Tailodds from FAA flight data against airline schedules.

    Evidence for this update
    Measurement window2:55 PM–3:55 PM PST
    Sample28 flights, 17 late (61%)
    Comparison19% typical · US DOT on-time data, last 12 published months, all arrivals
    Median delay24.0 min
    MethodFAA wheels-off/on +/- median taxi (taxi_times) vs the FAA-filed airline schedule (flight_odds)
    Source event time
    Ingested
    Published here (2026-11-12 23:55 UTC)
    SourcesTailodds measurement of FAA flight data against airline schedules
    Provenanceobserved_ops observed-ops-v1 · config 2026-10-17.1 · writer template-v1
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  3. De-escalation Observed

    Seattle arrival delays ease: 52% late in the last hour, still above normal

    What changed: late share 61% → 52%

    Of 27 arrivals that landed between 3:16 PM and 4:16 PM PST, 14 reached the gate at least 15 minutes late. Typically 19% of arrivals at Seattle arrive that late (US DOT on-time data, last 12 published months, all arrivals). Measured by Tailodds from FAA flight data against airline schedules.

    Evidence for this update
    Measurement window3:16 PM–4:16 PM PST
    Sample27 flights, 14 late (52%)
    Comparison19% typical · US DOT on-time data, last 12 published months, all arrivals
    Median delay15.0 min
    MethodFAA wheels-off/on +/- median taxi (taxi_times) vs the FAA-filed airline schedule (flight_odds)
    Source event time
    Ingested
    Published here (2026-11-13 00:16 UTC)
    SourcesTailodds measurement of FAA flight data against airline schedules
    Provenanceobserved_ops observed-ops-v1 · config 2026-10-17.1 · writer template-v1
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  4. Escalation Observed

    Seattle arrival delays worsen: 68% late in the last hour

    What changed: late share 52% → 68%

    Of 34 arrivals that landed between 7:02 PM and 8:02 PM PST, 23 reached the gate at least 15 minutes late. Typically 19% of arrivals at Seattle arrive that late (US DOT on-time data, last 12 published months, all arrivals). Measured by Tailodds from FAA flight data against airline schedules.

    Evidence for this update
    Measurement window7:02 PM–8:02 PM PST
    Sample34 flights, 23 late (68%)
    Comparison19% typical · US DOT on-time data, last 12 published months, all arrivals
    Median delay26.0 min
    MethodFAA wheels-off/on +/- median taxi (taxi_times) vs the FAA-filed airline schedule (flight_odds)
    Source event time
    Ingested
    Published here (2026-11-13 04:02 UTC)
    SourcesTailodds measurement of FAA flight data against airline schedules
    Provenanceobserved_ops observed-ops-v1 · config 2026-10-17.1 · writer template-v1
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  5. De-escalation Observed

    Seattle arrival delays ease: 53% late in the last hour, still above normal

    What changed: late share 68% → 53%

    Of 36 arrivals that landed between 7:23 PM and 8:23 PM PST, 19 reached the gate at least 15 minutes late. Typically 19% of arrivals at Seattle arrive that late (US DOT on-time data, last 12 published months, all arrivals). Measured by Tailodds from FAA flight data against airline schedules.

    Evidence for this update
    Measurement window7:23 PM–8:23 PM PST
    Sample36 flights, 19 late (53%)
    Comparison19% typical · US DOT on-time data, last 12 published months, all arrivals
    Median delay20.0 min
    MethodFAA wheels-off/on +/- median taxi (taxi_times) vs the FAA-filed airline schedule (flight_odds)
    Source event time
    Ingested
    Published here (2026-11-13 04:23 UTC)
    SourcesTailodds measurement of FAA flight data against airline schedules
    Provenanceobserved_ops observed-ops-v1 · config 2026-10-17.1 · writer template-v1
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  6. Escalation Observed

    Seattle arrival delays worsen: 66% late in the last hour

    What changed: late share 53% → 66%

    Of 35 arrivals that landed between 8:44 PM and 9:44 PM PST, 23 reached the gate at least 15 minutes late. Typically 19% of arrivals at Seattle arrive that late (US DOT on-time data, last 12 published months, all arrivals). Measured by Tailodds from FAA flight data against airline schedules.

    Evidence for this update
    Measurement window8:44 PM–9:44 PM PST
    Sample35 flights, 23 late (66%)
    Comparison19% typical · US DOT on-time data, last 12 published months, all arrivals
    Median delay24.0 min
    MethodFAA wheels-off/on +/- median taxi (taxi_times) vs the FAA-filed airline schedule (flight_odds)
    Source event time
    Ingested
    Published here (2026-11-13 05:44 UTC)
    SourcesTailodds measurement of FAA flight data against airline schedules
    Provenanceobserved_ops observed-ops-v1 · config 2026-10-17.1 · writer template-v1
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  7. De-escalation Observed

    Seattle arrival delays ease: 48% late in the last hour, still above normal

    What changed: late share 66% → 48%

    Of 27 arrivals that landed between 10:20 PM and 11:20 PM PST, 13 reached the gate at least 15 minutes late. Typically 19% of arrivals at Seattle arrive that late (US DOT on-time data, last 12 published months, all arrivals). Measured by Tailodds from FAA flight data against airline schedules.

    Evidence for this update
    Measurement window10:20 PM–11:20 PM PST
    Sample27 flights, 13 late (48%)
    Comparison19% typical · US DOT on-time data, last 12 published months, all arrivals
    Median delay13.0 min
    MethodFAA wheels-off/on +/- median taxi (taxi_times) vs the FAA-filed airline schedule (flight_odds)
    Source event time
    Ingested
    Published here (2026-11-13 07:20 UTC)
    SourcesTailodds measurement of FAA flight data against airline schedules
    Provenanceobserved_ops observed-ops-v1 · config 2026-10-17.1 · writer template-v1
    Was this useful?