Seattle-Tacoma Airport Delays: SEA Passenger Rights Guide

Seattle airport delay compensation at Seattle-Tacoma International (SEA) follows the standard two-regulation framework. Alaska Airlines and Delta both operate hubs at SEA, so most departures are governed by US DOT 14 CFR Part 260. British Airways, Lufthansa, and a handful of Asian carriers serve SEA internationally; only the European carriers trigger EU Regulation 261/2004. SEA's geographic position creates distinctive weather patterns that compensation rules treat consistently with other US airports.

Alaska and Delta both fight for SEA volume. Alaska has the larger hub footprint, Delta has more long-haul international. Both compete on customer service metrics, which means refunds are typically processed without DOT escalation when you ask correctly.

SEA weather creates two distinct delay categories:

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  Marine layer fog (April-July, October-November): morning fog reduces visibility, requiring CAT III ILS approaches. Causes 30-90 minute departure holds. Routine; not extraordinary; refund applies if cancellation results.

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  Cascade Mountain weather: diversions to Portland (PDX) or Spokane (GEG) when SEA approaches are obscured. The original ticket refund right applies under US DOT.

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  Snow events: rare but operationally severe when they occur. SEA has limited snow equipment. Cash refund applies under DOT if you decline to fly.

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  Volcanic ash advisories: extraordinary under EU261 case law. Mount Rainier or Cascade range advisories can ground SEA briefly. Refund still applies under US DOT.

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  West Coast bank cascades: Alaska's morning bank (06:00-09:00) and evening bank (17:00-20:00) push hundreds of connections through SEA. Inbound delays propagate.

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  Alaska intra-state operations: SEA-ANC, SEA-FAI, SEA-JNU. Weather at the Alaska end can ground the SEA outbound. Refund right applies under DOT.

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  MAX 9 grounding precedent: 2024 MAX 9 grounding affected Alaska's SEA fleet. Aircraft availability is not extraordinary; refund applies.

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  IT outage history: occasional booking system disruptions cause check-in delays, sometimes leading to missed flights. Carrier operational risk; refund applies on declined rebookings.

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   Cancellation: any cause, any carrier. Cash refund to original payment method.

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   3+ hour domestic delay: refund right triggers when you decline the rebooking. Common on Alaska's intra-Alaska routes.

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   6+ hour international delay: triggers on Delta SEA-LHR, Delta SEA-CDG, Lufthansa SEA-FRA, etc.

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   Significant schedule change: passenger does not accept the change.

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   Class downgrade: refund of fare difference.

For broader DOT context, see DOT automatic refund rule: which airlines are actually complying and how to get a refund from your airline.

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  British Airways SEA-LHR: distance approximately 7,725 km. UK261, GBP 520 to GBP 600 per passenger on 3+ hour LHR delays.

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  Lufthansa SEA-FRA: 7,895 km. EU261, EUR 600 per passenger.

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  Iberia SEA-MAD: 8,275 km. EU261, EUR 600 per passenger.

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  Delta operating SEA-LHR or SEA-CDG: not EU261 (US carrier). US DOT cash refund only.

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  Korean Air, ANA, Emirates from SEA: not EU261. National rules apply; generally weaker.

Operating carrier identifies EU261 eligibility. A Delta-numbered ticket operated by Virgin Atlantic on SEA-LHR is a Virgin Atlantic flight for EU261 purposes (UK261 mirror).

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   Decline the rebooking: 'I decline this rebooking under 14 CFR Part 260 and request a cash refund to my original payment method.'

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   Document: boarding pass, FIDS arrival board, any carrier email or text about the disruption.

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   Submit refund: alaskaair.com/refund, delta.com/refund, ba.com/manage, etc. Save confirmation.

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   DOT complaint at 7 business days if no refund: transportation.gov/airconsumer.

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   EU261 portal filing within 30-90 days for European carriers; NEB escalation at 8 weeks if denied.

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  TravelStacks: $19 flat for US DOT refunds, 25% for EU261 cash. Family of 4 on a delayed Lufthansa SEA-FRA collects EUR 2,400 entitlement, net EUR 1,800 after fee.

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  AirHelp: 35% commission on EU261. Does not handle US DOT refund-only claims.

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  Compensair: 25% commission on EU261. EU focus only.

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  DIY DOT: free. Use Alaska or Delta refund portals; escalate to DOT at 7 business days.

See why a flat fee beats a percentage for most US flight claims for the math on US DOT pricing.

SEA delays are common in fog and Cascade weather seasons. The compensation framework is straightforward: decline rebookings explicitly for US DOT cash refund, file EU261 portal for European carriers. Use the delayed flight worth calculator to estimate. See the US DOT passenger rights pillar and EU261 passenger rights pillar for full context. Start a claim.