Flights London → Seattle
LHR → SEA
The London (LHR) → Seattle (SEA) route is operated by American Airlines, Air France, British Airways, Delta Air Lines, Iberia Airlines, KLM Royal Dutch Airlines. Across 14 flights monitored in recent months, 92% arrived on time (within 15 min of schedule), with an average delay of 4 minutes. The cancellation rate is 0.00%. FlightGuard's average computed risk is 11.8/100 (low), updated in real time from weather, ATC delays, strikes, NOTAMs, fuel and flight history. At Seattle the average ATFM delay is 2.0 minutes (main cause: atfm). Departing from London the average ATFM delay is 1.8 minutes.
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Airline punctuality on this route
| Airline | On-time | Average delay | Cancellations |
|---|---|---|---|
| Iberia Airlines (IB) | 86% | 17 min | 4.8% |
| KLM Royal Dutch Airlines (KL) | 84% | 20 min | 0.0% |
| Air France (AF) | 82% | 18 min | 3.3% |
| Delta Air Lines (DL) | 81% | 4 min | 2.5% |
| British Airways (BA) | 77% | 17 min | 2.4% |
| American Airlines (AA) | 76% | 9 min | 2.4% |
Airlines operating LHR-SEA
Airports
Frequently asked questions about LHR-SEA
On the London (LHR) -> Seattle (SEA) route, on-time performance is 92% with an average delay of 4 minutes, based on 14 tracked flights.
The cancellation rate on London-Seattle is 0.00% across 14 monitored flights.
The route is operated by 6 airlines: American Airlines, Air France, British Airways, Delta Air Lines, Iberia Airlines, KLM Royal Dutch Airlines.
Enter your flight number on FlightGuard for a real-time analysis based on 9 factors: weather at Seattle, ATC delays, strikes, NOTAMs, fuel, airline punctuality and recent trends.
The London-Seattle route is about 7,702 km: for a cancellation (with less than 14 days' notice), a delay over 3 hours, or denied boarding, UK261 compensation is £520, barring extraordinary circumstances.
