FLIGHTLINE INTEL COMMERCIAL AVIATION INTELLIGENCE
Route T-100 Intelligence

LHR ↔ SEA

Two-way market traffic, capacity, airline participation and annual performance.

262,505
2026 passengers
1,319
2026 departures
77.6%
2026 market load factor

2026 airlines

CodeAirlinePassengersDeparturesLoad factor
BABritish Airways Plc129,59360386.1%
DLDelta Air Lines Inc.65,96035972.7%
VSVirgin Atlantic Airways50,38727669.3%
ASAlaska Airlines Inc.16,5658168.2%

Annual history

YearPassengersPassengers/daySeatsDeparturesLoad factor
2015340,364932.5433,8281,78978.5%
2016359,067981.1460,5811,83978.0%
2017374,9911,027.4459,7281,81181.6%
2018388,0581,063.2468,4021,87682.8%
2019417,6491,144.2495,1761,98684.3%
202073,753201.5134,27455654.9%
202176,397209.3249,9981,06330.6%
2022356,847977.7503,2832,06570.9%
2023580,6381,590.8800,2713,07872.6%
2024524,3991,432.8642,2022,48781.7%
2025531,5701,456.4654,7362,52681.2%
2026262,5051,450.3338,3211,31977.6%
Source: U.S. Department of Transportation, Bureau of Transportation Statistics T-100 Segment data.