FLIGHTLINE INTEL COMMERCIAL AVIATION INTELLIGENCE
Route T-100 Intelligence

BOS ↔ SEA

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

349,074
2026 passengers
2,225
2026 departures
84.7%
2026 market load factor

2026 airlines

CodeAirlinePassengersDeparturesLoad factor
ASAlaska Airlines Inc.165,5251,09385.6%
DLDelta Air Lines Inc.162,7801,00084.0%
B6JetBlue Airways20,76913283.0%

Annual history

YearPassengersPassengers/daySeatsDeparturesLoad factor
2015464,7961,273.4523,1273,18588.8%
2016554,5621,515.2621,5833,78189.2%
2017591,9331,621.7664,4994,10189.1%
2018675,3381,850.2780,7114,65386.5%
2019674,9711,849.2754,4994,57089.5%
2020215,143587.8483,7112,87544.5%
2021513,2211,406.1678,7134,01175.6%
2022731,0462,002.9858,8674,91385.1%
2023799,3802,190.1937,9465,21685.2%
2024803,2432,194.7917,7485,11887.5%
2025796,1112,181.1909,6514,93087.5%
2026349,0741,928.6412,3072,22584.7%
Source: U.S. Department of Transportation, Bureau of Transportation Statistics T-100 Segment data.