FLIGHTLINE INTEL COMMERCIAL AVIATION INTELLIGENCE
Route T-100 Intelligence

BOI ↔ SEA

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

359,344
2026 passengers
5,159
2026 departures
74.2%
2026 market load factor

2026 airlines

CodeAirlinePassengersDeparturesLoad factor
OOSkyWest Airlines Inc.164,2832,95275.2%
ASAlaska Airlines Inc.117,5291,04366.6%
QXHorizon Air76,6081,15887.0%
DLDelta Air Lines Inc.779584.5%
AAAmerican Airlines Inc.145176.3%

Annual history

YearPassengersPassengers/daySeatsDeparturesLoad factor
2015462,6891,267.6607,5418,28176.2%
2016514,5291,405.8668,3039,16177.0%
2017552,4681,513.6690,3698,91280.0%
2018606,7701,662.4816,4319,36174.3%
2019736,8672,018.8953,04211,02777.3%
2020345,872945.0755,2789,19745.8%
2021593,5401,626.1993,92710,68459.7%
2022687,7231,884.2912,38110,36875.4%
2023742,9352,035.4949,62211,21578.2%
2024747,6972,042.9937,26411,19779.8%
2025750,4862,056.1967,70111,13077.6%
2026359,3441,985.3484,1725,15974.2%
Source: U.S. Department of Transportation, Bureau of Transportation Statistics T-100 Segment data.