FLIGHTLINE INTEL COMMERCIAL AVIATION INTELLIGENCE
Route T-100 Intelligence

ONT ↔ SEA

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

237,322
2026 passengers
2,321
2026 departures
79.7%
2026 market load factor

2026 airlines

CodeAirlinePassengersDeparturesLoad factor
ASAlaska Airlines Inc.160,7001,16180.4%
OOSkyWest Airlines Inc.64,5761,06182.5%
F9Frontier Airlines Inc.11,9118560.8%
DLDelta Air Lines Inc.135184.4%
8CAir Transport International013

Annual history

YearPassengersPassengers/daySeatsDeparturesLoad factor
2015223,258611.7258,3412,12986.4%
2016259,329708.5295,4892,05787.8%
2017264,423724.4311,8772,05884.8%
2018284,701780.0327,2441,93087.0%
2019293,561804.3339,3162,35386.5%
2020155,642425.3293,1612,75253.1%
2021410,8311,125.6591,5274,66569.5%
2022472,5871,294.8555,0034,40385.2%
2023549,1491,504.5664,3304,60082.7%
2024569,6771,556.5671,0435,14084.9%
2025582,7611,596.6679,7925,19985.7%
2026237,3221,311.2297,9412,32179.7%
Source: U.S. Department of Transportation, Bureau of Transportation Statistics T-100 Segment data.