Just shy of its 2019 record, SEA clocked in with 50,887,260 passengers in 2023. That was up 10.7% from 2022.

Sea-Tac International Airport broke the 50 million passenger mark last year for the first time. A total of 51,829,239 passengers passed through the airport in 2019, a year-over-year increase of 3.97%. This continues the streak of annual passenger growth the airport has had since 2009.