A record 4 million passengers passed through Seattle-Tacoma International Airport in June, surpassing the previous record set in August 2014.
Airport spokesman Perry Cooper says when the numbers are counted for July, they'll likely top June, and August is always a busy month of the year.
Continue Reading Below
Global aviation tracker Official Airline Guide says Sea-Tac's growth this year is 12.4 percent over 2014.
In response, the Transportation Safety Administration added officers to screen departing travelers and U.S. Customs & Border Protection has 10 new people to welcome arriving international passengers.
But travelers say it's not enough. On a recent morning, hundreds of travelers spent almost an hour shuffling through the security screening rope maze to reach the machines that would search their luggage.
The previous monthly record was 3.9 million.