The update says the tournament is due to begin on 11 June, with fans moving toward 11 stadiums across the country. That travel map is part of the appeal of a World Cup in America - but also part of the risk.
This is not unusual for major tournaments, but the American scale gives it a different feel.
The report says the TSA expects to screen 18.3 million passengers and crew between 21 May and 27 May, an early sign of the summer strain. It also says around six million people could arrive from abroad for the World Cup.
That makes preparation more than a transport story. For football, smooth airports mean fuller stadiums, calmer host cities and fewer disrupted supporter plans. If the queues stay manageable, the tournament atmosphere should build faster.
The World Cup is always about more than the action on the pitch. It is about movement, logistics and whether a host nation can make a global event feel welcoming. Reports suggest US authorities believe staffing is in place to keep delays down. The next storyline to watch is whether that confidence holds once the first real wave of travelling fans begins to land.