The first jet bridges are now installed. The new 6-mile-long baggage screening and delivery system is being tested. The first airline agent desk at a gate just went up. Most moving walkways are finished and working but covered for protection from construction dust.

“We’re at the point where we are meeting major milestones about every day” among the 30,000-plus separate construction activities, or projects, that are part of the first phase, said Mike Williams, the airport program director. “We are on schedule and will open on time.”