Global air capacity is up slightly this week to 37.2 million seats, an increase of about 500,000 compared with last week, according to OAG. In North America, carriers added 850,000 seats, about 500,000 of which were on Southwest Airlines, which at this point is the largest airline in the world in terms of capacity. John Grant, an OAG analyst, said that with more than 30,000 seats added back in Denver, Chicago Midway and Washington-Baltimore, Southwest is clearly seeing sufficient signs of recovery to continue adding back capacity at its hubs. Grant also said booking searches are up this week, and TSA checkpoint traffic is up 10% week over week, though still only 13% of what it was this time last year. Overall global capacity, meanwhile, remains about 78 million seats below last year's levels. Grant said that until demand recovers, traveler confidence is restored and, importantly, bookings are made not just for the next few weeks but further out into September and October, “capacity growth is likely to remain patchy and spasmodic in nature."