August schedules data from Innovata shows the big three US carriers leading the way in terms of total capacity by weekly ASKs.
Delta Air Lines, which grew capacity 5.7% in August over the same month last year, according to Innovata schedules, replaced United Airlines as the largest carrier by capacity for the month. American Airlines sits behind as third largest carrier, though combined with US Airways - the proposed merger with whom the US Department of Justice is challenging - it would have been the largest carrier by capacity in August.
Overall capacity among the 30 biggest airlines by ASKs in August was lifted 5% over the same month last year.
Another US carrier Southwest Airlines was the largest low-cost carrier by weekly ASKs in August according to Innovata schedules data.
There was relatively small capacity growth August from the two biggest European low-cost sector operators, EasyJet and Ryanair. But fast-expanding Norwegian, Vueling and Turkish carrier Pegasus all increased capacity sharply in August over the same month last year.