This is what Wille Walsh had to say ..
In February, Willie Walsh, IAG chief executive, said Delta was likely to struggle to secure regulatory clearance to combine with American, because the merged entity would be so large.
However, a merger between American and US Airways, the fifth-largest US airline, would be “potentially a positive development”, Mr Walsh said. Such a combination would have a better chance of obtaining regulatory clearance than one involving Delta.
US Airways is a member of the Star global airline alliance, and if it did merge with American, some people close to the situation said the combined entity would probably choose to be a OneWorld member.