British American Airlines ?
If you want a really BIG airline:
Tom Horton, the American Airlines president, said he believed that restrictions on the foreign ownership of US carriers would be relaxed before he retires — he is 50.International Airlines Group, which owns the BA and Iberia brands, was given regulatory permission to form a transatlantic alliance with AA last year. The $US7 billion ($6.4bn)-a-year joint venture allows them to co-operate on schedules, sell each other’s flights and share revenues from transatlantic operations.
They are already co-ordinating flights between London and New York. And if they do merge, they will be the biggest airline company in the world.