BOS is basically split between Delta and US Airways and American. Delta is the largest passenger carrier, American has the most flights and US Airways serves the most cities. Currently American has 10 gates in Terminal B, US Airways has 15 gates in Terminal B and Delta has 14 gates in Terminals A (Shuttle) and C (Mainline, Express, ACA, Comair). In 2004, however, Delta will have 24 gates consolidated in Terminal A, which will be only for Delta, Air France, Alitalia and their other partners. By that time, Delta could be the largest overall airline in BOS and could consider BOS a hub.