United ends 2012 as world's biggest airline, Emirates third. Turkish and Lion Air the biggest movers

United Airlines, following its merger with Continental, has ended 2012 as the world's biggest airline measured by available seat kilometres for the current week, ahead of second placed Delta, whose capacity fell 0.3% year on year, according to Innovata. Fast growing Dubai-based carrier Emirates is the world's third biggest airline by this measure, and could be in second place by the end of 2013 if the past year's growth rates are maintained.

Southwest Airlines remains easily the largest LCC, while Lion Air and Jetstar have each climbed the LCC top 10, to sixth and seventh places respectively, overtaking Westjet. Atlanta Airport (just) remains the world's largest, ahead of Beijing Capital Airport, in terms of seat throughput for the week, but this ranking seems certain to reverse in 2013.

The biggest movers in the overall World Top 50 list include Turkish Airlines, which jumped seven places to rank 15th globally, while Indonesian carrier Lion Air vaulted eight places to enter the global Top 40 for the first time. Iberia and India's Jet Airways fell four and seven places in the 2012 rankings, respectively.

Global Airline Alliances collectively grew capacity at higher than the world rate, with SkyTeam expanding fastest of the three majors, although Star Alliance remains easily the largest.