Chinese airlines take 'all you can fly' promotions international

China Southern Airlines rolled out an "all you can fly" international pass Tuesday for its frequent flyers, expanding an unlimited domestic flights program launched three years ago.

The carrier joined two other cash-strapped Chinese airlines in offering passengers access to unlimited flights at a discount to encourage air travel. Right now there are too many domestic flights for the level of demand and airlines urgently need to soak up excess capacity by filling more international flights, industry analysts said.