More than 17,000 US flights cancelled in five days around Christmas - and travel chaos is far from over

Independent - Airlines are still struggling to get back on track with even more cancellations scheduled in the coming days as Americans begin return trips.The cancellations have been coupled with drastic delays affecting nearly 40,000 flights since 22 December.Southwest Airlines appear to be among the hardest hit airlines, with 42 per cent of flights being cancelled on Christmas Day FlightAware figures show.