New app lets travellers bid for empty seats on planes 

A new app has been launched that allows travellers wanting to bag bargain flights to bid for empty seats on planes.New tech start-up Air Ticket Arena, which is based in the UK, allows passengers to pay for flights for just a fraction of the price.The only catch is travellers can only choose their flights up to two weeks in advance and only find out if they have a seat on the plane just 48 hours...