While British Airways has not confirmed a specific figure, example fares provided put the increase at around nine per cent Sign up to Simon Calder’s free travel email for expert advice and money-saving discounts Get Simon Calder’s Travel email Get Simon Calder’s Travel email Email * SIGN UP I would like to be emailed about offers, events and updates from The Independent. Read our Privacy notice British Airways (BA) has confirmed it will increase fares available to members of its Avios loyalty