Customers who book a Club World (business class) seat for travel between September 7 and December 11, 2016 will have the opportunity to upgrade to First one-way for free.
Customers who would like to take up the offer can do so by contacting their travel agent, or calling the British Airways contact centre on 0344 493 0787.
Sara Dunham, British Airways’ head of marketing, retail and direct, said: “We always get a great reaction from customers to our upgrade to First promotions. For no additional cost, travellers receive all the extra benefits of First, from the bespoke lounges to the comfortable suites on-board and personalised service. It’s a really nice way for us to recognise our customers and give them something back as a thank-you for their booking and their loyalty.”