We will have a price that’s available on that flight, on that time, to you, the individual,” Delta president Glen Hauenstein told investors in November, having started to test the technology on 1 percent of its ticket prices.

Prices are based on Delta’s internal data, such as historical bookings, as well as external variables like weather and market trends.

Delta Air Lines has begun to use AI to price tickets, charging people based on a calculation of what they should pay rather than a standard fare for all passengers.