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.

Last year, Delta Air Lines announced it was testing out dynamic pricing on some flights using tools built by the tech company Fetcherr. And while the test was initially limited, executives from the company announced that 3% of flights now use AI pricing, and they hope to sell 20% of all tickets using a dynamic price by the end of the year.