Delta Air Lines is leaning into dynamic ticket pricing that uses artificial intelligence to individually determine the highest fee you’d willingly pay for flights, according to comments Fortune spotted in the company’s latest earnings call. Following a limited test of the technology last year, Delta is planning to shift away from static ticket prices entirely after seeing “amazingly favorable” results. Delta currently uses AI to influence 3 percent of its ticket prices, according to last week’s earnings call, and is aiming to increase that to 20 percent by the end of this year. Delta is no exception, but AI pricing looks set to supercharge the approach. Delta has taken heat for charging customers different prices for flights, having rolled back the decision to price tickets higher for solo travelers compared to groups in May.