I believe only Delta has said they will eventually use that kind of pricing, but I dont think they actually started yet. Ive tried checking the price of airline tickets on different devices that are both mine or not mine, and the prices are always the same whether they know its me or not.

The only thing “dynamic” about airline ticket pricing is that it changes over time, but that is not personalized pricing where people get charged different amounts at the same time. The article is conflating those two things