Which cryptocurrencies can you use to pay for tickets and services directly with your airline?

Just the other day, I was using to book a flight, and it made me consider cryptocurrency. You know, if airlines began accepting more digital currencies directly, that would be really awesome. Like, imagine effortlessly paying for your tickets using Bitcoin or maybe even Dogecoin eventually! It would undoubtedly make things feel more current and maybe even cut down on some fees. While looking through Flightd's options, I had this idea!