I find it interesting that an airline, one of a different class of companies that haven't previously accepted BTC, does so now. Not to mention that it is a 99.8% state-owned company.
I love bitcoin, but buying airline tickets with bitcoin is a terrible idea. Airlines go bust all the time with zero warning and anyone who pays with cash/bitcoin is going to be out a lot of money.
Not very likely in this case - it's a state-owned flag carrier, it's been propped up a few times already and it didn't go under when it had massive losses so it won't happen now when it's finally turning a profit.