Good day!
Here I am in Brazil, I bought four domestic flights with Azul and now I'm getting told by the check in agents that they have no way to enter my MileagePlus number (it wasn't possible to enter it online either on the Azul website, even though United says so). Should I just go ahead and fly and contact United when I come back?
Seems like it will be hard to get those miles!
Thank you everybody!