If you're seeing a double-charges or overcharges for one booking, don't worry! This is completely normal, as airlines will place an authorization for the purchase to ensure that there are ample funds in the account before processing the payment. Once the official purchase is processed, the authorization will drop off within a few business days, leaving just the one official charge.
You may also be interested in
Why was I charged $1 by Hopper?
I got an error while booking in the app!
I was charged but don't have a confirmed booking
