The easiest, quickest, and most secure is to use a cryptocurrency like Bitcoin. These transactions because of the anti-fraud issues allow the payment systems online to immediately verify payment and issue the ticket.

Natural beauty use a credit card. You need to have a 3-D secure card for payment to go through without too much problem. If you don’t have 3D security on the card, 99% of the time your card will be rejected at some point in the transaction.

And some agencies, like Future.Travel allow you to make a booking online and pay through local bank transfer, atm payment, or cash at a local payment collection point.