seems like a good option to buy a ticket online without a credit card but not sure if it works online?

guess not,

Answer to your question: It is very difficult to book or purchase a ticket on-line without a credit card.

(I won't bore you with my personal belief that a credit card is just another part of an international Capitalist scam to make you buy things you don't need and pay a 15% to 20% charge over the actual cost for the privilage of paying later.)

What you can do, however, is pretend to book a ticket (but log off before you actually buy the ticket) to compare prices for different airlines.

With that information, which airlines and routes are cheapest on-line, you can puchase your ticket from other sources...either from the airline office or from a ticket agent. Pay cash, they still do accept money.

You might be surprised, like I was, that my Thai International ticket, Athens to Bangkok, was actually 200 Euro less from the ticket agent than if it was purchased on-line...but that's another story. (Special discount through agents, not available on-line)