As confirmed by Qantas, many of its passengers are still queuing across airports in Melbourne and Sydney after a major malfunction was suffered by the carrier's computer system.

The airline's Amadeus system, which is responsible for checking in travelers and their luggage, seemed to have crashed overnight and passengers are still facing delays of up-to an hour. Qantas, however, has promised that things will be back to normal by tomorrow morning.

The problem itself was fixed early this morning, but the situation went out of hand when the baggage systems in Melbourne and Sydney broke down as a result of the extra pressure. In some cases, the luggage of travels had to be flown separately just to keep the flights running.

The airline has now issued an apology to all customers who had to face delays.

About 50-80 airlines across the globe rely on Amadeus and it seems that all of them have been experiencing similar problems.

"Amadeus is usually a very reliable system. That said, not all systems work all of the time and from time to time they do go down. We try and manage those things but when you're dealing with a worldwide system and multiple airlines sometimes it's a bit hard to get things up and running right away", said Qantas spokesman David Epstein.