It's more than six months since coronavirus restrictions led to the widespread cancellation of flights to and from Ireland.
While airlines have worked through a massive backlog of refunds, some customers are still finding themselves waiting for cash refunds or vouchers to be processed.
On today's Pat Kenny Show, travel expert Eoghan Corry answered listener questions about the process - including the best way to get in touch with an airline about pending refunds.
He explained: "If the trail has gone cold and you're worried... the Facebook message and call line aren't ways you're going to get a quick response, given the work constraints.
"The two best ways of getting in touch with the airline are a direct tweet - they tend to react to that - and the web chat. The web chat has been working... although particularly with Ryanair over the past two or three weeks there has been slowness reported.
"Do bear in mind I would still hold out great hope you will get not just get a voucher, but also the offer of money back."
He noted there has been been a few cases where people have received a voucher without having asked for it - but those people are entitled to their money back.
However, it might take a "little bit of time" to tie companies down to a refund.
Ryanair CEO Michael O'Leary has insisted all cash refunds have been processed, other than for customers who've booked through online 'screen-scraper' websites and used fictitious addresses.
Mr Corry gave the airline credit for having worked through a huge amount of refunds in recent months, but said it's "certainly not the case" that all refunds have been paid by now.
He said those still waiting for a refund are likely those who've booked through online sites, although potentially also those who've booked through some of the licensed travel agents operating here in Ireland.
One listener asked about a newly-issued credit note from a travel agent, which lasts for nine months - after which the customer can claim a cash refund.
Mr Corry explained: "They're part of the state guarantee scheme... if anything happens your tour operator or travel agent, the money is safe.
"The reality is you can actually say 'I need the refund now'... but it throws you into that bureaucracy.
"The processing system isn't really keeping up with the demand."
However, he did stress that anyone in that situation is entitled to a cash refund, and noted that their money is safe in the meantime due to the guarantee scheme.
You can listen back to the full podcast below: