Business Minister Heather Humphreys says she has been speaking with the Competition and Consumer Protection Commission.
People should get their money back for flights they are due to take during travel restrictions, according to the Business Minister.
Customers have reported being told by an airline that they will be given a refund, and then later offered vouchers.
People who have booked flights with airlines including Ryanair and Aer Lingus say they received confirmation of a cash refund, and that their request was being processed. They were later offered vouchers, to be used within the next 12 months.
Business Minister Heather Humphreys says she has been speaking with the Competition and Consumer Protection Commission:
"They are entitled to their money back obvs under law so therefore, they should get the money back under law but there are some issues that need to be teased out yet and I'm working with the Consumer Protection Commission on that matter."
She added that:
"You get a refund, there's no doubt about that, but whether it's a cash refund or whether it's through vouchers ... I'm looking at that at the minute".
Under EU law, customers are entitled to a refund for flights that do not operate. The European Consumer Centre Ireland says where a flight is cancelled an airline is "obliged to respect the passenger rights" and that remains unchanged, even under circumstances such as COVID-19.