The CEO of Ryanair says the Irish carrier has seen its bookings doubled since last weekend.
The airline plans to operate over 1,000 daily flights from July 1st.
The company is also waiving its flight change fee for all customers who book to travel in July and August.
Eddie Wilson told Newstalk Breakfast: "People are booking in their thousands, our bookings have doubled since last weekend.
"And I think now that restrictions are beginning to be lifted - life has largely returned to normal in mainland Europe.
"You've got Spain, Italy, Greece, Portugal all open for business".
"The big markets for us out of Ireland are Spain and Portugal, and we are seeing a big uptake in business there since last weekend."
"Largely now people are seeing their returning to work, restrictions are being lifted and people are now looking at the summer holidays".
He denied a claim that the company was pointing customers towards an insurance policy, which would be voided if people travel in contravention of Government advice.
"People can buy insurance on the basis of what's covered in the policy, and people will make their own decision on insurance cover".
In a separate statement on this, the carrier said: "This Irish Times’ claim is rubbish. Ryanair’s insurance claims will not be rejected on the basis of the Irish Government advisory.
"In any case, thousands of Ryanair customers are booking flights to travel over the next 12 months, whereas the Government advisory is likely to be withdrawn (as it has been in most other EU countries) over the coming days".
Mr Wilson also said the airline is "flying through" refunds, having completed about 40% of them.
"We've about 35 million, we've got through about 15 million at the moment.
"The good news for people is that now that things have opened up again, they can still use a free move... those who want to keep a refund or want a refund processed that's going to happen over the next number of months.
"Since we got everybody back to work here, we are working like gangbusters here now to get those refunds processed".
On the 14-day quarantine period for people coming into Ireland, he said: "If you look at what's happened in Europe, everybody where you've got land-based borders - they're unimplementable.
"Europe is now back to normal; the idea that we would have quarantines here where people self-isolate for 14 days it just doesn't work".
"If you arrive at an airport and get on the 747 bus here and go into town to go somewhere else to self-isolate: that's not a quarantine at all.
"The quarantine can only work if you were to impound people at the airports and they are ineffective.
"If you're going to have a quarantine, have a quarantine - but you can't have a quarantine that doesn't work".
