We won't be certain how holiday resorts abroad manage their coronavirus measures until they've had the first influx of tourists, according to a travel expert.
Travel journalist Eoghan Corry said the 'obstacles are enormous' for resorts such as Benidorm when it comes to implementing social distancing measures.
Spain has reopened its borders to most European tourists, although the Department of Foreign Affairs here are continuing to advise all citizens to avoid non-essential travel.
People are also being asked to self-isolate for 14 days after they arrive back in the country.
Dublin Airport is said to be slightly busier now compared to last month, while many more flights are due to resume from July 1st.
Speaking on The Pat Kenny Show, Eoghan Corry - editor of Air and Travel Magazine - said the number of flights in and out of the country is gradually increasing.
He said: "We had about 12 flights coming to and from Dublin every day... we are now up to close to 30 on some days.
"We're getting the services... [but] we probably aren't getting the bookings or the large numbers of passengers.
"The big test is July 1st - Ryanair day. How many people will have booked those amazing prices that they're offering in the sale, and is causing such discomfort to the government who are telling people not to engage in leisure travel?"
He said the Spanish tourist industry is making sure health & safety measures are in place for the likes of pools, hotels and restaurants.
However, he noted: "It's a little bit of an uncertainty - everyone is being told the borders are open, but until the first people start returning and reporting on the situation from the ground, we can't be certain.
"The obstacles are enormous... a lot of management has got to be put in place."
Mr Corry suggested Benidorm - where authorities have significantly reduced capacity on beaches - would "need almost 80km of coastline" for full social distancing if they had their usual number of visitors.
He noted: "It won't be a huge rush of tourists, so I won't expect them to come under pressure - [although] I will expect a lot of things to evolve very, very quickly in the first two weeks of July."