https://travelweekly.co.uk/articles/...ss-from-august
If this holds true for all of Spain, then they are looking at August for domestic market and some time later for overseas visitors.
I think Greece and Portugal are looking at holidays with social distancing measures but have implied it will likely be domestic or near continent visitors who can access the countries initially by driving.
Many of the Transport Select Committee hearing witnesses on Wednesday suggested 3 to 5 months as optimistic period for restarting operations. The reality is everyone awaits some government guidance (both UK and global) as to how we get the world moving again. Until then, the vacuum is filled with best guesses. Maybe we will get something more concrete in BoJo's roadmap on Sunday - we can but hope...