going on a virgin cruise from portsmouth UK, whats the best airport to fly into

[aviators99]

I'm in the process of planning this now.  On the September 3rd (now "Celebration") cruise from Portsmouth.  So planned a trip around it.  Flying FLL-LGA (JetBlue), EWR-ATH (Emirates), ATH-JTR (Aegean), JTR-LHR (British), Overnight in London, Train Waterloo-Portsmouth.  Then after cruise, train Portsmouth-Gatwick (Have to make a 4pm flight that day!), LGW-OPO (British), train Porto-Lisbon, LIS-MIA (TAP). 

Will be 2 days in Athens, 3 days in Santorini, 2 days in Porto, 1 day in Lisbon.  I looked at hotels in Portsmouth and Southampton, and didn't see anything that was appealing to me.