You’d have to check the schedule for your specific dates but I think Santorini then Milos then Paros then Naxos and Athens would probably be the best order. 3 days in each sounds great. Or a small tweak: 2 days in Milos and then 4 days in Santorini (splitting time between 2 of the 4 caldera towns) or even 4 days in Paros (splitting time between Naousa and Parikia).
Glass-bottom boats with thatched canopies ply shimmering lagoons. Tanned locals in pareus (sarongs) play ukuleles. Ridged velvet-green mountains punctuate the skyline. Palm trees reach higher than any roof. This is reality in the Cook Islands, a 15-isle archipelago marooned in the South Pacific. Go on a mountain safari on the main island of Rarotonga, or head to Aitutaki to stay in an overwater bungalow and motu-hop to deserted sugar beaches that beg to be Instagrammed.
If the glitzy excess gets too much, escape to Fokos taverna for superfood salads and lamb chops, or Kiki's, an off-grid grill-shack overlooking Agios Sostis bay, where even Naomi Campbell has to queue for a table. Or cruise over to the tiny island of Delos, an archaeological sanctuary that once thronged with 30,000 sun worshippers (the temple is dedicated to Apollo, the Greek god of light).
Major airlines dominated their routes through aggressive pricing and additional capacity offerings, often swamping new start-ups. In the place of high barriers to entry imposed by regulation, the major airlines implemented an equally high barrier called loss leader pricing. In this strategy an already established and dominant airline stomps out its competition by lowering airfares on specific routes, below the cost of operating on it, choking out any chance a start-up airline may have. The industry side effect is an overall drop in revenue and service quality. Since deregulation in 1978 the average domestic ticket price has dropped by 40%. So has airline employee pay. By incurring massive losses, the airlines of the USA now rely upon a scourge of cyclical Chapter 11 bankruptcy proceedings to continue doing business. America West Airlines (which has since merged with US Airways) remained a significant survivor from this new entrant era, as dozens, even hundreds, have gone under.