Palm Beach International doesn't have a single nonstop path to the Aegean, and after dozens of trips through this corridor, I've come to appreciate that the routing itself is where the strategy lies. There is no nonstop business class from West Palm Beach to Athens, so the real question becomes which connecting hub and which cabin product to choose for the roughly 11.5 hours of total flying time. Delta routes travelers through JFK or Atlanta before crossing the Atlantic, often on a widebody configured with Delta One suites, complete with a closing door and Westin Heavenly bedding — one of the more consistent hard products among the three US carriers on this itinerary. American funnels connections through Philadelphia or JFK, pairing with British Airways or Finnair metal at times depending on codeshare routing, so it's worth checking whether your booking lands you in a Club Suite or an older American 777 business seat, since the difference in privacy and lie-flat comfort is significant. United typically routes via Newark or Washington Dulles, using its Polaris cabin, which since the 2016 refresh offers direct aisle access on most widebodies deployed to Europe.
My insider tip: build in a two-and-a-half to three-hour buffer at whichever US gateway you choose, because PBI's limited morning departure bank means tight connections are common, and a missed transatlantic leg from a domestic delay is far costlier in business class than in economy. I'd also steer clear of connecting through JFK during peak summer thunderstorm season if you can help it — Atlanta and Newark tend to have marginally better on-time performance for evening transatlantic departures in July and August. Athens itself rewards an early arrival, since clearing passport control before the mid-morning wave of European short-haul arrivals can save you twenty minutes or more.
April, May, September, and October remain the sweet spot for this route, both for weather in Greece and for business class availability, as airlines open up more premium inventory once the peak summer crush eases. Fares and award space on this PBI–ATH corridor shift quickly given the connection-dependent nature of the routing, so setting up fare alerts and tracking price movements across all three carriers is the smartest way to catch a favorable window before it closes.