Palm Beach International's Signature Grand Aviator terminal spoils travelers before they even leave Florida, but the real strategy begins with understanding that there is no nonstop option for business class from West Palm Beach to Warsaw — every routing funnels through a major domestic or transatlantic hub, making carrier choice and connection city the two variables that matter most. American, Delta, and United each offer viable paths, typically connecting through their respective fortress hubs (American via Charlotte or JFK, Delta via JFK or Atlanta, United via Newark or Chicago) before a transatlantic hop into Warsaw Chopin Airport. Having flown this corridor repeatedly over the years, I've found that United's Polaris seats on the 767 and 777 fleets, with their direct-aisle access and Saks-sourced bedding, offer a genuinely restful redeye into Central Europe, while Delta's A330 and A350 Delta One suites provide similarly private sliding doors and consistently excellent Poland-adjacent connectivity through Amsterdam or Paris codeshares when schedules align.
The insider move here is timing your domestic connection deliberately: booking a same-airline through-fare rather than piecing together separate tickets protects you if the first leg from PBI runs late during South Florida's frequent afternoon thunderstorm season, which peaks June through September — all the more reason to travel in the shoulder months. January, February, March, October, and November not only sidestep Florida's storm disruptions but also coincide with softer transatlantic business class demand, since Warsaw sees its heaviest leisure and conference traffic in late spring and summer. Arriving into WAW during these quieter months also means faster immigration processing, a small but real comfort after a long overnight flight.
My longstanding advice for this route is to build in at least a two-hour connection window at your US gateway, since PBI's limited early-morning departure bank means a missed connection can cost you the better part of a day. Given how much these business class fares fluctuate seasonally between the three carriers, setting up automated fare alerts is the smartest way to catch a premium-cabin deal before it disappears.