Poznan remains one of Europe's more delightfully under-the-radar business class puzzles, and connecting through Omaha only adds to the intrigue. There's no nonstop option, of course — that ~10.5 hour flight time is a composite of at least two legs, since business class from Omaha to Poznan always requires routing through a major hub, typically Amsterdam, Frankfurt, Munich, or Warsaw depending on whether you fly Delta, United, or LOT Polish Airlines. My preferred combination after years of testing this corridor is Delta out of Omaha connecting to a transatlantic partner flight into Amsterdam, then a short regional hop into Poznan — Delta's domestic-to-international connection at OMA is refreshingly painless given the airport's compact single-terminal layout, so you're rarely sprinting for a gate.
If your itinerary routes through LOT's Warsaw hub, that's actually the smartest play for Poznan specifically, since LOT operates the most frequent onward service into POZ and their business class on the 787 Dreamliner offers proper lie-flat seats with direct aisle access in a 1-2-1 configuration — a meaningfully more comfortable long-haul product than what you'd get squeezed into a narrowbody European leg on a Star Alliance codeshare. United routes typically funnel through Frankfurt or Munich, where the Lufthansa business lounges make for a pleasant enough layover, but I'd steer toward the Warsaw connection whenever schedules allow — it shaves transfer time and puts you on Polish soil for the final approach, which feels fitting.
One insider tip worth noting: LOT frequently prices its business class award space more generously on the Warsaw–Poznan sector than competitors do on comparable short hops, so booking the international long-haul and domestic Polish leg as a single ticketed itinerary often unlocks better seat availability than booking separately. January through March and again in October and November are your best windows for softer fares, as Central European business travel dips outside peak summer and the Christmas markets rush. Given how much these fares fluctuate hub-to-hub, setting up automated fare alerts for this specific routing is the only reliable way to catch the right combination before it disappears.