Four carriers compete for this Minneapolis to Poznan business class market, each with a genuinely different product. Delta's Delta One Suite gives you a door that closes, a 1-2-1 layout on widebody aircraft, and a Tumi amenity kit — it's the most private option if you're routing through Amsterdam or a European gateway on a Delta metal segment. United's Polaris cabin also runs 1-2-1 with a proper lie-flat pod, Saks Fifth Avenue bedding, and Polaris lounge access at hubs like Chicago or Newark, which matters if your connection has any dwell time. American's Flagship Business uses a lie-flat suite with Casper bedding and Flagship Lounge access domestically, a solid choice if your positioning flight originates from a Flagship city. SAS Business, meanwhile, leans into Nordic minimalism — lie-flat 1-2-1 seating, sustainable dining, and a Scandinavian design sensibility that's a nice change of pace if you're routing through Copenhagen. All four give you fully flat sleep on the long transatlantic leg, which is the part of this journey where cabin choice actually matters most.