United's Polaris product connects via its US hub cities to a European gateway, with the 1-2-1 lie-flat pod and Polaris lounge access if you're routing through a United hub — solid for travelers who want familiarity and Star Alliance miles. Lufthansa's newer Allegris suites, flying on select A350s, are the standout in this lineup: enclosed lie-flat suites with genuinely good privacy, connecting through Frankfurt or Munich. SAS offers clean Scandinavian design and connects via Copenhagen, a pleasant hub with a fast, modern business lounge. Turkish Airlines routes through Istanbul and remains one of the better values in premium cabins worldwide, backed by DO&CO catering that consistently outperforms most European carriers. TAP Air Portugal's Lisbon connection is worth considering if you want to break up the journey — Lisbon is an easy, walkable stopover city. Austrian Airlines is the one product here still running a 2-2-2 angled-lie-flat configuration rather than full 1-2-1, so it's the tradeoff pick if schedule or price wins out over seat privacy. LOT Polish, via Warsaw, is a solid budget-conscious option within this premium set.