On the cabin side, United Polaris remains the most familiar option for US travelers, with a proper lie-flat pod in 1-2-1 configuration, Polaris lounge access at Newark, and Saks Fifth Avenue bedding for the overnight leg. Lufthansa's newer Allegris suites, rolling out on select A350s, add a sliding door and more personal storage than the older Lufthansa product — worth requesting specifically if your itinerary routes through Frankfurt or Munich. SAS brings a clean, minimalist Scandinavian cabin with genuinely good Nordic-inspired dining, while Turkish Airlines pairs a solid 1-2-1 lie-flat seat with DO&CO catering and a stopover-friendly Istanbul lounge that's worth building extra time around. TAP Air Portugal, given its Lisbon hub, is often the shortest and most logical connection geographically, with Portuguese wine service that fits the overall trip theme. Austrian Airlines is the outlier here with a 2-2-2 angled-lie-flat layout rather than full 1-2-1 — still comfortable, but worth knowing before you book if aisle access matters to you. LOT Polish rounds out the list via Warsaw, a solid backup option when other carriers price up.