The airline lineup for this route is genuinely strong. United's Polaris product out of Newark gives you a lie-flat pod in 1-2-1 configuration plus Polaris lounge access before departure, which matters on a route where you're often facing a long layover in a European hub. Lufthansa's newer Allegris suites, rolling out on select A350s, are worth chasing if your itinerary lines up — they're the most private hard product in this comparison. Turkish Airlines routes through Istanbul and pairs its lie-flat seat with DO&CO catering, consistently rated among the better business class meal services in the industry. SAS, TAP Air Portugal, Austrian, and LOT round out the options, each connecting through their respective home hubs — Copenhagen, Lisbon, Vienna, and Warsaw. Austrian is the outlier here with a 2-2-2 angled lie-flat rather than full lie-flat 1-2-1, so if aisle access matters to you, that's worth knowing before you book.