Skopje remains one of the more delightfully obscure endpoints in European business class travel, and reaching it in comfort requires a bit of routing savvy. There is no nonstop option, so business class from Seattle to Skopje inevitably involves a transatlantic hub connection, with the two most sensible options being Delta's partnership routing through Amsterdam or Frankfurt, or Turkish Airlines via Istanbul, with Lufthansa offering its own Frankfurt or Munich connection into the Balkans. My preference after many iterations of this itinerary is Turkish Airlines, whose long-haul 787 and 777 business cabins, plus their justly famous lounge in Istanbul, make the mid-journey layover feel like a destination rather than a chore, and their onward Istanbul-Skopje hop keeps you within the same alliance ecosystem for smooth baggage transfers.
Delta flyers should look at Seattle's growing transatlantic strength out of SEA, particularly seasonal nonstops to Amsterdam, which pair well with KLM's World Business Class before a short connection down to Skopje via Delta's SkyTeam partners. Lufthansa's routing tends to suit those wanting a Frankfurt stopover with access to the airline's first-class lounge even in business class ticketing on select fare classes, and its A350 and 747-8 business seating (ahead of full Allegris rollout on this route) still delivers a reliably comfortable long-haul experience. An insider tip worth noting: Istanbul's connection times to Skopje are often generous enough to shower and reset at the Turkish Airlines lounge, which is a rare luxury on a route this niche—few travelers realize this layover can function as a genuine rest stop rather than a rushed transfer.
Seasonally, January through March and October into November consistently offer the softest business class pricing on this corridor, as Balkan leisure demand dips and airlines discount premium inventory to fill transatlantic connections. Given how thin business class allocations are on this route, setting up automated fare alerts is the smartest way to catch these seasonal dips before award and paid inventory disappears.