There's no nonstop path between Seattle and Gothenburg, which means the routing you choose matters more than usual on this Scandinavian itinerary. Business class from Seattle to Gothenburg realistically funnels through three credible options: SAS via Copenhagen, Lufthansa via Frankfurt or Munich, and KLM via Amsterdam, all connecting onward with a short intra-European hop. Having flown all three combinations, I'd steer discerning travelers toward SAS's Airbus A350 business class on the transpacific-style long-haul leg out of Seattle, which offers direct-aisle-access pods and a genuinely Scandinavian sensibility to the service — think understated design, excellent Nordic-inflected dining, and a calm cabin atmosphere that suits the overnight eastbound crossing. Lufthansa's newer Allegris business suites, where available on the SEA-Frankfurt sector, are worth chasing for the extra privacy panels, though availability on this specific city pair can be inconsistent since Allegris rollout is aircraft-specific rather than route-guaranteed.
The real craft in booking this journey is in the connection. SAS via Copenhagen is my preferred routing for the final GOT hop, since CPH's compact layout makes for one of the easier business-to-domestic transfers in Europe — you're rarely more than a fifteen-minute walk from your connecting gate, even with a tight 70-minute buffer. KLM via Amsterdam works well too, particularly if you want to sample the KLM Crown Lounge, but Schiphol's size demands a slightly longer connection window, especially during the June-August peak when Amsterdam's security lines swell with holiday traffic. My insider tip: build in a Copenhagen or Amsterdam stopover of a day or two rather than treating the connection as a pure transfer — both airlines allow free stopovers on award and even some revenue business fares, and it transforms an 11.5-hour slog into a genuinely enjoyable two-city trip.
Seasonality favors late spring through early autumn for this route, with May, June, July, August, and September consistently producing the strongest premium-cabin availability and fare movement, largely tied to Scandinavian summer travel demand and Lufthansa's expanded frequencies. Because inventory across SK, LH, and KL shifts quickly during these months, setting up fare alerts remains the smartest way to catch a business class release before it disappears.