Malmo's proximity to Copenhagen makes it one of Scandinavia's more deceptively accessible business class destinations, provided you know how to route around the fact that no carrier flies nonstop from the Pacific Northwest. There is no direct business class from Seattle to Malmo — every itinerary connects through a major European hub, with SAS via Copenhagen, Lufthansa via Frankfurt or Munich, and KLM via Amsterdam offering the three most sensible routings. My preference after years flying this corridor is SAS through Copenhagen: Malmo's Sturup Airport sits close enough to Copenhagen that many travelers actually fly into CPH and take the 35-minute train across the Öresund Bridge, which is often faster and more reliable than the short regional hop to MMX. SAS's A330/A350 business class, with its direct-aisle-access flatbeds, is a comfortable long-haul product, and their Copenhagen hub is refreshingly efficient compared to the sprawl of Frankfurt.
Lufthansa's option, connecting through Frankfurt or Munich, appeals if you want a taste of the airline's newer Allegris business suites, though not all aircraft on the transatlantic Seattle leg have been retrofitted yet, so it's worth checking your specific equipment before booking. KLM's Amsterdam connection is a solid alternative, particularly for travelers who appreciate Schiphol's single-terminal simplicity and KLM's reliable World Business Class seat on their 787 and A330 fleets flying the Seattle route. My insider tip: book the SAS routing with a long enough Copenhagen layover to use their Gold lounge in the non-Schengen zone, then take that scenic train transfer instead of the puddle-jumper — it saves the hassle of a tight regional connection and gives you a proper Öresund crossing.
Seasonally, May through September is when this route's fares soften, as Scandinavian carriers ramp up capacity to meet the Nordic summer travel surge, and last-minute business class awards become more attainable on SAS in particular. Given how erratic pricing can be on a route with no single dominant carrier, setting up fare alerts across SAS, Lufthansa, and KLM is the smartest way to catch the inevitable dips before they disappear.