Trondheim rarely tops the transatlantic wish list, which is exactly why savvy business travelers should pay closer attention to it. There's no nonstop option: business class from Dallas to Trondheim always routes through a major European hub, with the three realistic carriers being SAS via Copenhagen or Stockholm, Lufthansa via Frankfurt or Munich, and KLM via Amsterdam. Total journey time typically runs 12-14 hours including connection, against a raw air time of roughly 10 hours if you could fly it direct. Each carrier brings a genuinely different onboard experience to this itinerary, and having flown all three routings multiple times, I'd say the choice of connection matters as much as the choice of airline.
SAS is the natural fit given Trondheim is a domestic Norwegian destination for them — their A330/A350 business class offers fully flat seats with direct aisle access on the widebody fleet, and the Copenhagen or Stockholm connection onto a Trondheim-bound narrowbody is refreshingly quick, often under 90 minutes. Lufthansa routes through Frankfurt or Munich, and depending on aircraft you may find yourself in the newer Allegris business suite or the older long-haul product — worth checking your specific aircraft before booking since the experience varies considerably. KLM's Amsterdam connection is my personal favorite for reliability; their 787 and A330 business class seats are dependable, and Schiphol's connections to Scandinavian regional jets tend to run smoothly even in winter weather that grounds other hubs.
One insider tip: book the SAS-operated final leg into Trondheim rather than a codeshare regional partner whenever possible, as SAS mainline handles bags more reliably on tight connections, which matters given Trondheim's smaller terminal has limited recovery options if luggage misses the transfer. May through September brings both better weather for the fjord scenery and the most competitive business class fares on this corridor, as Scandinavian leisure demand shifts pricing dynamics. Given how much these fares fluctuate hub-to-hub, setting up fare alerts across all three carriers is the smartest way to catch a genuine deal before it disappears.
