Trondheim rarely appears on the radar of American business travelers, which is precisely why the routing deserves attention: there is no nonstop option, and booking business class from Reno to Trondheim requires a thoughtfully constructed itinerary through one of three credible European gateways—Frankfurt via Lufthansa, Amsterdam via KLM, or Copenhagen/Oslo via SAS. Total journey time runs close to 11.5 hours of air time, but with connections factored in, travelers should budget a full travel day. My preference after dozens of iterations of this routing is the SAS connection through Copenhagen, since SAS operates the Trondheim leg frequently and their narrowbody business class, while simple, is efficient for the short Scandinavian hop after a long-haul flight.
For the transatlantic segment, Lufthansa's Allegris business class—where available on the Frankfurt route—represents the newest hard product among these three carriers, with sliding privacy doors and a more residential feel than the older long-haul business seats. KLM's World Business Class on their 787 or A330 fleet remains a dependable, if unspectacular, choice out of Amsterdam, and its connection bank to Trondheim is well timed for morning arrivals. Reno's airport itself is refreshingly low-stress: arrive 90 minutes before an international connection routing and you'll clear check-in with time to spare, since RNO has none of the security theater of larger US gateways.
The insider tip worth knowing: SAS periodically prices Trondheim as a domestic add-on with minimal premium over a Copenhagen or Oslo endpoint, so pricing the itinerary with Trondheim as the final destination—rather than booking to Oslo and adding a separate domestic ticket—often yields better value and guaranteed through-checked luggage. Late spring through early autumn, particularly May through September, brings both favorable Trondheim weather and the most competitive award and revenue fares on this corridor. Given how thin inventory can be on the Scandinavian connecting flights, setting up fare alerts for this specific routing is the smartest way to catch favorable pricing before it disappears.
