Carving out an efficient path to Scandinavia from the Triangle requires a bit of routing savvy, since no carrier flies RDU to Copenhagen nonstop. The reality is that business class from Raleigh to Copenhagen almost always funnels through a major East Coast or Midwest hub, with Delta via JFK or Amsterdam-adjacent hubs, American via Philadelphia or Charlotte, and United via Newark or Chicago offering the most sensible connections onto widebody transatlantic metal. Delta's One Suite on the A330-900neo or A350, when it operates onward legs toward Northern Europe, delivers a genuinely private sliding-door experience, while American's Flagship Suite on its 777-300ER (often routed through Philadelphia) remains one of the more consistent hard products in the US fleet. United's Polaris seats, found on the 767-300ER and 777-200, are reliable workhorses on this corridor, particularly out of Newark, which tends to have smoother connection times than Chicago for RDU originating passengers.
Having connected through all three hub cities on this itinerary more times than I can count, my advice is to prioritize a layover under two hours only if you're checking bags through to CPH — Copenhagen's baggage handling is efficient, but a rushed connection stateside erases that advantage. A lesser-known trick: booking the earliest RDU departure of the day (typically the 6 a.m. bank) sets you up for evening transatlantic departures with the freshest business class catering and the best chance of an empty middle seat in premium cabins during shoulder season. Copenhagen Airport itself rewards early risers, as immigration lines swell dramatically after 9 a.m. once the wave of overnight arrivals from Asia and the Gulf lands simultaneously.
Late spring through early autumn — May through September — consistently offers the strongest combination of schedule reliability and award availability on this route, as Scandinavian daylight and mild temperatures coincide with airlines adding frequencies. Because fares and premium inventory shift quickly across three competing carriers and multiple hub options, setting up automated fare tracking for this specific city pair is the smartest way to catch a rare release before it disappears.