LEGO headquarters and the wind-swept toy capital of Denmark are not exactly synonymous with nonstop transatlantic service, and that's the first thing seasoned travelers need to understand: there is no direct business class from Washington Reagan to Billund, since DCA's runway lengths and customs infrastructure simply don't support widebody transatlantic aircraft. Instead, the smart routing runs through Copenhagen, Amsterdam, or Frankfurt, connecting onward via SAS, KLM, or Lufthansa to Billund's compact regional airport. I've made this connection more times than I can count while researching LEGO House and Jutland's design scene, and Copenhagen remains my preferred gateway — SAS operates the CPH-BLL hop frequently, and their A320 business cabin, while not glamorous, gets you there fast after a proper long-haul rest.
For the transatlantic leg, Lufthansa via Frankfurt is worth prioritizing if your itinerary allows a slightly longer connection: their new Allegris business suites are rolling out on select US routes, and even the legacy business seat with direct aisle access on 747-8s and A350s beats older configurations. KLM's Amsterdam routing offers World Business Class with lie-flat seating on their 787 and A330 fleet, and Schiphol's efficient transfer process between non-Schengen and Schengen flights makes the KLM-to-connecting-carrier handoff smoother than most European hubs. My insider tip: if connecting through Copenhagen, build in at least 90 minutes even though it's Schengen-to-Schengen, because SAS's regional gate for Billund often sits at the far end of the terminal, and Danish airport signage assumes local familiarity.
Summer remains the sweet spot for this itinerary — May through September brings both favorable award availability on the transatlantic legs and Denmark's best weather for exploring Jutland beyond the LEGO campus. Because this routing involves multiple carriers and connection points, fares fluctuate more than typical single-carrier itineraries, so setting up automated fare alerts across SAS, Lufthansa, and KLM will save you from overpaying on what's already a multi-leg journey.