Boise doesn't hand you a nonstop to Scandinavia, so the real skill in booking business class from Boise to Copenhagen lies in choosing the right connection—and after two decades of routing through nearly every gateway in the country, I can tell you Delta via Minneapolis or Amsterdam, and United via Chicago or Newark, are the two smartest plays. Delta's Amsterdam hub is particularly elegant: you connect onto a KLM-operated or Delta-metal widebody, often a 767 or A330 with Delta One suites featuring all-aisle access and a proper door, before the short KLM/Delta hop into CPH. United routes you through Newark or Chicago onto its Polaris cabin, with lie-flat seats and Saks Fifth Avenue-designed bedding that make the long transatlantic leg genuinely restful. American, meanwhile, typically funnels Boise traffic through Chicago or Dallas onto its Flagship Suite-equipped 777s or 787s, connecting via London or occasionally direct European gateways with a same-day continuation into Copenhagen.
The total journey clocks in around 10.5 hours of actual flight time once you're airborne on the long-haul segment, though total travel time from BOI including connections often runs 14-17 hours depending on layover length—worth padding your itinerary with at least 90 minutes at Minneapolis or Chicago, both of which can be chaotic during peak summer departure banks. My insider tip: book the earliest possible BOI departure, typically the 6am flight, which lands you at your connecting hub with enough buffer to use the Delta Sky Club or United Polaris Lounge for a proper shower and meal before the long transatlantic leg—arriving into CPH refreshed rather than depleted matters enormously on a route with this many moving parts.
May through September remains the sweet spot for this itinerary, coinciding with Scandinavia's best weather and Delta's seasonal Amsterdam frequency increases. Given how much award and revenue pricing fluctuates across three carriers and multiple routings, setting up fare alerts specific to this Boise-Copenhagen corridor is the smartest move before you commit to dates.
