Cincinnati offers no nonstop path to Iceland, which means the journey to Reykjavík's Keflavík Airport begins with a domestic hop before the transatlantic leg begins in earnest — a factual reality that shapes every decision serious travelers make about business class from Cincinnati to Reykjavík. The most efficient routing pairs Delta through its Atlanta or JFK hub, connecting onto Delta One's lie-flat suites with direct aisle access on the A330-900 or A350, while United funnels passengers through Newark or Chicago O'Hare into Polaris seating, also fully lie-flat with direct aisle access on widebody equipment. Icelandair, meanwhile, requires routing through a US gateway city like Boston, JFK, or Washington Dulles, where its Saga Class cabin — typically configured in a 2-2 layout on the 767 fleet, offering recline-style seating rather than full lie-flat on shorter transatlantic hops — delivers a more intimate, Nordic-minimalist experience with genuinely excellent service and Icelandic design sensibility.
Having flown all three configurations on this connection pattern repeatedly, my strong preference leans toward routing through Boston when Icelandair is in play, since BOS offers generous connection windows and a Saga Class lounge experience that outperforms rushed layovers elsewhere; if booking Delta or United, JFK's connection banks tend to align better with CVG's morning departure schedule than Atlanta's midday crunch. An insider tip few mention: Icelandair's Saga Class fares often price more favorably when booked as a through-itinerary from CVG rather than searching BOS-KEF separately, because the carrier's revenue management treats the full journey as a single premium product — always price both ways before committing.
Summer remains the sweet spot for this itinerary, not just for Iceland's endless daylight and puffin season, but because May through September sees the heaviest capacity and competitive positioning among all three carriers, which historically softens premium cabin fares despite peak tourist demand. Given how quickly award space and discounted business fares shift on this connecting route, setting up automated fare alerts is the smartest way to catch the pricing windows before they close.
