Columbus doesn't offer a nonstop path to Luxembourg's Findel Airport, so every itinerary in business class from Columbus to Luxembourg routes through a major hub, and after dozens of trips on this corridor, I've settled on Detroit-Amsterdam-Luxembourg via Delta and KLM's joint venture, or Columbus-Frankfurt-Luxembourg on Lufthansa, as the two most reliable builds. Delta's Delta One suites on the transatlantic widebody legs, with sliding privacy doors, are the standout hard product here, while Lufthansa mixes its long-haul metal (increasingly featuring the new Allegris cabin on select aircraft) with a short Frankfurt-Luxembourg hop typically flown as a regional business-class configuration through Lufthansa's own or Luxair-coordinated services. Factually speaking, no carrier flies Columbus to Luxembourg nonstop; all itineraries require one connection, most commonly through Detroit, Amsterdam, or Frankfurt.
My personal preference leans toward routing via Frankfurt on Lufthansa rather than Amsterdam, simply because Frankfurt's short-haul gates for Luxembourg departures are close to the long-haul arrival concourse, making tight connections far more manageable after an overnight flight — something seasoned flyers rarely mention because it requires having actually run that connection with jet lag and a rolling bag. If Delta is your carrier, Detroit's Delta Sky Club before departure is worth the extra layover time, since Luxembourg-bound evening connections tend to be lightly booked and quiet. Seasonally, this route sees its softest business-class fares in January, February, March, October, and November, when Luxembourg's financial-sector travelers (its bread-and-butter demand) taper off between conference seasons — book those shoulder months for the best combination of availability and value.
Luxembourg itself rewards the effort: Findel is a small, efficient airport, and business-class arrival means clearing immigration and collecting bags before many economy passengers have deplaned. Given how fare volatility on this itinerary can shift week to week depending on which hub carrier is running a sale, I'd recommend setting up automated fare tracking so you're alerted the moment premium-cabin pricing dips on your preferred connection.
