Louis Armstrong International doesn't hand you a nonstop to the Rhineland, and after years of routing through this corridor, I've come to accept that the connection is where the real strategy lives. There is no nonstop business class from New Orleans to Cologne — every itinerary routes through a major hub, with Delta typically connecting via Atlanta or JFK onto Air France-KLM or Delta's own transatlantic metal, American funneling through Charlotte or Philadelphia to partner with British Airways or onward to Frankfurt, and United channeling travelers through Newark or Chicago before a Lufthansa-operated hop into CGN or a same-metal United run into Frankfurt with a short rail or connecting flight finishing the journey. Total elapsed time from wheels-up in Louisiana to touchdown on the Rhine typically runs 12-15 hours including connections, though the transatlantic leg itself clocks in around 8-9 hours depending on routing.
The seat you actually want depends on which hub you're funneled through. If your itinerary lands you on a United-Lufthansa combination via Newark or Chicago, angle for Lufthansa's long-haul aircraft with the newer Allegris business suites now rolling out on select 787 and 747-8 routes — request it specifically when booking, since older configurations still fly plenty of Frankfurt rotations. Delta loyalists connecting through JFK should chase Delta One Suites on the A330-900neo or A350, both of which offer full privacy doors and consistently rank among the better hard products on this side of the Atlantic. American's routing through London or Philadelphia often means a leg on British Airways' Club Suite, which, while dated in cabin ambiance, still delivers direct aisle access and reliable service standards.
My insider tip: build in a two-hour minimum connection window in Frankfurt or Munich rather than the standard 90 minutes airlines will sell you, since German immigration queues after intra-Schengen arrivals from the US side can bottleneck unpredictably in summer. January through March and October into November remain the sweet spot for award availability and softer fares, as German trade fair season and summer leisure crowds thin out considerably. Given how much these connecting itineraries fluctuate week to week, setting up fare alerts for this specific New Orleans–Cologne corridor is the smartest move you can make before booking.