Bordeaux rewards patience, and so does the routing that gets you there in comfort. There's no nonstop from Newark, so business class from Newark to Bordeaux always involves a connection—typically through Paris CDG on Air France, Frankfurt or Munich on Lufthansa, or London Heathrow on British Airways. Of the three, Air France offers the most seamless experience, with a same-alliance domestic hop from CDG to Bordeaux that often uses the same terminal (Terminal 2E/2F) as the transatlantic arrival, minimizing the connection headache. Air France's long-haul business class on the Newark run features their newer reverse herringbone seats on the Boeing 777-300ER, a marked improvement over the older cabin still found on some Lufthansa A340s. British Airways routes through Heathrow's Terminal 5, where their Club Suite—complete with a sliding door—makes the layover more tolerable even if it adds transatlantic-plus-short-hop fatigue.
My strong recommendation after years flying this corridor: choose Lufthansa only if your itinerary lands you on one of their Allegris-equipped aircraft, since the older business product on legacy 747-8s and some A340s feels dated next to AF and BA's current offerings. If Air France is your carrier, try to book the CDG-BOD connection with at least 90 minutes of buffer—Terminal 2F to the connecting gates for domestic French flights can involve a bus transfer that eats time unexpectedly. Wine harvest season (September) brings premium demand and fuller cabins, so if flexibility allows, target the shoulder months.
The sweet spot for value on this route consistently falls in January, February, March, October, and November, when leisure demand to Bordeaux's wine country dips and corporate travel to Paris hubs softens fares across all three carriers. Given the routing complexity and multiple competing itineraries, setting up automated fare alerts is the smartest way to catch a business class fare drop the moment it appears, rather than manually checking three different airline networks.