There's no nonstop path out of Savannah's compact terminal that gets you to Brussels without at least one connection, and that's the first thing to understand about booking business class from Savannah to Brussels: every itinerary routes through a major East Coast or Midwest hub before the transatlantic hop. Delta, American, and United all serve this corridor, and each carries its own personality once you're airborne. Delta typically routes SAV travelers through Atlanta or JFK, positioning you for Delta One suites with sliding doors on the transatlantic widebody equipment—a product that transformed long-haul comfort when it rolled out and remains one of the more consistent hard products in the sky. American funnels connections through Charlotte or Philadelphia, feeding into Flagship Business on their 777s and A330s, with lie-flat seats and Flagship Lounge access at the U.S. gateway if your layover allows. United tends to route via Newark or Washington Dulles, where Polaris seating and Polaris Lounges (Newark's is particularly good for a pre-departure meal) smooth the connection before the overnight run to Brussels.
Having flown this corridor repeatedly over the years, my instinct is always to favor the JFK or Newark connections over Atlanta or Charlotte when schedules allow—Northeast departures line up better with Brussels' morning arrival window, letting you clear customs and get to your hotel before the city fully wakes up, rather than fighting jet lag through a chaotic midday arrival. A lesser-known tip: Brussels Airport's arrivals hall moves fastest if you're seated toward the front of the business cabin, since passport control queues build quickly behind the first wave of wide-body arrivals from the US.
Seasonality matters enormously here. January, February, March, October, and November consistently offer the softest business class pricing on this route, as Belgium's convention and holiday travel calendars create lulls that airlines discount to fill premium cabins. Given how much fares shift week to week across three competing carriers and multiple hub options, setting up automated fare alerts is by far the smartest way to catch a premium-cabin deal before it disappears.