Salzburg's compact airport, with its single small runway hugging the mountains, cannot accommodate widebody aircraft, which is why nobody flies nonstop from Baltimore — and why the routing you choose matters more than usual. Business class from Baltimore to Salzburg invariably means connecting through Frankfurt, Munich, or Vienna, and after dozens of trips on this corridor, I can say the Vienna routing via Austrian Airlines is the most rewarding for those willing to accept a longer overall journey in exchange for a genuinely comfortable final approach into the Alps. Delta operates the transatlantic long-haul leg out of BWI, typically to Amsterdam or via a codeshare partner into Frankfurt, and their Delta One suites with sliding doors on the A330-900 or A350 make the nine-hour transatlantic stretch feel shorter than it is. From Frankfurt or Munich, Lufthansa's short intra-European business class — often just an economy seat with a blocked middle — gets you the rest of the way, so don't expect lie-flat comfort on that final hop.
The real craft in booking this route lies in the connection strategy. If your itinerary routes through Munich, arrive with at least 90 minutes' buffer, since Terminal 2 passport control can bottleneck badly during the 7-9am wave of transatlantic arrivals; Frankfurt's Terminal 1 is larger but better signed for connecting business passengers heading to regional gates. My insider tip: book the Vienna connection whenever schedules allow, because Austrian's Vienna hub lounge (the Senator Lounge) offers a genuinely restorative stopover, and the subsequent 45-minute hop to Salzburg on an Austrian regional jet is far less turbulent-prone than the Munich Alps approach, particularly in winter.
Seasonality matters enormously here — January, February, March, October, and November consistently offer the softest business class fares, as Salzburg's ski crowds haven't yet descended and the Sound of Music summer tourist surge has faded. Given how volatile pricing gets across three carriers and multiple routings, setting up automated fare alerts is the smartest way to catch a fare dip before it disappears.