If you were to say that a brand-new Delta Air Lines Airbus A350-900 would not be operating any domestic flights, there would likely be few who would immediately question you. After all, the Airbus A350-900 is Delta’s flagship widebody aircraft, and its combination of long-range capabilities and high capacity makes it an ideal jet for serving routes between both long-haul and ultra-long-haul destinations. However, this particular model is not set to enter service on any domestic routes, not because it is not optimized for them, but because it is quite literally prohibited from doing so.