Four carriers cover this Charlotte to Podgorica business class corridor well, each routing through a different hub. American's Flagship Business gets you a proper lie-flat suite in 1-2-1 configuration, Flagship Lounge access at the connecting gateway, and Casper bedding for the long overnight leg. British Airways runs its Club Suite product with a closing door, also 1-2-1, and pairs it with White Company linens — a favorite among travelers who want privacy without paying for first class. Lufthansa's newer Allegris Business suites, flying on the A350, bring a level of seat privacy and German-engineered comfort that's earned strong reviews since rollout. Delta One Suites, meanwhile, offer their own closing door and Tumi amenity kits, and Delta's SkyMiles program makes upgrades and mileage runs easier for US-based flyers already in that ecosystem. All four are legitimate choices for Charlotte to Podgorica business class travel; the right pick usually comes down to which connection city fits your itinerary and which loyalty program you're already invested in.