So am I right assuming any of these routings would be permitted ?
OSL/xLHR/BDA/MIA/LAX/SAT/LAX/HNL/NRT/SIN/SYD/HBA/SYD/PER/DOH/LHR/OSL
OSL/LHR/BDA/MIA/LAX/SAT/LAX/HNL/NRT/SIN/SYD/HBA/SYD/PER/xDOH/LHR/OSL
OSL/LHR/BDA/MIA/LAX/SAT/LAX/HNL/NRT/SIN/SYD/HBA/SYD/PER/DOH/xLHR/OSL