The first NRT-ROR flight is 10/29, meaning those flying from the US and connecting at NRT, the first day you can book it is 10/28. The twice weekly flight operates NRT-ROR, which gets in late in the evening before midnight, on Wednesdays and Saturdays, remains overnight, and returns to NRT on Thursdays and Sundays, leaving at a reasonable time late morning, which Delta's previous ROR-NRT flight did not.