Hi guys,
Thought I had better add this to the RB Discussion forum as it is relevant to it. It also appears in the Aviation section but just in case anyone has missed it. From the beginning of the winter schedules on the 25th October 2009, all Northwest flight numbers will be changed to Delta flight numbers. This applies to both domestic and international services. Not sure if it just means a change of prefix but suspect that it may be a complete change of the flight numbers as otherwise I would reckon there will be identical flight numbers on several schedules.
Ian