Can I use NW miles for delta flights? I have almost enough NW miles for this trip and haven't been too many places. We really want to keep it to the easier to get at airports and ones that are easier to get with frequent flyer miles. What happens if I book this entire trip using my ff miles, then a month before I fly, they cancel one of the flights. How will I get another flight using the frequent flyer miles. When you fly the around the world using NW miles, do you have to only fly the flights that have a frequent flyer ticket available?
thanks, Darwin