My wife and I collected Northwest miles in one account. Delta rolled the miles into my wifes name and now will not allow us to combine our miles even though it's the same Amex Account. We decided to go with Sky Miles since you get a free companion ticket just for signing up. First i booked a Frequent Flyer trip and entered the wrong date. I called Delta got no satisfaction, but was charged $100 for a typo. Then my wife tried booking a 'free' companion ticket just to find out that the fare jumps over $100 when you enter the code... read full review »