I am planning a trip BKK-GIG in Sept next year. I notice that if I asked for a NW reward (econ) it will cost me 90K miles. But if I do BKK-HNL (40K) + HNL-GIG (35K), it will save me 15K miles. Since I will be booking for 4, the total saving will be an impresive 60K.

But what bug me is the ' No Back to Back Ticketing' rule which I am not familiar with. Am I doing a B-T-T by spliting my trip into 2 as suggested above? What if I stop for a couple of days in HNL in both direction. Will NW knows that. If yes, what is the consequence?