ilgarden is correct. we did the same thing 2007 using NW

it is about $100-$200 more expensive than direct "non discount" flight. since you stop in the third place most super discount price is not apply. There were no good price available at that time. The direct flight was about $1000 and we paid about $1200 for stay in Hawaii for 7 days. Most of time the flight from our place to China is about $800-900, but I was told that price was restricted for direct only.