✔ 最佳答案
I assume you mean Reno, NV.
The best way will be:
1. Hong Kong - San Francisco
2. San Francisco - Reno (Ground Transporation preferred. Air will be extremely expensive)
3. Reno - San Francisco (Ground Transporation preferred. Air will be extremely expensive)
4. San Francisco - Chicago O'Hare (ORD) / Midway (MDW)
5. Chicago O'Hare - Hong Kong
In most of the case, United will be your only choice.
Try to avoid flying in or out Reno will definitely keep your cost low (and possible time-saving), as it may cost about 33% of your entire ticket price.
Also, make sure you book all the flight in a single reservation because domestic flights charge checked-in luggage. Same reservation may help you to avoid extra fees.