You can get to HNL on NWA via Lax, Sea, Msp and PDX. As stated by others, it is always best to try to non-rev on your own airline because you will be higher on the non-rev list. Traveling with an infant can be tough so you may have to fly to Sea or PDX and stay over-night then catch your flight the next day. Getting out via LAX will be tough (extremely busy airport) if I were you, I would try the smaller airports such as PDX.

August is a high travel month, I have had many co-workers stranded in HNL for days at a time trying to get home.

Good Luck
Paula