Since the start of the year, the prices on flights to Hawaii from the east coast have remained below average, but have risen a little with the notable exception of a big drop on flights from Boston to Kauai. Additionally, round-trip flights from Chicago have dropped slightly, as have prices on flights from Phoenix, Sacramento, and San Diego, among other cities.
The flights are from a variety of airlines, so look into the baggage and seat selection fees before buying. The upcharge on checking bags might make it more prudent to purchase tickets with a slightly higher sticker price.
Yes, fares have been low for a couple of weeks now, but they won't stay this way forever. It's worth getting on top of a good price while you can. Then you'll be drinking beer from Aloha Beer Co. and enjoying the beach before you know it.