https://consumerist.com/2017/10/12/southwest-airlines-plans-to-start-flying-to-hawaii-eventually/

Southwest Airlines put on its best floral shirt to announce that the (sometimes) lower-cost carrier intends to start offering service to Hawaii. But when those flights to the far-flung island state will begin remains a question.

In its big announcement of the Hawaii news, Southwest would only say that it intends to start selling tickets for travel to Hawaii at some point in 2018.