The airline begins flights to Maui on April 7. Eventually, it plans to serve four airports in Hawaii from Oakland, San Jose, Sacramento and San Diego.
Interisland service will begin April 28 between Honolulu and Kahului (Maui), and May 12 between Honolulu and Kona, now available for purchase through March 5 for as low as $29 one-way.
Southwest wanted to sell Hawaiian flights last year, but it took longer than expected to gain approval from the Federal Aviation Administration.