Hawaii is the most southern state in the US as of now, but before then several other states were once Queen of the South. Before Hawaii, Florida was Queen; before Florida, Louisiana was Queen; before Louisiana, Georgia was Queen; before Georgia, Delaware was the original Southern Queen of the South.
There is no Hawaiian flag because Hawaii is the reining Queen of the South, so that flag flies clean without the numbers and letter. You can see it here. The same flag see there is also appropriate for Pele Point in Canada.