Before if the package was under 1 pound it would go via air. USPS is making changes that are going to slow packages to Hawaii, especially smaller Ground Advantage Packages
>Beginning October 1, USPS is updating service expectations for Ground Advantage and Priority Mail packages shipped to and from certain noncontiguous U.S. states and territories.
>Packages between the contiguous U.S. and affected locations will have an expected delivery time of 10 days or more. Some routes may take significantly longer.
>Ground Advantage packages under 1 lb will now primarily travel by surface transportation (same as packages over 1 lb).
On top of that the 3 day Priority Mail time is moving to 4 days.
>Priority Mail shipments to or from Alaska, Hawaii, American Samoa, Puerto Rico, and the U.S. Virgin Islands will have a 2–4 day service expectation.