It used to, but today the majority of mail going to and from Hawaii is carried by plane.
to give a pit stop for the ships
Hawaii is a US State so the postal rates are the same.
3-5 days first class anywhere in the US.
Hawaii
first class mail is delivered in 3 to 5 days
They can go to Hawaii but not to dominican republic because its not a part of US.
2-3 days
First class mail is delivered in 3 to 5 days
Midway Atoll.
The Hawaiian Islands were important to U.S. naval and merchant ships because they stopped at Hawaii on their way to East Asia.
A landing in Hawaii was not a part of their plans. To support an invasion their ships would have to come close to Hawaii, within range of the coastal batterys which could damage and sing their ships. Also Hawaii had many US Marines and US army Soldiers stationed there. An attempted landing in which the Japenese military would have been out numbered.
The current postage rate for 1st Class mail is 44 cents to anywhere in the US, including Alaska and Hawaii.