You can axe your planned trip to Hawaii, which means to cancel or end suddenly.
For example, if you have too many activities or responsibilities to take care of, some of them, such as your vacation plans, may have to get the axe.
This is an informal metaphor, and not an expression you would use in a professional or formal statement.
You can scrub your plans, which means to cancel or postpone them. Also informal.
Call off means to cancel, and can be used both informally and formally.
In less delicate company, you can say your vacation plans had to be shitcanned for whatever reason. This might convey your great disappointment about the fact. Shitcan can also mean fire from a job. It can be use to mean disposing of something (that was expected to have some value).