whether … or …

We can use whether … or … as a double conjunction, with a similar meaning to It doesn’t matter whether … or …

• The ticket will cost the same, whether we buy it now or wait till later.

Present tenses are used to refer to the future.

• Whether we go by bus or train, it’ll take at least six hours.

Several structures are possible with whether … or not.

• Whether you like it or not, …
• Whether or not you like it, …
• Whether you like it or whether you don’t, …

note

For whether and if, (see here).