Honeymoon & name changing question

I was just about to book honeymoon flights when I realized I don’t know if I should use my maiden or new last name. And then realized when I get my passport, am I able to get it now with my new last name even though I don’t get married until May? We’re leaving on our honeymoon in July so I know I’ll definitely have time to change my license but not a passport so I wanted to do that this week. Anyone know how that works?

Edit: thanks for the advice everyone! Will definitely just be waiting until after the honeymoon to make any changes.