Figure out what documentation you need for your chosen destination:
If you need a visa, purchase one here:
Don't go any further in your booking process until you have taken the time to go look at your passport to make sure it hasn't expired! Play it safe and make sure your passport is valid for 6 months beyond your date of return. Example: if you plan to travel from March 14-March 24 2020, please make sure your passport is valid until at least September 25, 2020.