A form of photo ID

You should always travel with a national photo ID. In some cases, you’ll need a passport, while in others an ID such as a driver’s license might be enough. During online check-in, airlines ask for the number on your identification document and its expiration date.

Make sure to check which type of document you’ll need and whether the countries you’re traveling to have any conditions — for example, some countries only accept passports that are valid for at least 6 months after your trip.