Can I use an ID card for flights?
You'll need to have a verified form of identification on both domestic and international flights, regardless of the length or details of your journey.
On International flights, all passengers must have a valid passport, and if required, a valid visa for the country they will be staying in.
You can find out more about passports and their requirements in different countries here, along with different questions for different countries.
On domestic flights, you do not necessarily need a passport, but you will still need some form of government-issued and/or approved ID. For ease, some passengers choose to use their passport as it is a valid form of ID, whereas some will use another form of photo ID.