Can I use one phone to display all my family’s mobile boarding passes?

No – each person must be able to display their own boarding pass independently, and each boarding pass must be sent to a separate email address or mobile phone number.

Members of your group with mobile devices can use mobile boarding passes, and those without devices can use eboarding passes.

Related questions

How do I use online check-in?
What is a mobile boarding pass and how do I use it?
When do I need to arrive at the airport if I check in online?