Do I need a birth certificate to fly with daughters?

Hi! We are planning a trip and wondering if I will need to bring a birth certificate for my step daughters for them to fly with us?

I didn't see anything In the FAQ about traveling requirements regarding id/birth certificate.

Thank you so much!

Submitted April 28, 2021 at 08:28PM by spookyjellie https://ift.tt/3dXXs2K