when going to the airport if your kid has a different address than what's on their birth certificate will it matter to board plane

Usually no — a different address on a child’s birth certificate does not normally stop them from boarding a plane. What matters most is that the child has the required travel documents, and airlines and border officers are generally more focused on identity, parental relationship, and consent issues than on matching addresses.

What airlines usually check

For a child traveling, the key documents are typically:

• A valid passport or other required travel document for the trip.

• Proof of relationship if the child has a different surname or there could be confusion, such as a birth certificate.

• Consent from the other parent or guardian when a child is traveling with only one parent, depending on the country and situation.

When address differences matter

A different address on the birth certificate is usually not the issue by itself. Problems are more likely if:

• The child is traveling internationally and the adults cannot show they are the parent or have permission.

• The airline or border officer asks for proof of guardianship or consent and you do not have it.

• The child’s surname is different and you have no document connecting the child to the accompanying adult.

What to bring

To avoid delays, carry:

• The child’s passport or required ID.
• The birth certificate.
• Any custody or guardianship paperwork if relevant.
• A notarized consent letter from the other parent if the child is traveling with only one parent and your route or destination may require it.

Practical answer

If the question is just about the address on the birth certificate, that alone usually should not prevent boarding. The bigger concern is whether the child’s identity and your authority to travel with them can be verified if asked.

If you want, I can also give you a country-specific checklist for domestic or international travel.