Hi all
My family is traveling (first time since COVID has happened), flying from Canada into the USA and then boarding a cruise in Miami. Cruise will be going to Mexico and surrounding areas.
Wondering if anyone has any information on the actual vaccine requirements to get into the US mainly.

Can't seem to find solid information for our family.

Myself and Wife are both 2nd doses but that's it. My daughter is 12 years old and has none and my 4 year old obviously has none.
Anyone able to either point me in the right direction or let me know info on this?

Based off cdc, you should be fine. Some people still wear masks to travel which they have every right to, so don't be alarmed if you feel like you should be as well.

Domestic flights there’s no requirement for vaccines or masks

According to this site it says over 18 I do, but children are good to go

https://www.cdc.gov/coronavirus/2019-ncov/travelers/international-travel-during-covid19.html

Yeah international is likely different, once you are in the states nobody is going to ask but customs probably will

The best source of information for your situation would be the airport IMO. They will be able to point you in the right direction and/or assist you with this matter.