
United States To Open Borders To Canada And Mexico, With Stipulations
This has been a long time coming, since March of 2020, but it will be open for non-essential travelers.
You will have to carry your vaccination card for proof of vaccination. Now, this is for drivers, rail travelers, and ferries. If you fly, you will have to carry proof of a negative COVID test and your vaccination card.
This is something both Mexico and Canada have pressed the United States for months. At this point, November is the month the US will drop its policies and put in place the new one. If you are traveling it is good to find out what the policy is to enter those countries and what you need to re-enter America.

According to Fox 9, the CDC says the U.S. will accept any travelers that have been vaccinated with the vaccines approved for emergency use by the World Health Organization, not just those in use in the U.S. That means that the AstraZeneca vaccine, widely used in Canada, will be on the list of accepted vaccines..
According to Fox 9, officials said the CDC was still working to finalize what rules to use for admitting those who received doses of two different vaccines in other countries, like in Canada.
Mexico has not put in place any COVID-19 entry procedures for travelers. Canada allows entry of fully-vaccinated individuals with proof of vaccination against COVID-19 as well as proof of a negative test conducted within 72 hours of entry to the country.
It looks like according to the rules for air travel it is very similar, negative test 72 hours previous to entry on the airplane and proof of vaccination.
Here is a great report that sums up everything if you are thinking of traveling.