*International flight arrivals will be up 11% on Monday over a similar day in October at Newark Liberty and John F. Kennedy international airports, with 253 flights scheduled to arrive, according to the Port Authority of New York & New Jersey

The Port Authority expects a gradual increase at those airports over the next two months, with international traffic reaching about 75% of November and December 2019 levels, based on current international schedules which are likely to change.
According to a CNN report

*A gradual recovery seems to be in the cards for international air travel. According to figures from aviation analytics company OAG, the number of filled seats arriving in the US from Europe this December is projected to be about 67% of the December 2019 level.

*Airlines are still bringing back employees and aircraft sidelined because of the pandemic. Staffing issues, which could be exacerbated by employee vaccine mandates, have complicated operations for some carriers.

*Customs and Border Protection (CBP) and the Transportation Security Administration have also been short staffed and face a looming deadline right before Thanksgiving for federally mandated employee vaccinations.

*Increased wait times are expected by CBP at busy land border crossings from Canada and Mexico. All this to say, preparation and patience will be key for international travelers heading into the US.

*There are mask mandates in Hawaii, Illinois, New Mexico, Nevada, Oregon and Washington. Washington, DC and Puerto Rico also require masks in indoor public spaces.

In some cities, including New York and San Francisco, there are vaccine requirements for indoor public spaces including restaurants.

Hawaii, which had some of the strictest entry requirements in the US, will now align with the new federal rules for international air travel. Although capacity restrictions in the state are easing, there are still some limits in place.

Children under 18 are exempt from the vaccination requirement. The CDC has the full slate of air travel requirements on its website.

Travelers must meet CDC criteria for being "fully vaccinated." Paper and digital documentation are acceptable. Airlines are responsible for gathering and verifying this information from air travelers.

More information on documentation is on the CDC's site.

https://www.cdc.gov/coronavirus/2019-ncov/travelers/international-travel/travel-assessment/foreign-vaccinated.html