This month, foreign nationals can visit the United States if they are fully vaccinated. All passengers entering the US are required to show negative results of a Covid test – this includes children, age 2 and up.

Read CDC requirements and recommendations for international travel. Find out what is required to board a flight to the United States, both US citizens and non-citizens.

Fully vaccinated Americans (12 and up) returning to the United States from a trip abroad must have a negative Covid test, taken three days before getting on flight. Unvaccinated Americans must have a negative Covid test administered within 24 hours, this applies to children too.

Tips for Fall 2021:

What is required is highly variable. Some museums require masks and timed ticket entry to maintain safe crowds. Others do not. Before visiting, read guidelines for each attraction.

In San Francisco, Cal Academy of Sciences require proof of vaccination or a recent covid test for entrance to the museum. Same requirement applies for Universal Studios Hollywood.

This winter, there may be Covid surges, highly variable by location. Tip: Before planning your trip, check the vaccination and case rates for your destination.

During your trip, check the weather for your destination. In 2021, there have been extreme weather events, such as extreme heat and flooding.

In California, thanks to an "atmospheric river" rainstorm, there is snow in the Sierra (skiing at Lake Tahoe), and risk of fire danger is significantly reduced.

Also on Travel for Kids Twitter and Facebook find new posts with travel tips every week.

And, read our blog post, comfort and imagination anywhere in the world:

Nov. 1, 2021