Sea travel advice Travelling by sea whether on a short voyage on a small vessel or a lengthy trip on a large cruise ship can increase the risk of some medical conditions. All air passengers coming to the United States including US. 101 Best Travel Quotes In The World With Pictures The Planet D Do not board a cruise if you are sick if you know you have COVID-19 or if you were exposed to a person with COVID-19 in the past 14 days. Status Regarding Travelling . Effective January 26 the Centers of Disease Control and Prevention CDC will require all air passengers entering the United States including US. Airlines must confirm the negative test result or proof of. Links with this icon indicate that you are leaving the CDC website. The measure described in paragraph 4 1 - 4 will be implemented for the time being. Cancellation of travel must be done before the date of travel subject to a 5 fee or on the date of travel at a 10 fee. Traveling tends to magnify all human emotions.