It is important to postpone travel until you are completely vaccinated because travel raises the risk of acquiring and transmitting COVID-19. If you are not completely vaccinated and must fly, obey the instructions for unvaccinated individuals traveling abroad or domestically.
Some people should refrain from traveling. People who are ill with COVID-19 symptoms, have recently tested positive for the virus that causes COVID-19, or have been exposed to someone with COVID-19 pose a very high risk to others while traveling. 
Case 1: Do you or your traveling partners have a headache, cough, or other COVID-19 symptoms?
Do not fly or cross borders if you have COVID-19 signs (even if you are fully vaccinated against COVID-19 or recovered from COVID-19 in the past). Stay at home and isolate yourself from others until it is safe to do so. If you need to fly for medical care, the most secure mode of transportation is an ambulance, air ambulance, or private vehicle.
If you test negative for COVID-19 but still ill, delay your trip until you feel better. If you have a fever, wait at least 24 hours after it has vanished without taking fever-reducing medicine.
Case 2: Have you or either of your traveling partners recently tested positive for COVID-19?
Even if you do not have symptoms, do not fly if you are infected with COVID-19. Stay at home and avoid contact with others. Postpone your trip until it is safe for you to leave your house.
When you’re with other people, wear a mask. If you have (or suspect) COVID-19, do not fly in commercial vehicles (bus, taxi, rideshare), trains, airlines, cars, or boats.
Case 3: Have you or any of your traveling partners had close contact with anyone who has COVID-19 in the last 14 days?
Do not fly if you are not fully vaccinated, and self-quarantine by isolating yourself from others. If you get ill, isolate yourself from others, get vaccinated for COVID-19, and delay your travel until it is safe.
Case 4: Are you or your traveling partners awaiting the results of a COVID-19 test?
A viral test determines whether or not you are currently infected. Do not fly until you have had the results of the tests. If you fly before receiving your results and your test is positive, you’ll need to distance yourself from others, even your travel partners, and delay your return until it’s safe to do so. Your traveling companions will be required to self-quarantine and delay their return trip. After you begin to self-isolate from them, their quarantine period will begin.
Public health authorities will impose restrictions on your travel if you or your travel companions intend to travel before it is safe.
