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COVID-19 Testing and Travel Requirements

COVID-19 and travel at SEA Airport More Information

Know Before You Go

Check if your destination requires quarantine or testing. Testing options are available for those who need it for other destinations or other requirements; Please do not travel if you have symptoms or feel ill.

Current Requirements

At this time, Washington state does not require COVID-19 testing for any inbound or outbound domestic travel. Please refer to the city, county, and state's information and guidelines for more specific quarantine and testing requirements. Quarantine requirements for travelers with some exemptions for negative COVID-19 tests prior to arrival.

Face Masks Required Regardless of Vaccination StatusTSA Mask Mandate

U.S. Federal Agencies and SEA Airport requires face masks at U.S. Airports:

Proof of Vaccination Required in King County

Effective October 25, 2021: Anyone over the age of 12 in King County requires proof of COVID-19 vaccine or a negative test at restaurants, bars, indoor recreational venues, and outdoor events with 500 people or more. Proof of vaccination or a negative test is not required within the airport unless required for your destination. Current mask guidance remains in effect, for more details please see

Vaccination Verification King County

Fully Vaccinated vs. Unvaccinated Requirements

Domestic Travel Requirements

The CDC recommends delaying travel until you are fully vaccinated due to the increased chance of getting and spreading COVID-19. All travelers should still follow CDC’s recommendations for traveling safely by wearing a mask over your nose and mouth, stay 6 feet from others and avoid crowds, and wash your hands often or use hand sanitizer.

  • Vaccinated Travel- Fully vaccinated travelers do not need to get tested before or after travel unless their destination requires it and do not need to self-quarantine for travel within the United States and U.S. territories.
  • Unvaccinated Travel - If you are not fully vaccinated and must travel, follow CDC’s recommendations:
    • Get tested with a viral test 3-5 days after travel and stay home and self-quarantine for a full 7 days after travel. Even if you test negative, stay home and self-quarantine for the full 7 days. If your test is positive, isolate yourself to protect others from getting infected. If you don’t get tested, stay home and self-quarantine for 10 days after travel.
    • Avoid being around people who are at increased risk for severe illness for 14 days, whether you get tested or not. Self-monitor for COVID-19 symptoms; isolate and get tested if you develop symptoms.

International Travel Requirements

Entry to the Country

With specific exceptions, noncitizens who have been in certain countries during the past 14 days may not enter the United States as immigrants. For more information, visit Travelers Prohibited from Entry to the United States. Please coordinate with the embassy for more information specific to your citizenship and other personal information and view the International COVID-19 Travel Regulations Map for specific information by country.

The Department of State advises all U.S. citizens to read the country-specific Travel Advisories and U.S. Embassy COVID-19 pages for updates on the impact of COVID-19 worldwide. For emergency assistance, contact the nearest U.S. Embassy or Consulate or call the following numbers: 1 (888) 407-4747 (toll-free in the United States and Canada) or 1 (202) 501-4444 from other countries or jurisdictions.

Testing and Vaccination Requirements for Traveling to the United States

Before Arriving to the United States

Effective Dec. 6 2021: Before boarding a flight to the United States, you are required to show a negative COVID-19 test result taken no more than 1 day before travel. Children under 2 years old do not need to test. There is also an option for people who have documented recovery from COVID-19 in the past 90 days. Learn more about these requirements.

After Arrival in the United States

You might have been exposed to COVID-19 on your travels. You might feel well and not have any symptoms, but you can still be infected and spread the virus to others. For this reason, CDC recommends the following:
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Recommended for All Travelers:

Recommended for not Fully Vaccinated Travelers:

In addition to the testing recommendations above: Stay home and self-quarantine for a full 7 days after travel, even if you test negative at 3-5 days. If you don’t get tested, stay home and self-quarantine for 10 days after travel

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