Vietnam Airlines Introduces New US Travel Rules from 4 November as CDC Restrictions Bring Mandatory Health Declarations and Boarding Changes

Vietnam Airlines has introduced new travel documentation and boarding requirements for passengers travelling to the United States, following updated public health measures issued by the US Centers for Disease Control and Prevention (CDC). The airline announced implementation from noon Vietnam time on 4 November 2026, requiring passengers to declare whether they had visited the Democratic Republic of the Congo during the preceding 21 days. The wider US restrictions also affect travellers with recent travel histories involving Uganda or South Sudan. Depending on nationality and travel history, passengers may face denied boarding, temporary entry restrictions or mandatory health screening at designated US airports.

The changes are particularly important for international passengers travelling through Vietnam to the United States, including those whose earlier journeys involved African destinations covered by the CDC measures.

The requirements apply to relevant travel history, not simply the country where a passenger begins the final flight.

A traveller departing from Hanoi or Ho Chi Minh City may therefore be affected even if their visit to the Democratic Republic of the Congo, Uganda or South Sudan occurred earlier in a multi-country itinerary.

The CDC states that the measures are intended to reduce the risk of Ebola being introduced into the United States. It also describes the overall risk to the American public and travellers as low. CDC

Vietnam Airlines US Travel Requirements Introduce Mandatory Health Declarations

The central change concerns a mandatory declaration for passengers boarding international flights to the United States.

Under the CDC’s order, all covered passengers must sign an attestation confirming that they have not been physically present in the Democratic Republic of the Congo, commonly abbreviated as DRC, during the 21 days before boarding.

An attestation is a formal statement confirming that the information provided is true.

The CDC issued the order on 22 October 2026 and subsequently updated its guidance on 3 November.

The federal requirement took effect after 11.59 pm US Eastern Standard Time on 3 November 2026.

Vietnam Airlines announced its implementation from noon Vietnam time on 4 November, according to the supplied airline report. The two times reflect different time zones.

The requirement applies to passengers travelling to the United States from international departure points, including those connecting through the country.

It is not restricted to passengers departing from Vietnam.

The CDC confirms that US citizens, US nationals and lawful permanent residents are included in the declaration requirement. CDC

For Vietnam Airlines passengers, the immediate practical implication is that completing the relevant health declaration becomes part of the international departure process.

Passengers who cannot provide the required declaration may be refused boarding.

The CDC also permits the attestation to be completed in paper or digital form, subject to the airline’s collection arrangements.

Which Countries Are Covered by the New US Travel Restrictions?

The US measures distinguish between three African countries: the Democratic Republic of the Congo, Uganda and South Sudan.

Although all three are relevant to the current public health travel arrangements, the restrictions are not identical.

The most stringent air-boarding restriction applies to people who have recently been in the Democratic Republic of the Congo.

Separate entry restrictions apply to certain travellers who have visited Uganda or South Sudan.

US Travel Restrictions by Country and Traveller Status

Source: CDC guidance updated 30 October and 3 November 2026. Exceptional authorisations may be available in narrowly defined circumstances.

The distinction between nationality categories is particularly important.

A US Green Card holder is not automatically treated the same as a US citizen under the Uganda and South Sudan restrictions.

The CDC explicitly includes lawful permanent residents among those subject to the temporary entry restrictions after recent presence in those two countries. CDC

Democratic Republic of the Congo Travel History Triggers the Strictest Boarding Restriction

Travellers who have been physically present in the Democratic Republic of the Congo within the preceding 21 days generally cannot board an international flight destined for the United States.

This restriction includes US citizens and US nationals.

The measure applies even when the traveller holds a valid US passport, visa or other immigration document.

It is based on recent travel history rather than the person’s nationality alone.

The CDC advises affected travellers to remain outside the United States for at least 21 days after leaving the DRC.

The waiting period is calculated using calendar days.

The day a person leaves the DRC is considered Day 0. The first full calendar day outside the country is Day 1.

Under the CDC’s published calculation, a person may board a flight to the United States beginning on Day 22, provided all other travel requirements are satisfied. CDC

How the 21-Day Waiting Period Works

This means travellers should not simply count 21 days from the time their aircraft departed the DRC.

They must follow the CDC’s calendar-day calculation.

The restriction also applies to passengers who passed through the country during a connecting journey.

Travellers should therefore review their complete itinerary, including transit stops, before making plans to enter the United States.

Uganda and South Sudan Restrictions Depend on Nationality and Immigration Status

The rules for Uganda and South Sudan differ from those concerning the DRC.

The CDC states that non-US citizens and non-US nationals who have been physically present in Uganda or South Sudan during the preceding 21 days are subject to temporary US entry restrictions.

This includes US lawful permanent residents, commonly known as Green Card holders.

Affected travellers should remain outside the United States until the applicable waiting period has passed.

However, US citizens and US nationals who have visited Uganda or South Sudan, but not the DRC, may enter the United States through designated airports equipped to conduct public health screening.

This distinction is important for passengers planning multi-country journeys.

For example, a US citizen who recently visited Uganda may be eligible to return through an approved screening airport.

A Green Card holder with the same travel history may remain subject to the temporary entry restriction.

The CDC’s guidance explicitly identifies this difference. CDC

Travellers should also recognise that the restrictions concern recent physical presence.

A person does not need to have stayed overnight in Uganda or South Sudan for the relevant travel history to count.

Even a connecting flight through an airport in either country can trigger the applicable requirements.

US Citizens Returning from Uganda or South Sudan Must Use Three Designated Airports

The CDC has designated three US airports for the arrival of eligible US citizens and nationals who have recently visited Uganda or South Sudan.

These airports have arrangements for enhanced public health entry screening.

Designated US Entry Airports

The requirement applies to eligible US citizens and nationals whose recent travel history includes Uganda or South Sudan but not the DRC.

The CDC states that affected travellers must enter through one of these airports for screening. CDC

The designated airports are not interchangeable with other major international gateways.

A passenger cannot assume that arrival through Los Angeles, San Francisco or another US airport will satisfy the specific screening requirement.

The approved arrival point must be considered when planning the journey.

For travellers who have already booked flights to a different airport, this may require changes to their itinerary.

Airlines may need to assist affected passengers with alternative arrangements, depending on their ticket conditions and available services.

However, the availability of an alternative itinerary should not be assumed.

Passengers should contact their airline before departure to determine whether a compliant journey is possible.

Why Vietnam Airlines Cannot Carry Certain Passengers to San Francisco

Vietnam Airlines’ announcement identifies a specific operational issue involving its US services.

The airline stated that it does not operate flights to Washington Dulles, Atlanta or New York JFK, the three designated screening airports.

Its US-bound operation referenced in the announcement serves San Francisco International Airport.

San Francisco is not one of the three designated arrival airports for the relevant CDC screening arrangements.

As a result, Vietnam Airlines said it would not accept passengers for carriage to San Francisco if they had recently visited Uganda or South Sudan and were subject to the requirement to arrive through a designated screening airport.

This includes US citizens and nationals who would otherwise be eligible to enter the United States through an approved airport.

The distinction is important.

These passengers are not necessarily prohibited from returning to the United States altogether.

Rather, their permitted entry route is restricted.

A US citizen who recently visited Uganda may be able to enter through Washington Dulles, Atlanta or JFK, but the Vietnam Airlines service described in the announcement does not provide an eligible arrival point.

Travellers in this situation must make alternative arrangements consistent with the CDC requirements.

For non-US citizens and non-US nationals, including Green Card holders, the temporary entry restriction remains a separate issue.

Booking a flight to a designated screening airport does not automatically remove that restriction.

Airport Transit Through the Three Countries Also Counts as Recent Travel

One of the most consequential features of the US requirements concerns airport connections.

The CDC explicitly states that recent physical presence includes travel through the affected countries, even when passengers remain inside an airport.

The rule also covers travellers who stay aboard an aircraft during a transit stop.

This means a passenger does not necessarily need to pass through immigration control or enter the country as a tourist for the restriction to apply.

For example, a traveller flying through the Democratic Republic of the Congo on a connecting itinerary may be considered to have been present in the country even if they did not leave the airport.

The same principle applies to Uganda and South Sudan under their respective restrictions.

The CDC’s guidance specifically identifies these transit situations. CDC

Travel Situations That May Trigger the Restrictions

• A holiday or business visit involving an affected country.
• A connecting flight through an airport in the DRC.
• A transit stop in Uganda or South Sudan.
• Remaining aboard an aircraft during a stop in one of the three countries.
• A multi-country journey that included an affected country within the preceding 21 days.

This is particularly relevant for travellers using complex international itineraries.

Passengers should review every flight segment rather than considering only their main holiday destination.

They should also avoid assuming that a short transit has no immigration or public health consequences.

Why the United States Introduced the New Ebola-Related Travel Measures

The CDC introduced the restrictions as part of its response to Ebola-related public health concerns involving the affected countries.

Ebola disease is a serious viral illness.

The CDC’s October 2026 order refers to the risk associated with an outbreak involving the Bundibugyo virus strain.

The US authorities have implemented temporary travel restrictions and enhanced screening measures intended to reduce the possibility of Ebola being introduced through international travel.

The measures focus on recent presence in specified countries because of the potential interval between exposure to the virus and the development of symptoms.

The CDC identifies 21 days as the maximum incubation period used for these travel requirements.

This explains why the rules use a 21-day travel-history window rather than relying only on symptoms at departure.

A person may feel well when travelling but still be within the relevant period following a potential exposure.

However, travelling through one of the affected countries does not mean that a person has Ebola.

The restrictions are precautionary public health measures.

The CDC also states that the overall risk to the American public and travellers remains low. CDC

This distinction is essential when reporting the policy.

The requirements should not be presented as evidence that every traveller from the affected countries is infected or poses a confirmed health risk.

What Happens During Enhanced Health Screening at US Airports?

Eligible US citizens and nationals arriving from Uganda or South Sudan within the relevant 21-day period must undergo public health screening at a designated airport.

The CDC has published information explaining the process.

Travellers are directed to a screening area after arrival.

They may be asked to provide information about their travel history, recent activities and any symptoms.

Their temperature is checked, and CDC personnel assess whether further public health evaluation is required.

The agency may also collect contact information for follow-up.

Main Stages of CDC Entry Screening

The CDC states that eligible travellers without symptoms will generally be able to continue to their destinations after completing screening.

Those requiring further assessment may be referred for additional evaluation.

If Ebola is suspected, the traveller may be transferred to a medical facility for further assessment, isolation and care.

The agency also uses automated messages to remind relevant travellers to monitor their health during the applicable 21-day period. CDC

Screening should not be confused with a requirement that every eligible passenger undergo hospital treatment.

The process is intended to identify potential public health concerns and determine whether further action is necessary.

The New Declaration Applies to US-Bound International Flights Beyond Vietnam

Although the announcement was issued by Vietnam Airlines, the underlying CDC attestation requirement is broader.

The federal order applies to covered passengers boarding international flights to the United States from foreign countries.

It also includes passengers travelling on international services that connect through the United States.

This means the declaration requirement is not exclusive to Vietnamese airports or Vietnam Airlines.

Travellers departing from other countries may encounter the same federal requirement through their respective airlines.

The CDC’s order requires airlines and other aircraft operators to confirm that covered passengers have completed and signed the attestation before boarding.

Operators must also retain the completed declarations for at least 42 days after the relevant flight departs for the United States.

The order permits paper or digital attestations. CDC

For passengers, this means the form is part of the official boarding process rather than an optional airline questionnaire.

The requirement also applies regardless of whether a traveller has previously visited Africa.

Passengers who have not visited the DRC must still provide the required confirmation.

The purpose is to establish the relevant travel history consistently across international arrivals.

Parents and Guardians Must Complete Declarations for Eligible Dependants

Vietnam Airlines’ announcement explains that each passenger must have a separate declaration.

Parents or legal guardians must complete the form on behalf of children or individuals who cannot complete it themselves.

This is relevant for families travelling together.

A single declaration covering an entire family should not be assumed sufficient.

Each passenger’s recent travel history must be accurately represented.

For example, family members may have different travel histories if they joined the journey from different locations.

The information provided must reflect the individual traveller’s circumstances.

The CDC also warns that deliberately providing false or misleading information may have legal consequences under US federal law.

Passengers should therefore treat the declaration as a formal statement rather than a routine administrative form.

If there is uncertainty about whether a transit stop counts as presence in an affected country, travellers should seek clarification before signing.

Does the Requirement Affect Vietnamese Citizens Travelling to the United States?

Yes. Vietnamese citizens travelling to the United States are subject to the applicable CDC requirements.

The attestation requirement is based on boarding an international flight to the United States, not solely on nationality.

A Vietnamese passport holder who has not been in the DRC during the preceding 21 days must still complete the declaration.

If that passenger has recently visited the DRC, the general boarding restriction applies.

If the traveller has visited Uganda or South Sudan during the relevant period, the restrictions applicable to non-US citizens and non-US nationals must be considered.

A valid US visa does not automatically override these public health measures.

The same principle applies to other foreign nationals travelling from Vietnam.

However, the announcement does not establish any general suspension of flights between Vietnam and the United States.

It introduces requirements affecting passenger eligibility and documentation.

Travellers whose recent travel history does not involve the restricted countries may continue to travel subject to ordinary entry requirements and the mandatory attestation.

How Long Will the US Travel Restrictions Remain in Effect?

The CDC’s attestation order includes a defined review and expiry framework.

The signed order states that the attestation requirement remains effective until it is rescinded or modified, or until 18 December 2026, whichever occurs first.

The order may be amended or extended following an assessment of the public health situation.

Relevant considerations include outbreak case numbers, geographical spread, community transmission and containment capacity. CDC

This date applies to the attestation order and should not automatically be interpreted as the expiry

Why This Matters

The new Vietnam Airlines requirements are significant because they demonstrate how public health measures can affect international air travel even when passengers hold valid travel documents.

The restrictions apply according to recent travel history, which means a short transit through an affected country can influence eligibility to board a later flight.

For international tourists, the rules make it necessary to review earlier travel segments rather than concentrating only on the final departure and arrival airports.

For business travellers, they may require changes to itineraries involving several countries.

For US citizens and nationals returning from Uganda or South Sudan, the designated-airport requirement can determine which airline services are suitable.

For airlines, the measures introduce additional responsibilities involving declarations, boarding checks and record retention.

The CDC’s published order also establishes a scheduled expiry date of 18 December 2026, subject to earlier amendment or cancellation.

Travellers planning December journeys should therefore monitor official updates rather than assume that the current rules will remain unchanged indefinitely.

What Travellers Should Know

Passengers travelling from Vietnam or another international departure point to the United States should review their recent travel history before arriving at the airport.

The most important questions concern whether they have been physically present in the DRC, Uganda or South Sudan during the preceding 21 days, whether their nationality affects entry eligibility and whether their planned US arrival airport is permitted.

Before Booking or Travelling

• Review your complete travel history: Include holidays, business visits and airport transit stops during the preceding 21 days.
• Complete the required declaration: The DRC attestation applies broadly to international air travellers bound for the United States.
• Check your nationality category: US citizens, US nationals and Green Card holders may face different rules.
• Verify the arrival airport: Eligible US citizens and nationals returning from Uganda or South Sudan must use a designated screening airport.
• Calculate waiting periods carefully: Follow the CDC’s calendar-day calculation.
• Prepare ordinary travel documents: Passports, visas and other applicable immigration requirements remain in force.
• Contact the airline before departure: Confirm boarding eligibility if recent travel involved an affected country.
• Monitor official changes: The restrictions may be amended, extended or rescinded by US authorities.

Vietnam Airlines provides passenger assistance through its hotline 1900 1100, official Facebook and Zalo channels, ticket offices and authorised agents, according to its 4 November announcement. Vietnam+ (VietnamPlus)

Frequently Asked Questions

1. When did Vietnam Airlines introduce the new US travel requirements?

Vietnam Airlines announced implementation from noon Vietnam time on 4 November 2026. The underlying CDC attestation order took effect at 11.59 pm Eastern Standard Time on 3 November.

2. Must every passenger travelling to the United States complete the declaration?

Yes. The CDC requires covered passengers and crew members boarding international flights to the United States to confirm that they have not been present in the Democratic Republic of the Congo during the preceding 21 days, unless an authorised exemption applies.

3. Can US citizens fly to America after recently visiting the DRC?

Under the general restriction, no. US citizens and nationals who have been in the DRC during the preceding 21 days cannot board international flights to the United States, unless a specific government exemption applies.

4. Which airports can eligible US citizens use after visiting Uganda or South Sudan?

The three designated airports are Washington Dulles International Airport, Hartsfield-Jackson Atlanta International Airport and John F. Kennedy International Airport.

5. Does airport transit count as visiting an affected country?

Yes. The CDC counts transit through an airport in the DRC, Uganda or South Sudan as physical presence, even when a passenger does not leave the aircraft.

Closing Update: Vietnam Airlines Passengers Must Check Travel History Before US-Bound Flights

Vietnam Airlines’ implementation of the new US public health requirements marks an important change in departure procedures for passengers travelling to America from November 2026.

The mandatory declaration applies broadly to international air travellers, while additional restrictions affect people who recently visited the Democratic Republic of the Congo, Uganda or South Sudan.

The rules are especially significant for passengers with complex international itineraries, including journeys involving transit stops in the affected countries.

For travellers without relevant travel history, the main additional requirement is completing the CDC declaration.

For affected passengers, the consequences can include denied boarding, delayed journeys or the need to enter the United States through a designated airport.

The CDC has scheduled its amended attestation order to remain effective until 18 December 2026, unless changed earlier. Travellers should continue checking official guidance before departure.

The most important preparation is straightforward: review the previous 21 days of travel, complete all required declarations accurately and confirm that the intended flight complies with the applicable US entry and public health rules.

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