Yellow Fever, the eTA and the Twelve-Hour Layover Rule: Kenya Entry Requirements for South American Travellers

Why the guides you have read do not apply to you

Search for Kenya entry requirements and you will find a hundred articles saying the same thing: passport valid six months, apply for the eTA online, yellow fever vaccination not required. Every one of those articles is written for someone flying from London, Berlin, Madrid or New York — and for those readers it is correct.

If you are flying from Buenos Aires, Bogotá, Lima or São Paulo, one line of that advice is wrong, and it is the line that matters. Kenya does require a yellow fever certificate from you, and it is checked on arrival.

I have written this guide because I have watched it go badly. It does not usually end in a refused entry — Kenyan health officials are practical people — but it can end in a vaccination at the airport, a mandatory quarantine period, or an airline declining to board you at your departure gate, which is worse because it happens before you have left home. All of it is avoidable with ten minutes of reading and one appointment.

The yellow fever certificate: who actually needs one

Kenya requires a valid yellow fever vaccination certificate from every traveller aged one year and over who is arriving from — or has transited through — a country with risk of yellow fever transmission. This is a World Health Organization framework, not a Kenyan invention, and it exists because yellow fever is carried by travellers, not by geography.

The South American countries on the risk list are Argentina, Bolivia, Brazil, Colombia, Ecuador, French Guiana, Guyana, Paraguay, Peru, Suriname, Trinidad and Tobago, and Venezuela. If you are flying to Kenya from any of them, you need the certificate. There is no exemption for holding a European passport, no exemption for a short trip, and no exemption for travelling in a low-risk part of the country. The rule keys on where your journey started, not on where you personally have been.

Chile and Uruguay carry no yellow fever risk. Chilean and Uruguayan travellers flying from home do not need the certificate — with one large exception that gets its own section below, because it catches people every year.

A useful mental model: Kenya is not asking whether you are ill. It is asking whether your itinerary passed through a place where yellow fever circulates. Answer that question honestly when you plan and the rest is straightforward.

The twelve-hour transit trap

This is the part almost nobody writes down, and it is the reason Chilean travellers in particular should keep reading.

The requirement is triggered not only by departing from a risk country but by transiting one for more than twelve hours. Spend thirteen hours in an airport in a yellow fever risk country on your way to Nairobi and you need the certificate, even if you never left the terminal and even if you started in a country with no risk at all.

Now look at how a Santiago itinerary is usually built. Santiago to São Paulo, a long overnight wait at Guarulhos, then the Ethiopian service to Addis Ababa and on to Nairobi. Brazil is a yellow fever risk country. If that layover runs past twelve hours — and overnight connections often do — a Chilean traveller who correctly believed the certificate was unnecessary now needs one. The same logic applies to any routing with a long wait in Bogotá, Lima or Panama City.

The fix is simple and it belongs in the booking stage, not the packing stage. Either choose a connection under twelve hours, or get vaccinated anyway. Given that the certificate is now valid for life and the vaccine costs very little, my honest advice to any South American traveller is to get it regardless of your routing. It removes an entire category of problem for the rest of your travelling life.

Getting the vaccine and the certificate

The vaccine must be administered at least ten days before you arrive in Kenya. That ten-day window is not a suggestion — the certificate is not considered valid until the tenth day after vaccination, and an official checking your card can count.

Since a 2016 World Health Organization ruling, yellow fever certificates are valid for life. Older certificates showing a ten-year expiry are still valid; you do not need a booster and you should not let a clinic sell you one. If you were vaccinated years ago for a trip to the Amazon or the Brazilian interior, dig out that yellow card before you book an appointment. It still counts.

What you need is the international certificate of vaccination, the yellow booklet, properly stamped and signed by an authorised vaccination centre. A printout from a clinic system or a note in a national health app is not automatically the same thing. In most South American countries the vaccine is available free or at low cost through the public health system, and the international certificate is issued by designated centres — in Argentina through ANMAT-authorised vaccinatorios, in Chile and Peru through the health ministry international vaccination offices, and in Colombia through the national network. Ask specifically for the international certificate, not just the vaccination.

Carry the physical card with you. Do not pack it in your checked bag, and do not rely on a photograph on your phone. It gets checked at Nairobi arrivals alongside your passport, sometimes before you reach immigration, and a paper card in your hand moves a lot faster than a battery at three percent.

Practical timing: book the appointment as soon as you book flights. Ten days is the legal minimum, but appointment availability is the real constraint, and in peak travel months some centres run weeks out.

Exemptions, and how to document them properly

Some travellers genuinely cannot take the yellow fever vaccine. The recognised exemptions are infants under nine months of age, pregnant women outside of an active outbreak situation, people with severe allergy to egg protein, and people with significant immunodeficiency, including some patients on immunosuppressive therapy.

An exemption is not something you assert at the border. You need a medical waiver letter from your doctor, ideally on letterhead, stating the contraindication, and it should be recorded in the exemption section of the international certificate booklet by the vaccinating centre. English or Spanish is fine; a letter only in Portuguese may slow you down.

If this applies to you, tell us early in the planning. It is entirely workable, but it is worth having the paperwork reviewed before you are standing at a check-in desk with an airline agent who has seen precisely one of these before.

The eTA: thirty dollars, online, before you fly

Separate from the health requirement, every visitor to Kenya needs an Electronic Travel Authorisation. There is no visa on arrival any more and there are no exemptions for South American passports.

Apply online at the official Kenyan government portal, etakenya.go.ke, for US$30. Approval usually comes within a few days, though it can be slower in peak season. Apply at least two weeks before travel — not because the process is difficult, but because the one week before an international trip is the week you least want to be refreshing an inbox.

You will need a passport valid at least six months beyond arrival with a blank page, a recent passport photograph, your flight booking, and your accommodation details. If you are travelling with us, we provide the accommodation and itinerary confirmation you need for the application; just ask.

Two warnings. First, use only the official government site. Search results are full of third-party services that charge two or three times the fee for filling in the same form. Second, the eTA is per person, including children, so a family of four is four applications.

We have a fuller walkthrough of the eTA process and general entry requirements here in the Journal if you want the step-by-step version.

If Tanzania is also on your itinerary

A lot of South American travellers, having flown this far, want the Serengeti as well as the Mara. That is a good instinct and we build the combined trip often, but it adds two requirements.

Tanzania requires its own visa, applied for online in advance, and it requires a yellow fever certificate from travellers arriving from a risk country or from Kenya by land. If you are already carrying the certificate for your Kenya entry, this costs you nothing extra — which is another argument for getting vaccinated even if you think you might squeak under the transit rule.

The land border crossings between Kenya and Tanzania are used to this and are generally smooth. What they are not used to is a traveller producing a phone photograph of a certificate at a desk without reliable connectivity. Paper card, in your hand, again.

A sensible timeline

Six to nine months out, book flights and check your passport expiry against your return date plus six months. Renew now if it is close; a passport renewal in high season is slower than you think.

Three months out, book the yellow fever vaccination appointment, or locate your existing yellow card. If you need a medical exemption letter, start that conversation now.

One month out, apply for the Kenya eTA and the Tanzania visa if relevant. Confirm your travel insurance covers a multi-connection long-haul itinerary and includes medical evacuation, which matters more in remote parks than most policies assume.

One week out, print everything: eTA approval, flight confirmations, accommodation vouchers. Put the yellow card in your hand luggage with your passport, not in your checked bag.

Requirements do change, and this guide reflects how things stand in August 2026. Always confirm against the official Kenyan government sources close to your travel date — and if you are travelling with us, ask. Checking this for guests is part of the job, and I would far rather answer the question twice than have you discover the answer at a departure gate.