The document weighs more than the destination
For a couple of men or a couple of women the opening question is the country. For a trans or non-binary person there is a question before that one, which is what the document you will cross the border with says and whether it will match your face, your name and the rest of your bookings.
A passport with an X marker works, technically, in any reader in the world. The standard that governs machine-readable passports, the International Civil Aviation Organization's Doc 9303, allows three values in the sex field, M, F and X, with their equivalent in the machine-readable zone. It has been in the standard for years.
Who issues one and who accepts it is another matter. Sixteen countries legally recognise a third gender marker, and they are Argentina, Australia, Bangladesh, Canada, Chile, Colombia, Costa Rica, Denmark, Germany, India, Iceland, Malta, Nepal, the Netherlands, New Zealand and Pakistan. That list looks nothing like a list of comfortable places to travel. Nepal has recognised a third gender since 2007 and carried it in passports since 2015, while India, which also recognises one, removed self-identification through a reform signed on 30 March 2026.
The United States, the case to check before buying a ticket
In January 2025, executive order 14168 instructed federal agencies to recognise only two sexes and to stop issuing new passports with an X marker. In June of that year a federal judge granted a preliminary injunction in Orr v. Trump requiring the State Department to keep issuing passports with M, F or X to certain people while the case runs its course.
According to the State Department itself, new applicants today receive a passport with M or F according to sex assigned at birth, and US passports already issued with an X remain valid for travel and for re-entry into the country.
The matter is in litigation and can change from one month to the next. If your passport is American and carries an X, or if it is due for renewal, check where the case stands before booking anything. It is the one point in this guide we suggest re-checking every time.
Airport screening
Airport body scanners have been working off a button for years. The officer presses male or female before you step in and the machine flags any part of the body that does not fit what it expects from that profile, and that is where the pat-downs come from.
In the United States that changed. Since February 2022, gender is no longer part of validating your document at the podium before the checkpoint, and what has to match is the name between document and ticket. The TSA also announced it would replace the gender-based system with one that does not use it, a less invasive procedure for anyone who sets off the scanner in a sensitive area, and an X marker option in PreCheck, by self-attestation rather than by document, from April 2022.
Its pat-down rules add two things. That at any point during screening you can ask for it to be done in private and with a witness of your choosing. And that it is carried out by an officer of the same sex, which is where the friction shows up when document and presentation do not line up, so it is the part most worth thinking through in advance.
Outside the United States there is no common rule. In many airports the scanner is still operated with the button, and what you are granted when you ask for private screening depends on the country rather than on a written rule you can invoke. Arriving with time to spare is what reduces the problem most.
Medication
Testosterone is a controlled substance in a fair number of countries. In the United Kingdom it appears on the official list of controlled drugs as class C, schedule 4 part 2. That does not mean you cannot travel with it, it means the prescription is not a formality.
The British rules give a reasonable idea of what any check will ask of you. They call for the prescription or a letter from your doctor proving the medication is yours, no more than three months' supply, and a check with the destination country's embassy on what it requires, because each has its own list.
Then there is the practical side. Medication travels in hand luggage and not in the hold, because a suitcase gets lost and a treatment does not wait. In its original packaging, box and leaflet included. With the active ingredient written down separately, because the brand name changes from country to country and the active ingredient does not. And if your treatment is injectable, the needles travel with the medication and with the prescription that accounts for them.
The thirteen countries
The risk map for a trans person is not the same as for a gay couple.
The Human Dignity Trust, which keeps the most cited register on this, counts sixty-six jurisdictions criminalising private consensual same-sex sexual activity, forty-two countries that expressly criminalise relations between women and thirteen countries that criminalise gender identity or expression through laws against "cross-dressing", "impersonation" or "disguise".
Those thirteen do not always overlap with the sixty-six. There are destinations where a discreet couple of men goes unnoticed and a person whose paperwork does not match their appearance has a problem at the first checkpoint. The reverse happens too, with countries that recognise a third gender on documents while punishing same-sex relations.
What to look at on each country page
In this directory trans rights sit in an indicator separate from the couple's legal framework, precisely because the two do not move together. It shows whether legal gender recognition exists, whether a medical report or surgery is required, whether there is self-determination, and whether there have been recent changes in either direction.
That indicator is currently on 131 of the 200 countries and all 131 carry a linked source. For the other 69 we have not been able to document it yet and we would rather leave it empty than fill it in by eye, so if the country you care about is one of those, the empty field means we have no figure we can stand behind.
The order that works is the country and its trans indicator first, then the document you will travel on, then the medication, and the city last.
