Passport validity and blank pages before you fly

Check the destination's exact passport-validity wording. There is no single six-month rule for every country, passport or route. You also need enough usable pages, an acceptable document condition and the correct passport for any linked visa or authorisation.

Official sources retrieved on 9 November 2026. Examples below identify their nationality scope. They are not a passport renewal assessment or permission to travel. Your transit countries and airline document checks also matter.

Find the date the rule is measured from

"Six months remaining" is incomplete unless you know the starting point. A requirement can be measured from arrival, planned departure or the end of a proposed stay. Copy the full sentence from the applicable official guidance into your travel notes.

The Indonesian Visitor Visa FAQ, which lists US and Canadian passports among eligible nationalities, says the passport expiry date must be at least six months from arrival.

By contrast, UK government guidance for British citizen passports visiting South Africa says at least thirty days after departure. Its Morocco guidance says three months after arrival.

These are different calculations. They do not establish the rules for every nationality, but they show why copying one global rule into every itinerary is unreliable.

A worked planning example

Suppose your flight reaches a destination on 12 June and leaves on 26 June. First write down both local calendar dates, especially if an overnight flight changes the arrival day. Then apply the exact official wording to those dates.

If the requirement is measured from arrival, do not start counting from the day you leave home. If it is measured from departure, account for the final day you will actually leave that country, not the end of the holiday as a whole.

This is a method, not a legal calculator. If your passport is close to the threshold, ask the relevant authority and airline to confirm the calculation rather than relying on mental arithmetic or an unofficial rounding convention.

Do the check before buying non-refundable travel where possible. Passport replacement and a new visa application are not tasks to discover at check-in.

Distinguish a requirement from a recommendation

UK guidance for British citizen visitors to Mexico says the passport must be valid for the duration of the stay. It separately reports the Mexican embassy's recommendation for at least 180 days.

A recommendation and a mandatory minimum are not interchangeable. Neither should be erased: one tells you the stated entry condition; the other may provide a practical safety margin. Read both in context and check the rule that applies to your nationality.

Connections can make the distinction important. A passport that meets the final destination's requirement may fail a transit country's separate requirement if the connection involves entering that country.

Count usable visa pages

An empty space on a page is not necessarily a blank visa page. Read whether the authority requires blank pages, unused visa pages or a particular arrangement. Do not assume an endorsement or observation page is suitable.

The Tanzanian visa process calls for at least one unused visa page before application. The South Africa page cited above specifies two blank pages for British citizen passports. UK guidance for Vietnam also specifies two for British citizen passports.

Check the whole passport rather than the last few pages. If the requirement is unclear, ask the authority before departure. Do not remove stamps, alter pages or try to repair the document yourself.

Inspect the document's condition

Expiry is not the only failure point. UK guidance for British travellers to Vietnam says damaged passports have caused refusal of entry and exit. The Morocco page also records refusals involving damage.

Look at the identification page, photograph, binding and pages for damage or unauthorised alterations. If you are unsure whether a document is acceptable, contact the issuing passport authority. A scan on your phone is useful backup information but is not a substitute for an accepted travel document.

A passport previously reported lost or stolen can remain invalid even if you later find it. Resolve its status with the issuing authority; do not assume finding the booklet restores it.

Replacing a passport can create a second task

When a visa or travel authorisation is passport-linked, renewing the passport may require updating the permission or applying again. Check the scheme rather than carrying an old approval and hoping the new passport number is irrelevant.

The Indonesian FAQ says the information on the Visitor Visa must match the passport and that a passport change requires a new application. Other schemes have their own rules, so do not generalise this process.

For dual nationals, also check whether the destination requires use of its own passport. Use consistent documents for entry and exit when the destination requires it; Vietnam's UK guidance expressly says to use the same passport.

When official pages disagree

Brazil illustrates why uncertainty should be visible. The Brazilian consulate in Vancouver says passports must cover the intended stay, with no minimum additional validity. UK guidance for British citizen passports says six months after arrival.

This guide does not invent a universal resolution. Establish which passport and application route the guidance covers, then contact the relevant Brazilian authority and airline if the difference affects you. Record the advice and source date. An unexplained disagreement is not a reason to choose the more convenient answer.

Your pre-booking passport worksheet

For each destination and connection, record the passport used, arrival and departure dates, required validity reference point, blank-page requirement and source. Add the date you checked it.

Then inspect the physical document and confirm any linked permission remains valid. Recheck after changing flights, extending the trip or renewing a passport. A green visa result answers one part of entry planning; it does not check the condition of the booklet in your hand. Start with the TripColour checker, then read the applicable official conditions.