Airports & terminals
What documents do I need for a cross-border airport transfer?
Answered by the Toronto Airport Limo team · Last reviewed July 6, 2026
Every person in the vehicle needs their own valid travel document, and there are two separate checks on the same trip — one to cross the land border, and another to board your flight. Adults crossing by road should carry a valid passport, or a NEXUS card, which also opens the dedicated lane at the major bridges. Canadian and US citizen children under 16 have historically been able to cross by land on a birth certificate, but a passport is the safer choice for anyone who is going on to fly. Requirements are set by the border agencies and change over time, so confirm the current rules on the official Canadian and US government sites before you travel.
Two document checks, not one
A cross-border airport transfer stacks two entirely separate requirements on the same journey, and mixing them up is the classic way to arrive at Buffalo with a problem. The first check is at the bridge, run by border officers who decide whether you may enter the country. The second is at the airline counter and the security checkpoint, where the question is whether your identification is acceptable for the flight you are about to take.
Those two checks do not accept exactly the same things. A document can be perfectly valid for driving across and still be no use at all when you present it to check in for a flight, particularly an international one. That is why the practical advice for a Buffalo trip collapses into a single line: bring the passport, even if something else would technically get you over the bridge.
The one document that clears both is a valid passport, which is why we recommend it as the default for every traveller on this run, adults and children alike. Treat anything else as a supplement rather than a replacement.
- Check one: the land border, decided by border officers at the booth
- Check two: the airline counter and security, decided by carrier and airport rules
- The two checks accept different things — do not assume one covers the other
- A valid passport is the document that satisfies both
Counting heads: everyone travels on their own document
There is no such thing as a family document at a border. Each person in the car — the driver of the conversation, the quiet teenager, the sleeping toddler — is an individual traveller who must be accounted for and, in nearly all cases, must have something of their own to present.
This trips up parties assembled at the last minute. A colleague who joins the ride at the office, an in-law collected on the way, a friend who decided to come along: each of them changes the passenger list, and each needs their documents in hand rather than at home in a drawer. Tell us the head count when you book so the vehicle is right, and check the documents at the same time.
Expired is the other classic. Passports expire quietly and people discover it on the QEW. Some destinations also expect validity to extend some months beyond your travel dates, which is an airline and destination matter rather than a border one — another reason to look at the actual booklet a few weeks out, not the night before.
- One valid document per person, infants and children included
- Late additions to the party need their own documents too
- Check expiry dates weeks ahead, not the night before
- Some destinations require validity beyond your return date
Adults: passport, NEXUS, and where an enhanced licence stops
For adults crossing by road, a valid passport is the straightforward answer. A NEXUS card is the other clean option at the land crossings, with the added benefit of the dedicated lane at the major bridges, which is the single legitimate way to spend less time in a queue.
An enhanced driver's licence, where a province or state issues one, is designed for land and sea crossings. The catch is precisely the one described above: it addresses the bridge, not the boarding gate. If you are being driven to Buffalo in order to fly somewhere, an enhanced licence alone leaves you standing at a counter with the wrong document.
An ordinary driver's licence is not a travel document and does not cross a border on its own, however Canadian it looks. If your passport has gone missing or expired, renewing it is the trip-critical task — no operator can drive you around that requirement, and no amount of goodwill at the booth substitutes for it.
- Valid passport — works at the bridge and at the airline counter
- NEXUS — accepted at the land border and opens the dedicated lane
- Enhanced driver's licence — for the crossing only, not for flying
- A standard driver's licence is not a travel document
Children, teenagers and travelling without both parents
Canadian and US citizen children under 16 have long been able to cross the land border on a birth certificate rather than a passport. It is a real provision and worth knowing, but for an airport trip it is usually the wrong tool, because the child is about to fly and the airline is a separate authority with its own requirements.
The more common complication is a child travelling with one parent, a grandparent or a school group. Border officers pay close attention to who is travelling with whom, and Canadian government guidance recommends carrying a consent letter from the non-accompanying parent or guardian, along with anything else that explains the arrangement — custody documents, a death certificate where relevant.
None of this is meant to alarm; the vast majority of family crossings are unremarkable. But the officer's job includes protecting children, and a parent who can produce a letter in ten seconds turns a potentially long conversation into a short one. Prepare it in advance, and keep it with the passports rather than in an email you will need signal to open.
- Under-16 citizens have historically crossed by land on a birth certificate
- For a trip that ends in a flight, bring the child's passport regardless
- One parent travelling alone: carry a consent letter from the other
- Keep supporting paperwork on paper, not only in an inbox
If you are not a Canadian or US citizen
Then your requirements are set by your nationality and your immigration status, and they can differ depending on whether you arrive by air or by land. Visas, electronic travel authorisations and permits all have their own rules, and the rules change. This is the one part of the trip where general internet advice is genuinely dangerous.
Check the official sources for your own passport well before you book: the US government for entering the States, and the Government of Canada for coming back. Study permit holders, work permit holders and Canadian permanent residents should carry the document that proves that status alongside the passport itself.
If there is any doubt at all, resolve it before the trip rather than at the bridge. A student who discovers a paperwork problem at the booth loses a flight; the same student who discovers it a fortnight earlier simply fixes it. Once the documents are settled, the rest of the run is straightforward — our answer on how a cross-border transfer actually works walks through the ride itself.
- Requirements follow your nationality and status, not your address
- Air and land entry rules are not always identical
- Permanent residents and permit holders: carry the proving document too
- Verify on official government sources, and do it early
Plan a Buffalo airport transfer
Related questions
Do babies and toddlers really need documents to cross?
Yes — every person in the vehicle is a traveller, including one who is asleep in a car seat. Canadian and US citizen children under 16 have been able to use a birth certificate at land crossings, but for an airport transfer where a flight follows, a passport is the sensible document to carry for the child as well as the adults.
Is NEXUS worth having for the trip to Buffalo airport?
If you make the crossing regularly, yes. It is accepted at the land border and it gives access to the dedicated lane at the major bridges, which is the only real way to reduce time in a queue. For a once-a-year trip it is probably not worth the application, and a passport does the job perfectly well.
What happens if one person in the car has the wrong document?
That person may be refused entry, and the trip cannot continue for them. The chauffeur has no discretion in the matter and no way to negotiate it — admission is entirely the border officer's decision. This is why the document check happens at the kitchen table days earlier, rather than in the queue at the bridge.
Can we use an enhanced driver's licence instead of a passport?
For the crossing itself, an enhanced licence issued for that purpose is designed to work. For the flight you are catching at Buffalo, it is not the identification the airline is looking for, especially on an international itinerary. On an airport run, bring the passport and treat the enhanced licence as a convenience rather than the plan.
Do you check our documents before the trip?
We ask about the passenger list and we will always flag the requirement, but we do not inspect or verify anybody's papers — that is not our role and it would not carry any weight at the booth in any case. Responsibility for having valid documents rests with each traveller, which is why we raise it clearly at booking rather than quietly.
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