Short answer: Almost every onward-travel problem happens at the airline desk rather than at the border, because the airline checks first. If the agent is not satisfied, you do not board — and that decision is made in a minute or two, with whatever you can show on the spot.
Why the airline checks before the country does
If a traveller is refused entry on arrival, the airline that carried them generally has to carry them back, and in the United States the carrier is also liable for the costs of detention and removal under 8 U.S.C. §1231(c).
Airlines therefore check entry requirements at check-in, using industry databases such as IATA’s Timatic. The agent is not making a judgement about you; they are avoiding a cost their employer would otherwise carry.
The mistakes that cause trouble
These are the ones that come up again and again, and every one of them is avoidable.
- A name that does not match the passport. The booking must carry your name exactly as the passport shows it; a missing middle name or a swapped surname is enough to stall a check.
- A reservation that expires before you fly. A held booking is released after a set period, so one made a fortnight early may be gone by the time you reach the desk.
- Something that cannot be verified. A screenshot, a PDF with no reference, or a booking the airline cannot find is worth nothing at the counter.
- Onward travel that falls outside the permitted stay. Proof of leaving in 90 days does not help where the visa-free limit is 30.
- Nothing available offline. Airport wi-fi fails. Keep a copy on the phone that works without a connection, and a printout if you can.
What to have ready
A booking reference you can look up on the airline’s own site, in your passport name, valid on the day you travel, showing you leaving within the stay your destination allows. That is the whole list.
Our free checker shows what each destination asks for and cites the official rule.
Frequently asked questions
Does the border officer check as well?
Is a screenshot enough?
What if my plans change after I arrive?
Sources
- 8 U.S.C. §1231(c) — Removal of aliens arriving at port of entryUS Code (govinfo.gov)
- TimaticInternational Air Transport Association (IATA)
- Free to enter the Philippines without visa (Executive Order No. 408)Philippine e-Visa portal, Department of Foreign Affairs
- New Zealand Electronic Travel Authority (NZeTA)Immigration New Zealand
General information, not legal advice. Airlines and immigration officers make the final decision. Rules change — check the official source before you travel.
Applying for a visa?
Visa Application Kit for Schengen and UK visitor visas
Document checklists cited to the official rules, a timeline, the refusal grounds, and nine letter templates as a PDF and an editable Word file.
Rules by destination
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