Short answer: At check-in, the airline may refuse to board you or ask you to buy a ticket out. On arrival, immigration can refuse you entry — some countries list a missing return ticket as a reason in their law — and you’d be sent back on a flight.
At airline check-in
If your destination requires proof and you can’t show it, the airline can refuse to board you. Airlines check documents before departure using IATA’s Timatic database, which IATA says helps them avoid immigration fines.
In practice, you may be asked to buy a ticket out on the spot — usually at a high last-minute price.
At immigration
Immigration officers decide whether to let you in. Some countries spell out that a missing return ticket can be grounds for refusal: Peru’s Migration Law lists lacking a return ticket, when one is required, among the reasons officers can refuse entry (Legislative Decree 1350, article 48.1(h)). In the Philippines, a return or onward ticket is one of the conditions of visa-free entry.
If you’re refused entry, you’ll normally be put on a flight out. US law, for example, says a passenger ordered removed on arrival is removed on an aircraft of the airline they arrived with.
Can you sort it out after landing?
Sometimes an officer will let you show a booking on your phone, and some travellers buy a ticket at the airport. You can’t count on either — the safest option is to have proof before you fly.
What to do before you travel
- Check your destination with our free checker.
- Get a return or onward ticket, or a confirmed flight reservation with a real booking reference.
- Make sure it leaves within your permitted stay and matches the name on your passport.
- Keep a copy you can open offline.
Frequently asked questions
Will I definitely be refused without one?
Does having proof guarantee entry?
What if the country doesn’t require it?
Sources
- Migration Law (Legislative Decree 1350) and regulationSuperintendencia Nacional de Migraciones, Peru
- Free to enter the Philippines without visa (Executive Order No. 408)Philippine e-Visa portal, Department of Foreign Affairs
- 8 U.S.C. §1231(c) — Removal of aliens arriving at port of entryUS Code (govinfo.gov)
- TimaticInternational Air Transport Association (IATA)
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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