Short answer
A one-way ticket is what usually prompts an onward ticket check, because nothing in your booking shows the airline that you will leave. Before flying, find out whether your destination makes onward travel a condition for your passport and entry type, and if it does, have a booking out that the agent can look up. At check-in, expect to be asked before the boarding pass is issued.
Why one-way travellers get asked
With a return ticket, the agent sees your way out on the same booking. With a one-way ticket, there is nothing to see. If the destination expects visitors to show onward or return travel, the airline's system flags the gap, and the agent has to close it before boarding you, because the airline is the one that flies you back if you are refused entry. Do airlines check onward tickets explains that liability in full.
GOV.UK's advice for British travellers gives a sense of how routine this is: UK visitors to the Philippines are expected to have proof of return or onward travel, and a visa on arrival in Indonesia requires proof of an onward or return journey.
Who flies one way, and what fits
| Traveller | Situation | What to prepare |
|---|---|---|
| Long-term traveller | Next country not decided | A verifiable booking out, timed to be live at check-in |
| Separate tickets in and out | Exit already booked, on another booking | The second booking's reference and PDF |
| Overland exit planned | Leaving by bus or ferry | The overland booking, plus a flight booking if the airline agent may not accept it |
| Moving on a long-stay visa or permit | The visa itself allows a long stay | The visa or permit; an onward booking may still be asked for |
| Citizen returning home | Entry rules for visitors do not apply | Your passport |
Before you fly
- 01Check the rules for your passportEntry conditions depend on nationality and entry type. Run your trip through Trip Check, then read the destination page, for example Peru or Costa Rica.
- 02Decide what you will showA ticket you will use, a refundable ticket, an overland booking or a held reservation. How to get proof of onward travel compares them.
- 03Time it for check-inA hold lasts hours to days, so create it close to your flight. See when to get an onward ticket.
- 04Match the name to your passportFamily name and given names, spelled as in the passport. Names cannot be corrected on a hold; a wrong name means a new booking.
- 05Carry it three waysThe booking reference written down, the PDF saved offline, and a printed copy.
- 06Verify it yourselfLook the booking up on the airline's website before leaving for the airport, as described in how to verify a flight reservation.
What happens at check-in
The check itself is short. Here is how it typically runs for a one-way passenger with a held reservation as proof.
- Booking: one-way London Heathrow to Manila, no return
- Agent: enters the passport; the system shows the entry conditions for that nationality
- Agent: asks for proof of onward travel, since none is on the booking
- Traveller: shows a held reservation, Manila to Singapore, dated inside the permitted stay, reference K7QX2M
- Agent: checks the name against the passport and the date against the stay, and may look the reference up
- Outcome: if the agent is satisfied, a boarding pass is issued; the final decision is always the airline's
If the agent refuses, ask exactly what would be accepted. The usual fix is a different booking made on the spot. Onward ticket at the airport covers each scenario at the counter and at immigration.
Questions
01Can I fly one way without an onward ticket?
Yes, if your destination does not require proof for your passport and entry type, or if you enter on a visa or permit that covers your stay. Where proof is required, the airline may refuse to board you without it.
02Do I need an onward ticket for a one-way flight home?
No. Onward travel rules apply to visitors. Citizens returning to their own country do not need to show a way out.
03Does a long-stay visa replace an onward ticket?
Often, because the visa itself sets how long you may stay. Some airlines may still ask, so carry the visa approval and be ready to explain your plans.
Sources
- 1Philippines travel advice: entry requirements · GOV.UK, Foreign, Commonwealth & Development Office · checked 29 September 2026
- 2Indonesia travel advice: entry requirements · GOV.UK, Foreign, Commonwealth & Development Office · checked 29 September 2026
Last reviewed 29 September 2026. Rules change: confirm with the airline and the official source before you travel. How we research · Report a correction