You're flying to Seoul on a one-way fare and the desk has just asked for proof you'll leave South Korea. Stay calm. A dummy ticket, also called an onward ticket, is a real PNR booked for visa or border-check purposes without paying for the flight. This page is sorted by how much time you have. Find your window, then act.

If you have a week or more

Good. This is the easy version.

Start with the rules. Read the entry requirements in the UK government's South Korea travel advice, or the equivalent page from your own government. Depending on your passport, you may need to register or apply before you travel. The official page tells you which.

Then think about the exit. Pick a departure date inside your intended stay. Pick a route that fits your real plan. Write your name exactly as the passport prints it.

Keep it simple. One arrival, one departure.

A week gives you room to test properly. Check the booking once when you make it, again about 48 hours before you fly, and a third time on the morning of departure. Each check takes two minutes. The third one is the one that catches a lapsed reservation while you can still do something about it.

Action: Book the onward leg, then open the airline's manage-booking page and confirm your name, route and date appear.

If you have a day

Now speed matters, but accuracy still wins.

Do the checks in this order:

  1. Confirm the booking exists on the airline's own site.
  2. Compare the name with your passport, character by character.
  3. Match the dates to your hotel.
  4. Save a PDF and a screenshot offline.

You've got a day, which is plenty if you don't waste the first hour. Spend 45 to 60 minutes on the booking and the checks, then stop. Extra tinkering only adds mistakes.

Airlines usually screen passengers against IATA's Timatic database. The agent follows what it says for your passport and destination. If it asks for onward travel, you can't board without it.

Our timing checklist for verifying an onward ticket PNR shows what to check and when, which saves you guessing.

Action: Run the four checks tonight, not at the airport.

If you're at the desk right now

Breathe. Short sentences from here on.

The agent asked a question. Answer it. Say yes if you have a booking, and offer the reference. Don't explain your life story.

If you don't have a booking yet, ask whether you have time to arrange one before check-in closes. Many carriers close the desk well before departure, and the time varies by airline, so ask at once. Don't wait.

You can arrange a booking from your phone. The reservation needs to be real, retrievable and in your passport name. That's all the agent can check.

Stay polite. Arguing wastes minutes you don't have.

Keep the phone charged and the screen bright. Open the booking before you speak to the agent again, so the reference is one tap away. Have your passport open at the photo page in your other hand. Hand over the passport first, then show the booking. Agents work through a routine, and following it makes things faster.

Action: Ask how long you have, then book the onward leg on your phone and show the manage-booking page.

If your booking won't show up or the dates clash

The booking can't be found

You've got a reference, but the airline's site says it can't find it. This happens, and it's fixable.

Check the usual suspects first:

  • The surname is spelled differently from your passport.
  • A hyphen or space is missing.
  • You've entered the reference with a zero where there's a letter O.
  • The reservation was cancelled or lapsed.

Our guide on what to do when an onward ticket won't verify on the airline site walks through each cause. Read it if the first three fixes don't work.

If the booking has lapsed, you'll need a new one. Don't argue with the screen.

If a replacement is needed, make it match the old one as closely as you can: same route idea, same date logic, same spelling. Then recheck it on the airline site before you close the tab.

Action: Re-enter the details with the passport spelling, and if it still fails, make a fresh booking.

The dates don't match your other documents

Your hotel says one thing. Your onward booking says another. Fix it before somebody asks.

An officer or agent compares documents side by side. Any gap invites a question. The question isn't dangerous, but it eats time.

Choose which document to change. A hotel can often be amended. An onward booking can be rebooked. Whichever is easier, make both say the same thing.

Action: Align the dates today, then save the final versions offline.

If they've already refused you

This is the hard one. Keep your head.

First, understand what happened. Either the airline decided not to board you, or an officer decided not to admit you. Those are separate decisions with separate routes.

If it was the airline, ask the agent what exactly they needed and whether you can fix it now. Often the answer is a valid onward booking, which you can arrange quickly. If it was an officer, be courteous, ask what you can do next and follow their instructions.

Don't argue. Don't raise your voice. Don't present anything that isn't genuine. Forged documents are a serious problem, and they turn a fixable delay into a much bigger one.

This is general guidance, not legal or immigration advice. If your situation is complicated, speak to your airline, your embassy or a qualified adviser.

Action: Ask for the specific reason, fix what's fixable, and contact your embassy if the refusal stands.

One last rule

Rules change. Officers use discretion. Airlines apply their own policies. Nothing here guarantees entry, and no onward booking can promise it.

What you can control is the paperwork: matching names, matching dates, a booking that shows up when someone looks. Keep those three right, and most problems stay small.

Need the booking now? Get your onward ticket and test it before you leave for the airport.