A connection in Incheon is one of the most common reasons people end up on this page, and the answer turns on a single question: do you leave the international transit area?
If you stay airside
Passengers who remain in the international transit area and board an onward flight do not enter Korea. In that case no entry permission applies, because there is no entry.
If you leave the airport
Going through immigration — to collect checked baggage, to stay overnight outside the airport, or to see the city between flights — is an entry. That is when the K-ETA or an applicable exemption matters, exactly as it would for a holiday.
Long layovers are where people get caught
- Baggage that is not checked through to the final destination forces you to enter.
- An overnight connection with a hotel outside the airport is an entry.
- Terminal changes that require re-entry through immigration are an entry.
Decide this before you book, not at the transfer desk. If there is any chance you will leave the airport, apply and have the permission in hand — it is valid for 3 years, so it is not wasted.
Source: K-ETA official portal
More about K-ETA
What is K-ETA
K-ETA is an electronic travel authorisation for visa-free travellers to South Korea. What it is, who it applies to, and why many nationalities do not need it right now.
Do I need K-ETA?
Many nationalities are temporarily exempt from K-ETA. How to check your own passport, and what applies if you are not exempt.
How to apply
Applying for K-ETA on the official site: what you need in front of you, where people get stuck, and what happens after you submit.
Cost
What K-ETA actually costs on the official site, why third-party sites charge more, and when the cost is zero.
What you need
What you must have ready to complete a K-ETA application, and the photo and name rules that cause most rejections.
Processing time
Official guidance on K-ETA processing, what makes it slower, and why no paid service can speed it up.