The official minimum is 72 hours; a good plan allows more
Quick answer
File at least 72 hours before departure as the authorities advise, and in practice one to two weeks ahead: if something is wrong or extra documents are requested, you still have time to fix it. Never apply after boarding or once already in Korea — it can cost you the trip.
Seventy-two hours is the standard the system communicates, but volume during peak seasons — autumn foliage in October, the year-end snow period — can stretch some decisions.
Airlines commonly check K-ETA status at check-in, and without approval you may be denied boarding. Non-changeable promotional tickets carry real risk if you file late.
A safe order of operations: book the first night, file the K-ETA with that real address, then plan the rest of the itinerary. What you declared and what you do then always match.
If you filed long ago, re-check the status and remaining validity before departure — especially travellers who applied a couple of years back and may not realise it has lapsed.
Families travelling together should file everyone at once and verify every result; the classic failure is one member's approval lagging behind and nobody noticing.
Yes, and it is the safest approach given the multi-year validity.
Contact the airline and the K-ETA service centre immediately and prepare to move your date.
No refiling needed; K-ETA is not tied to a single flight.
Airside transfers generally do not require it, but leaving the airport does; confirm the current rule before you fly.
The fee is not refunded, but the approval stays valid until it expires, so it is not wasted if you travel later.
3 points • reviewed 2026-09-15
Reviewed and last updated: 2026-09-15
2 sources • every claim is traceable
https://www.mfds.go.kr/eng/index.do
https://www.mohw.go.kr/eng/
Last updated: 2026-09-15 · This content is for information only and is not medical advice. Consult a qualified doctor before making treatment decisions.
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