South Korea Travel Checklist: What to Book and When

For South Korea travel, book KTX two months out, the Hallasan summit about a month out, the Secret Garden six days out, and file the e-Arrival Card three days out. Every window below comes from an official page we opened on 12 October 2026, or from one of our own guides, and each line says which. For the rules on entry itself, see our entry guide.

The calendar at a glance

We found no official booking window for flights or hotels. We do not give one.

Two months out: KTX

Booking: Since 1 Oct 2026, KTX tickets go on sale at 07:00 Korea time, two months before the train. It was one month before (Korail English ticketing guide, read 12 Oct 2026; Korail press release, 8 Oct 2026)

Note: Our calculation, not Korail's: 07:00 in Korea is 15:00 the day before in US Pacific time while daylight saving is on, and 14:00 after it ends on 1 Nov 2026

Booking: Holiday trains have their own sale dates. Seollal 2027 is on 7 February, with the holiday on 6 to 9 February. We found no Korail sale dates for it yet (our holiday guide, 11 Oct 2026)

Our booking guide has the steps and what to try if a card fails.

About a month out: Hallasan and the Sky Capsule

Booking: Hallasan: only the summit sections of the Seongpanak and Gwaneumsa trails need a booking. A booking covers up to 4 people (Hallasan National Park Office notice, 24 Apr 2025, read 11 Oct 2026)

Booking: Sky Capsule, Busan: the official site often rejects foreign cards, so a 2026 guide says to book 2 to 3 weeks ahead (our Busan guide, 9 Oct 2026)

Days out: the DMZ and the Secret Garden

Booking: DMZ: VisitKorea says the Third Tunnel and the Dora Observatory need a reservation, and the observatory is reached only on the DMZ Peace Tour. We found no official lead time, so check your operator's page and bring your passport (VisitKorea, read 11 Oct 2026)

Booking: Secret Garden: online booking runs from 10:00 six days before the visit to the day before, first come first served. Each tour holds 100 people, 50 booked online and 50 sold at the ticket office on the day. Late arrival means no entry and no refund (Royal Palaces and Tombs Center, Korean reservation page and English fee page, read 12 Oct 2026)

Note: Our calculation, not the palace's: 10:00 in Korea is 18:00 the day before in US Pacific time while daylight saving is on, and 17:00 after 1 Nov 2026

The Secret Garden is not free in the 29 October to 15 November window. Its tour is excluded from the free entry.

Three days out: entry paperwork

Booking: e-Arrival Card: free, filed online at e-arrivalcard.go.kr from 3 days before arrival, based on Korean Standard Time (official e-Arrival Card guide, read 15 Oct 2026)

Price: K-ETA: ₩10,000, about $7 to $8, and review is generally within 72 hours (k-eta.go.kr, read 12 Oct 2026). Americans are waived through 31 December 2026, and we found no 2027 decision on that date

If your trip crosses 1 January 2027, check k-eta.go.kr again and apply early. Never pay another site.

Is Korea crowded? The 2026 numbers

Korea is busier than ever, but you do not need to book most things.

Note: Jan to Aug 2026: 15,048,435 foreign visitors, up 21.6% from 12,379,498 in the same months of 2025. August 2026 alone: 2.25 million, up 23.3% (Ministry of Culture, Sports and Tourism, released 28 Sep 2026)

Note: By market, Jan to Aug 2026: Greater China 7,005,163 (up 28.9%), Japan 2,698,857 (up 17.5%), and the group of Americas, Europe and Oceania 2,689,307 (up 15.2%). The US is not listed on its own (same release)

Note: 27.8% of visitors entered through regional airports and seaports in Jan to Aug 2026, the highest share this year (same release)

These are counts of arrivals for the whole country. They do not say how many people stand in line at a given place. We found no official queue data. So treat the advice on this page as planning advice, not a forecast.

The palaces: busy, but still walk-up

Note: About 17.81 million people visited the four major palaces, Jongmyo Shrine and the royal tombs in 2025, and roughly 69% entered free. These counts include Korean visitors (Korea Heritage Service, in the Korea Times, 8 Oct 2026)

Price: Adult entry: ₩3,000 at Gyeongbokgung and Changdeokgung. ₩1,000 at Changgyeonggung, Deoksugung and Jongmyo (Korea Heritage Service, in the Korea Times, 8 Oct 2026)

Note: Fee plan: the service said on 8 Oct 2026 that it has not decided whether to raise fees. An earlier plan was for January 2027. A proposal under study is ₩5,000 for the palaces. It is also reviewing free entry for visitors wearing hanbok

Our 3-day Seoul guide says to reach Gyeongbokgung for the 9 a.m. opening, before the tour buses.

Two more to book: restaurants and hanbok

Booking: Popular restaurants: most use CatchTable, whose Global app works in English with a foreign card, or Naver (our Culinary Class Wars guide, checked 9 Oct 2026)

Price: Hanbok: rental is about ₩15,000 to ₩30,000 for four hours. Palace entry is free in hanbok today, but the Korea Heritage Service is reviewing that rule (Korea Times, 8 Oct 2026). Book a time slot only if you want one, and check the rule before you rent

Walk into these

Note: Suwon Hwaseong: subway Line 1 from Seoul Station, about an hour. The fortress wall is free and needs no tour (our day trips guide, checked 9 Oct 2026)

Note: Nami Island: no booking. Go on a weekday, because a weekend ferry queue can take a large part of the day (our day trips guide)

Note: Meals alone: our solo dining guide says a party of one is often seated before a party of four at one-bowl houses and market benches

A weekday and an early start help more than a booking for most of these places. That is our view from our guides, not a measured count.

What needs no booking

Most palace visits need none. From 29 October to 15 November 2026, the four palaces are free. Nami Island and Suwon Hwaseong need none either (our day trips guide, 9 Oct 2026).

What is checked here and what is not

Checked on 11 October 2026: the arrival counts and the regional entry share (the Ministry of Culture, Sports and Tourism release of 28 September 2026), and the palace fee and hanbok review (the Korea Times report of 8 October 2026 on the Korea Heritage Service).

Checked on 12 October 2026: Korail's English ticketing guide, the Royal Palaces and Tombs Center's Korean reservation page for Changdeokgung and its English fee page, and the K-ETA application page. Everything else is from our own guides, with the dates shown, and was not re-read today.

Not checked: any official queue or crowd data, the hanbok shops' current prices, any booking window for flights and hotels, DMZ operator lead times, the Hallasan opening day in the live system, concert presale dates, and the Secret Garden's English tour times on the booking screen. We did not book anything.