Ferries run from Seongsan Port to Udo 20+ times a day, roughly every 30 minutes, taking about 15 minutes to cross, and the last return ferry is around 17:00–18:30 depending on season.
Missing the last return means no same-day trip back, and rough weather cancels sailings outright.
This post covers the schedule, the last ferry, fares, ID and boarding rules, booking, and how to get around Udo once you land.
Udo Island Jeju Ferry: When Is the Last Return?
| Departure port | Seongsanpo Passenger Terminal (Seongsan Port); Jongdal Port as a second option |
|---|---|
| Frequency | 20+ sailings a day, every 30 minutes to 1 hour |
| Crossing time | About 15 minutes |
| Arrival ports | On the hour → Haumokdong Port; at :30 → Cheonjin Port |
| Last return ferry | Roughly 17:00–18:30 depending on season — confirm by phone (064-782-5671) on the day |
| ID | Physical ID for every passenger; boarding declaration form filled out for each direction |
| Day status check | 064-782-5671 (weather cancellations are common) |
The last return ferry from Udo to Seongsan falls in a range of roughly 17:00–18:30 depending on the season, with winter running earlier — around 16:00–16:30.
No single fixed cutoff time appears across the sources, so this is the one number you should confirm on the day.
The status-check phone number is 064-782-5671.
The range is wide because the timetable shifts by month, and sailings are frequently cancelled or shortened in bad weather.
If you arrive at Seongsan Port at 17:30 for a day trip, the last return may already be gone depending on the season.
If a same-day return is essential, leave Udo with a large buffer before the listed last sailing, and call 064-782-5671 that morning.
If you miss the last ferry, there is no same-day way back.
How Often Does the Udo Ferry Run and How Long Does It Take?
More than 20 sailings a day leave Seongsan Port at intervals of 30 minutes to 1 hour, and the crossing takes about 15 minutes.
The two departure times send you to different harbors on Udo: ferries leaving on the hour dock at Haumokdong Port, and ferries leaving at :30 dock at Cheonjin Port.
In the May–August schedule, operations run roughly 07:00–18:30.
The route is operated by Jeju Marine Transport.
Because the two ports are on different sides of the island, your arrival port changes where you start the day — check which one your sailing uses before deciding where to rent a car or meet a bus.
How Much Does the Udo Ferry Cost Round Trip?
The sources disagree on the adult round-trip fare — ₩8,500, ₩10,500 including park entry, and ₩15,000 all appear — and no official operator fare page was confirmed, so there is no single number to state as the official price.
| Source | Adult round trip | Adult one-way |
|---|---|---|
| 2025 Seongsan route source | ₩10,500 (incl. park entry) | ₩6,000 |
| 2024 source | ₩15,000 | — |
| Another source | ₩8,500 | ₩7,500 |
| Jongdal Port (2025) | ₩11,500 | — |
The 2025 Seongsan route source also lists elementary one-way around ₩2,300 and round trip ₩3,800, with infant (24mo+) ₩1,500 one-way and ₩3,000 round trip.
Check the booth price on the day — the numbers above are what each source listed, not a confirmed operator fare.
Do I Need a Passport for the Udo Ferry?
Every passenger shows a physical ID to board, and for foreign visitors that means a passport or an Alien Registration Card (ARC).
All passengers also fill out a boarding declaration form for each direction of travel.
The form asks for your name, birthdate, and phone number, and you complete it twice — once before the outbound ferry and once before the return.
At Seongsanpo Passenger Terminal, tickets are purchased on-site: fill in the declaration form before joining the ticket booth line.
Note that the passport-or-ARC rule for foreigners comes from a single secondary source, while the general ID requirement itself is confirmed by multiple sources.
Bring the physical card or booklet, not a photo of it on your phone, and keep it with you for the return leg as well.
Can You Book the Udo Ferry Online?
The sources contradict each other: one describes online booking through the Jeju Marine Transport website, and another says tickets are sold on-site only at the terminal.
Since there is no confirmed official answer, plan as if you buy the ticket on-site.
If online booking does turn out to be available, the described steps are: visit the Jeju Marine Transport site, sign up, select the date, select the time, enter passenger information, pay, and save the confirmation.
One source also suggests a booking window of about 2 weeks ahead in July–August, 1 week in May–June and September–October, and 2–3 days in the off-season.
Whichever way it goes, the boarding declaration form is done in person either way, so arriving 20–30 minutes before departure in peak season is the part you control.
Getting Around Udo Once You Land
Udo is small enough to walk around in 3–4 hours without stops, but most visitors rent a small electric car or take the coastal circular bus.
A 2-seater electric car rents from ₩25,000 for about 4.5 hours, and the driver needs a license and must be between 21 and 65 years old, with restrictions for pregnancy, weight over 85 kg, and height over 185 cm.
The circular bus sells a one-loop pass covering 27 stops — including Udobong, Seobin Beach, and Hongjodangoe Beach — at ₩5,000 for adults and ₩3,000 for children, with the first departure around 08:00.
Main sights include Seobin Baeksa beach, Gommele Beach, Udobong, Hongjodanoe Beach, and Hagosudong Beach.
If I were planning this, I would aim for the first ferry in peak season — it puts the whole island ahead of you instead of behind you, and the return options stay wide open.
The e-car suits visitors who want to stop freely, and the one-loop bus pass suits anyone staying near the ferry terminal between sailings.
Related posts
Sources
- Last return 17:30–18:30 summer; primary operator timetable p (33.personalemblem.com)
- Jongdal 6 fixed sailings, adult ₩11,500, free small parking (honeytiplab.com)
- frequency (0926-recent-transport-3.tistory.com)
Reader Situations and What to Do
- Peak season plan around the first ferry — the last return shifts to 16:00–16:30 in winter
- The 10:00–14:00 window is the busiest; arrive 20–30 minutes before departure
- Passport or ARC plus a boarding declaration form for each leg — one outbound, one return
- Jongdal Port has only 6 sailings a day but shorter queues than Seongsan
- Call 064-782-5671 the same morning before committing to a sail time
FAQ
Q. What time is the last ferry back from Udo?
The last return falls roughly between 17:00 and 18:30 depending on season, with winter around 16:00–16:30 — confirm by phone at 064-782-5671 on the day.
Q. How often does the Udo ferry run?
20+ sailings a day from Seongsan Port at 30-minute to 1-hour intervals, with a crossing time of about 15 minutes.
Q. What does the Udo ferry cost round trip?
Secondary sources conflict — ₩8,500, ₩10,500 including park entry, and ₩15,000 have all been listed for the adult round trip, and no official operator fare was confirmed, so verify before paying.
Q. What ID is required for foreign visitors on the Udo ferry?
A physical passport or ARC for every foreign passenger, plus a boarding declaration form filled out once for each direction of travel.
Q. Can the Udo ferry be booked online, or is it on-site only?
The sources contradict each other — one describes online booking via Jeju Marine Transport and another says on-site purchase only — so plan to buy at the terminal and complete the declaration form there.
Before your trip, write down two numbers: 064-782-5671 for same-day sailing status, and 064-728-1527 for the Udo Island Office.
Cover photo: AI-generated illustration (small passenger ferry) — AI-generated image, illustrative only
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