What is Jeju Air's carry-on weight limit?

Jeju Air allows up to 15 kg for carry-on baggage on selected fares, which is unusually generous for a budget carrier in Asia. Standard fares include 10 kg. Always confirm your fare class when booking, as the allowance varies by ticket type.

Do I need a hire car on Jeju Island?

Yes. Jeju Island is 73 km across and has no meaningful intercity public transport for tourists. A hire car is the standard way to explore Hallasan, the lava tube caves, the west coast beaches, and the south coast. Book in advance during peak seasons such as October–November and July–August.

Can I fly carry-on only from Seoul to Jeju?

Yes. The Seoul GMP to Jeju CJU flight is under 1 hour and all three main carriers operate it. With Jeju Air's generous allowance on premium fares, or Korean Air and Jin Air at 10 kg, carry-on only is very practical for a short island trip.

What should I pack for hiking Hallasan volcano?

Hallasan requires layered clothing even in summer as the summit can be significantly cooler than sea level. Pack a windproof shell, moisture-wicking base layer, trail shoes with grip, trekking poles if hiking the longer Seongpanak route, and at least 1.5 litres of water. The hike takes 5 to 8 hours round trip.

Is Jeju Island worth visiting in winter?

Yes, but pack for 0 to 5°C with wind chill. Winter (December–February) brings fewer tourists, lower prices, and clear skies on good days. Mandarin orange season peaks October to November, which is the most popular time to visit. Summer is humid with temperatures around 28°C.

Carry-On Only for Jeju Island: Airlines, Packing & Island Essentials

Jeju Island is South Korea's most popular domestic destination — a volcanic island off the southern tip of the peninsula with a UNESCO-listed volcano, dramatic lava tube caves, white sand beaches, and a culture shaped by its haenyeo (female free-diving) tradition. The flight from Seoul Gimpo (GMP) takes under an hour, making it perfect for carry-on only travel. What makes Jeju particularly interesting for baggage planning is Jeju Air's unusually generous cabin allowance — one of the most passenger-friendly policies of any budget carrier in Asia.

Airline Quick Reference

Airline	Route	Cabin Allowance	Weight Limit
Jeju Air	Seoul GMP / ICN	1 cabin bag	10–15 kg (fare-dependent)
Korean Air	Seoul GMP, Busan	1 cabin bag	10 kg
Jin Air	Seoul GMP	1 cabin bag	10 kg
T'way Air	Seoul GMP	1 cabin bag	10 kg

Jeju Air's 15 kg carry-on allowance on certain fares is exceptional for Asia, where 7 kg is the regional standard for budget carriers. Korean Air and Jin Air are more conservative at 10 kg but still workable for a short island trip.

Airline Rules in Detail

Jeju Air is the dominant carrier on Seoul–Jeju routes and the island's home airline. On premium and higher fare buckets, the carry-on allowance rises to 15 kg — the most generous policy of any budget airline operating in Asia. Standard fares allow 10 kg. Jeju Air's enforcement at Gimpo is generally relaxed by Asian standards, though weight checks do occur.

Korean Air allows 10 kg in a single cabin bag. As a full-service carrier, Korean Air operates more spacious overhead bins on its narrow-body domestic fleet. Weight checks are standard at Korean Air check-in desks.

Jin Air (Korean Air's low-cost subsidiary) follows the same 10 kg limit as most Korean budget carriers. Fares are typically cheaper than Korean Air but pricier than Jeju Air.

What to Pack for Jeju Island

Summer (June–August)

Jeju summer is hot and humid at 26–30°C, with occasional typhoons in August. Pack lightweight moisture-wicking clothing, swimwear for Hamdeok and Hyeopjae beaches, and a compact rain jacket. Sun protection is important — UV is strong.

Autumn (October–November)

The best time to visit. Temperatures are 15–22°C, dry, and the mandarin orange groves are in harvest. A mid-layer fleece and light jacket are sufficient.

Winter (December–February)

Pack thermal layers, a warm outer layer, and waterproofing. Summit temperatures on Hallasan can drop below -10°C with wind chill. A compact down jacket compresses well and is worth the space.

For Hallasan Hiking

Trail shoes with grip (not sandals — the summit trails are rocky)
Trekking poles (collapsible, carry-on compliant)
Windproof shell jacket
Water (buy in Jeju City before the trailhead)
Snacks — no food sellers at the summit

Airport and Transport Tips

Jeju International Airport (CJU) is small and modern. Arrivals is quick — domestic flights have no baggage claim if you travel carry-on only. The airport is on the west side of Jeju City. Hire car desks are in the arrivals hall and in a nearby car park building. Book your hire car in advance: during Golden Week (early May), summer holidays, and the October mandarin season, hire cars sell out days ahead.

Getting around: Jeju requires a hire car. The island's public bus network exists but is slow and does not reach most natural attractions efficiently. International licence holders can drive with an International Driving Permit — South Korea accepts IDP alongside your home country licence.

Tips for Jeju Island

Buy small lava stone souvenirs. Jeju's black lava stone products — carvings, candle holders, small dolls — are iconic but heavy. Buy the smallest size that appeals to you. Large pieces will quickly eat into your carry-on weight.

Manjanggul Lava Tube Cave is a must. The cave requires a light jacket even in summer (it stays at around 11°C inside). The cave is 1 km of illuminated tunnel — flat and easy, no special footwear needed.

Haenyeo diving shows are culturally significant and worth seeing at Seongsan or the Haenyeo Museum near Sehwa. The divers free-dive to 10 metres without breathing equipment — a tradition that dates back over a thousand years.

Hyeopjae Beach on the west coast has unusually clear turquoise water for a beach at this latitude. It is less crowded than the east coast beaches near the airport and makes for a worthwhile half-day stop.

Hallasan summit access is restricted on bad weather days and the upper trail gates close at set times depending on the season. Check the Korea National Park Service website before your hike day.

The Bottom Line

Jeju Island is a natural carry-on destination: short flights from Seoul, a generous Jeju Air allowance, and no need for bulky checked luggage if you pack smart. The main packing challenge is the Hallasan hike, which needs proper footwear and layering that takes some space. Pack a compact mid-layer, trail shoes, and a waterproof shell and you will cover all of Jeju's activities — beach, cave, volcano, and culture — from a single carry-on bag.

Rules change — always verify with your airline before you fly.