• Sign in
Privacy Preferences
United Kingdom (English)
English

Cheap flights from Seoul Gimpo Intl Airport to Jeju City from £12

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/3. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
GMP — CJU
27 Feb — 5 Mar1
1 adult
Tue 27/2
Tue 5/3

The best prices from Seoul Gimpo Intl to Jeju City are usually found in March or November, booked 35 days in advance, depart on a Tuesday or Monday and return on a Monday

What is the cheapest day to fly round-trip from Seoul Gimpo Intl Airport to Jeju City?

Thursday flights are generally found to be more expensive for flights from Seoul Gimpo Intl Airport to Jeju City. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Jeju City.

How far in advance should I book a flight from Seoul Gimpo Intl Airport to Jeju City?

Users have found that booking a flight from Seoul Gimpo Intl Airport to Jeju City at least 36 days early can save you up to 15% on average compared to booking a flight this week. If booking 36 days before your flight isn’t an option for you, users have found flights from Seoul Gimpo Intl Airport to Jeju City for as little as £70 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as £70 for flights departing within the next 3 days.

What is the cheapest month to fly from Seoul Gimpo Intl Airport to Jeju City?

Our data shows that March tends to be the cheapest month to fly to Jeju City from Seoul Gimpo Intl Airport. Users have commonly found prices around £72 for the month, but tickets can be as low as £32. Due to multiple factors, prepare for potentially higher prices in April.

When is the cheapest time to fly from Seoul Gimpo Intl Airport to Jeju City (GMP - CJU)?

When flying from Seoul Gimpo Intl Airport to Jeju City, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 22% versus a flight at midday.

Cheap T'way Air flights from Seoul to Jeju City

Explore cheap flight options specifically provided by T'way Air for the route between Seoul and Jeju City. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 920,304 searches. Data last updated 23 February 2024.
Find some of the cheapest T'way Air flights travelling from Seoul to Jeju City. Come back soon if you're not finding the exact deal you're looking for.
Mon 24/618:10GMP - CJU
Nonstop1h 10mT'way Air
Thu 27/608:45CJU - GMP
Nonstop1h 10mT'way Air
Deal found 21/2£36
Tue 16/419:00GMP - CJU
Nonstop1h 10mT'way Air
Thu 18/407:55CJU - GMP
Nonstop1h 10mT'way Air
Deal found 22/2£40
Tue 18/618:10GMP - CJU
Nonstop1h 10mT'way Air
Sat 22/608:45CJU - GMP
Nonstop1h 10mT'way Air
Deal found 22/2£41
Tue 27/218:45GMP - CJU
Nonstop1h 10mT'way Air
Tue 5/307:55CJU - GMP
Nonstop1h 10mT'way Air
Deal found 22/2£42
Mon 20/518:10GMP - CJU
Nonstop1h 10mT'way Air
Thu 23/508:45CJU - GMP
Nonstop1h 10mT'way Air
Deal found 21/2£43
Thu 21/317:25GMP - CJU
Nonstop1h 10mT'way Air
Thu 21/321:05CJU - GMP
Nonstop1h 10mT'way Air
Deal found 22/2£48
Sun 19/518:25GMP - CJU
Nonstop1h 10mT'way Air
Thu 23/507:55CJU - GMP
Nonstop1h 10mT'way Air
Deal found 21/2£50
Fri 8/318:45GMP - CJU
Nonstop1h 10mT'way Air
Fri 22/307:55CJU - GMP
Nonstop1h 10mT'way Air
Deal found 21/2£52
Wed 24/418:25GMP - CJU
Nonstop1h 10mT'way Air
Tue 30/407:55CJU - GMP
Nonstop1h 10mT'way Air
Deal found 22/2£53
  • T'way Air is one of the most popular airlines used for those travelling from Seoul Gimpo Intl Airport to Jeju City. Seoul Gimpo Intl Airport to Jeju City flights are typically 38% more expensive than other airlines travelling the same route. Flights from T'way Air typically cost £92.77 RT. The cheapest T'way Air flight found for this route was £65. Seoul Gimpo Intl Airport is the most common Seoul Gimpo Intl Airport airport to take off from when flying to Jeju City. Jeju City Airport is the most popular arrival airport in Jeju City. When flying from Seoul Gimpo Intl Airport to Jeju City, T'way Air flights are 6% more popular than any other airline flying that same route.

Cheap Jin Air flights from Seoul to Jeju City

Explore cheap flight options specifically provided by Jin Air for the route between Seoul and Jeju City. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 920,304 searches. Data last updated 23 February 2024.
Have a look at some of the cheapest available Jin Air flights departing from Seoul and landing in Jeju City. If these deals don't fit your criteria, make sure to check back soon as new deals are always added.
Mon 4/319:55GMP - CJU
Nonstop1h 10mJin Air
Wed 6/307:50CJU - GMP
Nonstop1h 15mJin Air
Deal found 22/2£24
Mon 4/319:55GMP - CJU
Nonstop1h 10mJin Air
Wed 6/307:50CJU - GMP
Nonstop1h 15mJin Air
Deal found 21/2£24
Sun 3/306:05GMP - CJU
Nonstop1h 10mJin Air
Wed 6/307:50CJU - GMP
Nonstop1h 15mJin Air
Deal found 22/2£27
Sun 3/306:05GMP - CJU
Nonstop1h 10mJin Air
Wed 6/307:50CJU - GMP
Nonstop1h 15mJin Air
Deal found 22/2£28
Tue 5/320:25GMP - CJU
Nonstop1h 10mJin Air
Fri 8/307:50CJU - GMP
Nonstop1h 15mJin Air
Deal found 22/2£28
Wed 13/306:05GMP - CJU
Nonstop1h 10mJin Air
Fri 15/307:50CJU - GMP
Nonstop1h 15mJin Air
Deal found 21/2£29
Wed 20/320:25GMP - CJU
Nonstop1h 10mJin Air
Fri 22/307:50CJU - GMP
Nonstop1h 15mJin Air
Deal found 21/2£39
Tue 26/320:25GMP - CJU
Nonstop1h 10mJin Air
Fri 29/307:50CJU - GMP
Nonstop1h 15mJin Air
Deal found 22/2£42
Sun 3/306:05GMP - CJU
Nonstop1h 10mJin Air
Sun 10/307:50CJU - GMP
Nonstop1h 15mJin Air
Deal found 22/2£45
  • If you’re travelling from Seoul Gimpo Intl Airport to Jeju City, one of the more common airlines travelling that route is Jin Air. Seoul Gimpo Intl Airport to Jeju City flights are typically 18% more expensive than other airlines travelling the same route. Flights from Jin Air typically cost £130.19 RT. The cheapest Jin Air flight found for this route was £55. Seoul Gimpo Intl Airport is the most common Seoul Gimpo Intl Airport airport to take off from when flying to Jeju City. Jeju City Airport is the most popular arrival airport in Jeju City. When flying from Seoul Gimpo Intl Airport to Jeju City, Jin Air flights are 5% more popular than any other airline flying that same route.

Cheap Seoul to Jeju City flights in February & March 2024

Find cheap flight options from Seoul to Jeju City specifically for the months of February and March 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 920,304 searches. Prices were last updated on 23 February 2024.
Check out some of the best flight deals from Seoul to Jeju City in 2024. More deals are always being added, so be sure to check back regularly.
Mon 4/319:55GMP - CJU
Nonstop1h 10mJin Air
Wed 6/307:50CJU - GMP
Nonstop1h 15mJin Air
Deal found 22/2£24
Mon 4/319:55GMP - CJU
Nonstop1h 10mJin Air
Thu 7/311:45CJU - GMP
Nonstop1h 10mJin Air
Deal found 22/2£27
Sun 3/306:05GMP - CJU
Nonstop1h 10mJin Air
Wed 6/307:50CJU - GMP
Nonstop1h 15mJin Air
Deal found 22/2£28
Tue 5/320:25GMP - CJU
Nonstop1h 10mJin Air
Fri 8/307:50CJU - GMP
Nonstop1h 15mJin Air
Deal found 22/2£28
Tue 5/320:25GMP - CJU
Nonstop1h 10mJin Air
Tue 12/307:50CJU - GMP
Nonstop1h 15mJin Air
Deal found 22/2£29
Mon 4/319:55GMP - CJU
Nonstop1h 10mJin Air
Sat 9/307:50CJU - GMP
Nonstop1h 15mJin Air
Deal found 22/2£33
Wed 6/306:05GMP - CJU
Nonstop1h 10mJin Air
Sat 9/307:50CJU - GMP
Nonstop1h 15mJin Air
Deal found 22/2£34
Tue 12/314:50GMP - CJU
Nonstop1h 10mAsiana Airlines
Thu 14/311:45CJU - GMP
Nonstop1h 10mAsiana Airlines
Deal found 22/2£36
Mon 18/318:35GMP - CJU
Nonstop1h 10mAsiana Airlines
Thu 21/309:00CJU - GMP
Nonstop1h 10mAsiana Airlines
Deal found 22/2£37

Seoul to Jeju City 2024 flight deals

Discover exclusive flight deals for travel between Seoul and Jeju City in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 920,304 searches. Data last updated 23 February 2024.
Check out some of the best flight deals from Seoul to Jeju City in 2024. More deals are always being added, so be sure to check back regularly.
Mon 4/319:55GMP - CJU
Nonstop1h 10mJin Air
Wed 6/307:50CJU - GMP
Nonstop1h 15mJin Air
Deal found 22/2£24
Mon 4/319:55GMP - CJU
Nonstop1h 10mJin Air
Thu 7/311:45CJU - GMP
Nonstop1h 10mJin Air
Deal found 22/2£27
Sun 3/306:05GMP - CJU
Nonstop1h 10mJin Air
Wed 6/307:50CJU - GMP
Nonstop1h 15mJin Air
Deal found 22/2£28
Tue 5/320:25GMP - CJU
Nonstop1h 10mJin Air
Fri 8/307:50CJU - GMP
Nonstop1h 15mJin Air
Deal found 22/2£28
Tue 5/320:25GMP - CJU
Nonstop1h 10mJin Air
Tue 12/307:50CJU - GMP
Nonstop1h 15mJin Air
Deal found 22/2£29
Mon 4/319:55GMP - CJU
Nonstop1h 10mJin Air
Sat 9/307:50CJU - GMP
Nonstop1h 15mJin Air
Deal found 22/2£33
Wed 6/306:05GMP - CJU
Nonstop1h 10mJin Air
Sat 9/307:50CJU - GMP
Nonstop1h 15mJin Air
Deal found 22/2£34
Tue 12/314:50GMP - CJU
Nonstop1h 10mAsiana Airlines
Thu 14/311:45CJU - GMP
Nonstop1h 10mAsiana Airlines
Deal found 22/2£36
Mon 18/318:35GMP - CJU
Nonstop1h 10mAsiana Airlines
Thu 21/309:00CJU - GMP
Nonstop1h 10mAsiana Airlines
Deal found 22/2£37

Direct flights to Jeju City from Seoul

Discover direct flight options from Seoul to Jeju City. Find direct flights with no stopovers, providing a convenient travel experience. Explore direct flight options based on user searches, and compare prices and availability for your desired travel dates. Over the last 7 days, Cheapflights users made 920,304 searches. Data last updated 23 February 2024.
Take a look at some of the direct flights travelling from Seoul to Jeju City in the near future. Select from other flights from Seoul to Jeju City by using the search form above.
Mon 4/319:55GMP - CJU
Nonstop1h 10mJin Air
Wed 6/307:50CJU - GMP
Nonstop1h 15mJin Air
Deal found 21/2£24
Mon 4/319:55GMP - CJU
Nonstop1h 10mJin Air
Thu 7/311:45CJU - GMP
Nonstop1h 10mJin Air
Deal found 22/2£27
Tue 5/320:25GMP - CJU
Nonstop1h 10mJin Air
Fri 8/307:50CJU - GMP
Nonstop1h 15mJin Air
Deal found 22/2£28
Wed 13/306:05GMP - CJU
Nonstop1h 10mJin Air
Fri 15/307:50CJU - GMP
Nonstop1h 15mJin Air
Deal found 21/2£29
Tue 5/314:50GMP - CJU
Nonstop1h 10mAsiana Airlines
Thu 7/309:05CJU - GMP
Nonstop1h 15mAsiana Airlines
Deal found 21/2£33
Mon 24/618:10GMP - CJU
Nonstop1h 10mT'way Air
Thu 27/608:45CJU - GMP
Nonstop1h 10mT'way Air
Deal found 21/2£36
Wed 6/313:15GMP - CJU
Nonstop1h 10mAsiana Airlines
Tue 12/309:05CJU - GMP
Nonstop1h 15mAsiana Airlines
Deal found 20/2£37
Sun 3/306:20GMP - CJU
Nonstop1h 10mAsiana Airlines
Wed 27/309:40CJU - GMP
Nonstop1h 10mAsiana Airlines
Deal found 22/2£38
Wed 20/320:25GMP - CJU
Nonstop1h 10mJin Air
Fri 22/307:50CJU - GMP
Nonstop1h 15mJin Air
Deal found 21/2£39

Seoul to Jeju City flights leaving soon

Find last-minute flight options from Seoul to Jeju City for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 920,304 searches. Data last updated 23 February 2024.
Have a look at some of the flights available from Seoul to Jeju City departing last-minute. It's wise to confirm all flight details are correct before booking.
Sun 3/306:05GMP - CJU
Nonstop1h 10mJin Air
Wed 6/307:50CJU - GMP
Nonstop1h 15mJin Air
Deal found 22/2£27
Sun 3/306:05GMP - CJU
Nonstop1h 10mJin Air
Wed 6/307:50CJU - GMP
Nonstop1h 15mJin Air
Deal found 22/2£28
Sun 3/306:20GMP - CJU
Nonstop1h 10mAsiana Airlines
Thu 28/309:05CJU - GMP
Nonstop1h 15mAsiana Airlines
Deal found 22/2£38
Sat 2/314:50GMP - CJU
Nonstop1h 10mAsiana Airlines
Wed 27/309:05CJU - GMP
Nonstop1h 15mAsiana Airlines
Deal found 22/2£40
Sun 3/306:20GMP - CJU
Nonstop1h 10mAsiana Airlines
Tue 26/309:40CJU - GMP
Nonstop1h 10mAsiana Airlines
Deal found 22/2£40
Tue 27/218:45GMP - CJU
Nonstop1h 10mT'way Air
Tue 5/307:55CJU - GMP
Nonstop1h 10mT'way Air
Deal found 22/2£42
Fri 1/320:30GMP - CJU
Nonstop1h 10mJeju Air
Fri 8/307:40CJU - GMP
Nonstop1h 10mJeju Air
Deal found 22/2£43
Sun 3/306:05GMP - CJU
Nonstop1h 10mJin Air
Sun 10/307:50CJU - GMP
Nonstop1h 15mJin Air
Deal found 22/2£45
Sun 3/306:20GMP - CJU
Nonstop1h 10mAsiana Airlines
Fri 29/309:05CJU - GMP
Nonstop1h 15mAsiana Airlines
Deal found 22/2£46

One-way flights to Jeju City from Seoul

Search for one-way flight options from Seoul to Jeju City. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 920,304 searches. Data last updated 23 February 2024.
Some of the best available deals we've found on one-way flights from Seoul to Jeju City. Those seeking round-trip flights from Seoul to Jeju City should utilise the search form at the top of the page.
Mon 4/319:55GMP - CJU
Nonstop1h 10mJin Air
Deal found 21/2£12
Sun 3/306:05GMP - CJU
Nonstop1h 10mJin Air
Deal found 22/2£14
Sat 2/313:30GMP - CJU
Nonstop1h 15mJin Air
Deal found 21/2£17
Wed 20/318:35GMP - CJU
Nonstop1h 10mAsiana Airlines
Deal found 22/2£17
Tue 21/518:15GMP - CJU
Nonstop1h 10mJeju Air
Deal found 21/2£18
Mon 25/319:55GMP - CJU
Nonstop1h 10mJin Air
Deal found 21/2£19
Sat 16/319:55GMP - CJU
Nonstop1h 10mJin Air
Deal found 21/2£21
Mon 15/417:50GMP - CJU
Nonstop1h 10mAsiana Airlines
Deal found 21/2£22
Mon 15/418:25GMP - CJU
Nonstop1h 10mAsiana Airlines
Deal found 22/2£23

Find flights from Seoul to Jeju City within your budget

Customise your flight search to find flights from Seoul to Jeju City that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 920,304 searches. Data last updated 23 February 2024.

Fly from

Any airport

Fly to

Any airport

Budget

£24 - £56

Route

Depart

Return

Price

Seoul Gimpo IntlJeju City

GMP - CJU

GMPCJU

Seoul Gimpo Intl

Mon 4/3

Nonstop1h 10m

Jeju City

Wed 6/3

Nonstop1h 15m

£24

Seoul Gimpo IntlJeju City

GMP - CJU

GMPCJU

Seoul Gimpo Intl

Mon 4/3

Nonstop1h 10m

Jeju City

Wed 6/3

Nonstop1h 15m

£24

Seoul Gimpo IntlJeju City

GMP - CJU

GMPCJU

Seoul Gimpo Intl

Mon 4/3

Nonstop1h 10m

Jeju City

Thu 7/3

Nonstop1h 10m

£27

Seoul Gimpo IntlJeju City

GMP - CJU

GMPCJU

Seoul Gimpo Intl

Tue 5/3

Nonstop1h 10m

Jeju City

Fri 8/3

Nonstop1h 15m

£28

Seoul Gimpo IntlJeju City

GMP - CJU

GMPCJU

Seoul Gimpo Intl

Tue 5/3

Nonstop1h 10m

Jeju City

Thu 7/3

Nonstop1h 15m

£33

Seoul Gimpo IntlJeju City

GMP - CJU

GMPCJU

Seoul Gimpo Intl

Mon 24/6

Nonstop1h 10m

Jeju City

Thu 27/6

Nonstop1h 10m

£36

Seoul Gimpo IntlJeju City

GMP - CJU

GMPCJU

Seoul Gimpo Intl

Wed 6/3

Nonstop1h 10m

Jeju City

Thu 28/3

Nonstop1h 10m

£37

Seoul Gimpo IntlJeju City

GMP - CJU

GMPCJU

Seoul Gimpo Intl

Sun 30/6

Nonstop1h 10m

Jeju City

Wed 3/7

Nonstop1h 10m

£44

Seoul Gimpo IntlJeju City

GMP - CJU

GMPCJU

Seoul Gimpo Intl

Sun 14/4

Nonstop1h 10m

Jeju City

Wed 17/4

Nonstop1h 10m

£56

Flights are sorted by cheapest first

Deals found on 22/2

When is the best time to book a flight from Seoul Gimpo Intl Airport to Jeju City?

Use this chart to determine the optimal time to book a return flight from Seoul to Jeju City. Price data was last updated on 28 January 2024.
Booking 35 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seoul Gimpo Intl Airport to Jeju City. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
Search Deals

When is the cheapest time to fly from Seoul Gimpo Intl Airport to Jeju City?

Use this chart to determine the cheapest time to fly return from Seoul to Jeju City. Price data was last updated on 18 February 2024.
Morning
Midday
Afternoon
Evening
All times are departure.
Travellers seeking maximum savings on their Seoul Gimpo Intl Airport to Jeju City flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Friday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Reviews of airlines servicing Jeju City

Get insights into the airlines that provide service to Jeju City. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Jeju City. Reviews last updated 23 February 2024.
Get a feel of what it's like to fly with T'way Air, Jin Air and Asiana Airlines from Seoul to Jeju City by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
8.5
Very Good
1,260 reviews

Food

8.2

Entertainment

8.2

Boarding

8.6

Overall

8.5

Comfort

8.3

Crew

8.8

Reviews

1 / 10

if you can put more multiples language agents in air service especially Chinese or French ,the customer who speaks those languages will be much happier than now

8.5
Very Good
1,260 reviews
8.5
Very Good
1,260 reviews

Food

8.2

Entertainment

8.2

Boarding

8.6

Overall

8.5

Comfort

8.3

Crew

8.8

Reviews

1 / 10

if you can put more multiples language agents in air service especially Chinese or French ,the customer who speaks those languages will be much happier than now

8.5
Very Good
679 reviews
8.5
Very Good
1,260 reviews

Food

8.2

Entertainment

8.2

Boarding

8.6

Overall

8.5

Comfort

8.3

Crew

8.8

Reviews

1 / 10

if you can put more multiples language agents in air service especially Chinese or French ,the customer who speaks those languages will be much happier than now

Related info for your journey

Find useful and relevant information for your journey from Seoul to Jeju City. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airports do I use to fly from Seoul to Jeju City?

To fly from Seoul to Jeju City, you need to book a flight from Gimpo Intl (GMP) to Jeju (CJU). Nonstop flights to Jeju City from Seoul Gimpo Intl take 1h 00m on average. When it comes time to book airfare, you have a few options: there are 135 outbound flights from Gimpo Intl to Jeju offered by 5 different airlines.

Can I find flights from Seoul Gimpo Intl Airport to Jeju City for under £100 on Cheapflights?

Yes, there are multiple flights from Seoul Gimpo Intl Airport to Jeju City for under £100. The cheapest flight booked recently is on Jin Air for just £24, but on average you can expect to pay £37.

Are there nonstop flights from Seoul Gimpo Intl Airport to Jeju City for under £100 on Cheapflights?

Cheapflights has at least 20 direct flights from Seoul Gimpo Intl Airport to Jeju City under £100. A good price for a nonstop flight from Seoul Gimpo Intl Airport to Jeju City is less than £38.

Are there last-minute flights available from Seoul Gimpo Intl Airport to Jeju City for under £100?

There are currently 20+ open flights from Seoul Gimpo Intl Airport to Jeju City within the next 7 days for less than £100.

What days are direct flights available from Seoul Gimpo Intl Airport to Jeju City?

Days when direct flights are available for this flight are: Sunday, Monday, Thursday, Friday, Saturday.

How many flights depart from Seoul Gimpo Intl Airport to Jeju City on average per day?

On average 13 flights depart from Seoul Gimpo Intl Airport to Jeju City per day.
Early Morning (Midnight to 6am) - 15% of flight departures
Morning (6am - Midday) - 23% of flight departures
Afternoon (Midday - 6pm) - 38% of flight departures
Evening (6pm - Midnight) - 23% of flight departures

How long is the flight from Seoul Gimpo Intl Airport to Jeju City?

Airlines like Jin Air, Asiana Airlines, and T'way Air fly from Seoul Gimpo Intl Airport to Jeju City in about 1h 10m. The time it takes to get you to your destination is usually consistent. There are 281 mi between Seoul Gimpo Intl Airport and Jeju City. Most flights are nonstop.

What are the cheapest airlines flying from Seoul Gimpo Intl Airport to Jeju City round-trip?

Jin Air, at £24, was found to be the cheapest airline from Seoul Gimpo Intl Airport to Jeju City.Alternate airlines flying return to your destination include Asiana Airlines and T'way Air. You may be able to fly from Seoul Gimpo Intl Airport to Jeju City for 68% less than the average pr