1 hr 10 min is the shortest flight time from Jeju-si to Seoul.

The cheapest days to fly are usually in September. Typical prices range from $45 to $120.

The best round-trip deal recently found on Google Flights from Jeju-si to Seoul was with Air Busan from $33. The best one-way deal was with T'Way Air from $15.

There are direct flights from Jeju-si to Seoul on a daily basis.

Korean Air, Asiana, Jeju Air, EASTAR JET, Jin Air, Air Busan and Air Seoul fly direct from Jeju-si to Seoul.

The cheapest round-trip flight from Jeju-si to Seoul starts at $33 from Thu, Jun 27 to Wed, Jul 3. The cheapest one-way flight starts at $15 and departs on Thu, Jul 4.

Some common times to visit Seoul are Mar–May (cherry blossom season) and Sep–Nov, when the weather is most temperate. Summers (Jun–Aug) are hot and humid, while winters (Dec–Feb) are cold and dry. Major local events include the Lotus Lantern Festival (May) and the Hi Seoul Festival, a seasonal cultural festival held 4 times a year.

It's easy to use Google Flights to find the cheapest days to fly from Jeju-si to Seoul.
Just click the Departure label near the top of the page to open the calendar. Choose a start date and a return date to see how the round-trip fare changes on those specific days.
Adjust the trip type to see one-way fares. The cheapest available flights are highlighted and easy to spot. Once you settle on dates, click the Search button to see flight options and book the deal.

You can also turn on price tracking to get alerts if the price changes for a route or flight.