Cheap flights from Seoul to Jeju from $18 GMP, ICN → CJU

Found recently, and the cheapest we hold

It is also the cheapest return we hold, of any age.

What have prices looked like?

Over 49 days, 24 Sept to 11 Nov, the cheapest return we saw each day was $29 to $44.

Those were the prices on those days, not today's.

Could nearby dates be cheaper?

No. We hold 2-night return fares on 3 other departure dates within 3 days of 24 Nov, and none is cheaper.

Every date we hold

576 fares on 107 departure dates

Which month looks cheapest?

November 2026 is the cheapest month — from $35.

Found recently, and the cheapest we hold

It is also the cheapest one-way we hold, of any age.

What have prices looked like?

Over 49 days, 24 Sept to 11 Nov, the cheapest one-way we saw each day was $12 to $20.

Those were the prices on those days, not today's.

Could nearby dates be cheaper?

No. We hold one-way fares on 6 other departure dates within 3 days of 17 Nov, and none is cheaper.

Every date we hold

381 fares on 122 departure dates

Which month looks cheapest?

November 2026 is the cheapest month — from $18.

Return

The cheapest fares were 0 to 6 days before departure.

From the cheapest return each day between 24 Sept and 11 Nov (49 days), grouped by how many days ahead the flight left; one adult in economy.

Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.

Prices reflect recent searches — current fares may differ.

One-way

The cheapest fares were 0 to 6 days before departure.

From the cheapest one-way each day between 24 Sept and 11 Nov (49 days), grouped by how many days ahead the flight left; one adult in economy.

Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.

Prices reflect recent searches — current fares may differ.

How much is a return flight from Seoul to Jeju?

The cheapest return found recently is $35 with Eastar Jet, 24 Nov to 26 Nov, found 2 days ago. The cheapest return fare on each of 107 departure dates is usually $66 to $187.

How much is a one-way flight from Seoul to Jeju?

The cheapest one-way found recently is $18 with Eastar Jet, 17 Nov, found 2 days ago. The cheapest one-way fare on each of 122 departure dates is usually $27 to $88.

What is the cheapest month to fly from Seoul to Jeju?

November 2026 is the cheapest month for a return, from $35, 24 Nov to 26 Nov, found 2 days ago. It is the cheapest month for a one-way too, from $18, 17 Nov, found 2 days ago.

Every date in November 2026

How far ahead should I book a flight from Seoul to Jeju?

In 49 days of prices between 24 Sept and 11 Nov, return and one-way fares were both cheapest 0 to 6 days before departure.

Is there a direct flight from Seoul to Jeju?

Yes, the cheapest nonstop return found recently is $35 with Eastar Jet, 24 Nov to 26 Nov, found 2 days ago. The cheapest nonstop one-way found recently is $18 with Eastar Jet, 17 Nov, found 2 days ago.

How long is the flight from Seoul to Jeju?

The cheapest nonstop one-way found recently, with Eastar Jet on 17 Nov, takes 1 h 15 min from Gimpo International Airport (GMP) to Jeju International Airport (CJU).

Which airlines have the cheapest flights from Seoul to Jeju?

Between 13 Nov and 5 Oct 2027, Korean Air has the cheapest return on 41 of the 107 departure dates we hold, Eastar Jet on 18 and Jeju Air on 17. Between 13 Nov and 30 Oct 2027, Korean Air has the cheapest one-way on 37 of the 122 departure dates we hold, Jeju Air on 30 and T'way Air on 19.