is by far the best month, wherein you can get cheapest flights for Cheju to Seoul. Meanwhile, is perceived as the expensive month due to the varying factors. That’s why it’s highly advised to make advanced online flight booking to save huge amounts of money.
Disclaimer - All the mentioned fares were found within last 48 hrs. The displayed fares are based on historical data and are subject to change. The fares cannot be guaranteed at the time of booking.

Kaohsiung
17:55
Kaohsiung International Airport [KHH]
Sat , 20 Jun 2026

Osaka
10:55
Kansai International Airport [KIX]
Sun, 21 Jun 2026

Seoul
10:20
Incheon International Airport [ICN]
Sat , 20 Jun 2026

Tokyo
12:55
Narita International Airport [NRT]
Sat, 20 Jun 2026

Seoul
15:00
Incheon International Airport [ICN]
Sat , 20 Jun 2026

Tokyo
17:40
Narita International Airport [NRT]
Sat, 20 Jun 2026

Singapore
23:00
Singapore Changi Airport [SIN]
Sat , 20 Jun 2026

Tokyo
12:55
Narita International Airport [NRT]
Sun, 21 Jun 2026

Danang
01:25
Da Nang International Airport [DAD]
Sat , 20 Jun 2026

Tokyo
12:55
Narita International Airport [NRT]
Sat, 20 Jun 2026

Danang
01:25
Da Nang International Airport [DAD]
Sat , 20 Jun 2026

Tokyo
17:40
Narita International Airport [NRT]
Sat, 20 Jun 2026

Paris
20:30
Charles de Gaulle International Airport [CDG]
Sat , 20 Jun 2026

Seoul
15:40
Incheon International Airport [ICN]
Sun, 21 Jun 2026

Paris
20:30
Charles de Gaulle International Airport [CDG]
Sat , 20 Jun 2026

Tokyo
12:55
Narita International Airport [NRT]
Mon, 22 Jun 2026

Singapore
23:00
Singapore Changi Airport [SIN]
Sat , 20 Jun 2026

Seoul
06:45
Incheon International Airport [ICN]
Sun, 21 Jun 2026

Hong Kong
13:15
Hong Kong International Airport [HKG]
Sat , 20 Jun 2026

Fiumicino
19:15
Fiumicino Leonardo Da Vinci International Airport [FCO]
Sun, 21 Jun 2026

Barcelona
21:00
Barcelona International Airport [BCN]
Sat , 20 Jun 2026

Tokyo
12:55
Narita International Airport [NRT]
Mon, 22 Jun 2026