| CJU–GMP | Jeju City – Seoul | 3,677 |
| FUK–ICN | Fukuoka – Seoul | 897 |
| CJJ–CJU | Cheongju – Jeju City | 774 |
| BKK–ICN | Bangkok – Seoul | 708 |
| DAD–ICN | Da Nang – Seoul | 689 |
| ICN–TAO | Seoul – Qingdao (Jiaozhou) | 627 |
| GMP–PUS | Seoul – Busan | 568 |
| CJU–TAE | Jeju City – Daegu | 563 |
| ICN–SIN | Seoul – Singapore | 560 |
| CXR–ICN | Nha Trang/nha Trang aiurportCam Ranh – Seoul | 527 |
| CJU–KWJ | Jeju City – Gwangju | 433 |
| CTS–ICN | Sapporo – Seoul | 378 |
| KIX–PUS | Osaka – Busan | 342 |
| FUK–PUS | Fukuoka – Busan | 332 |
| NRT–PUS | Narita – Busan | 284 |
| GUM–ICN | Hagåtña – Seoul | 237 |
| FRA–ICN | Frankfurt am Main – Seoul | 235 |
| ICN–SYD | Seoul – Sydney (Mascot) | 220 |
| ICN–UBN | Seoul – Ulaanbaatar (Sergelen) | 220 |
| CDG–ICN | Paris (Roissy-en-France, Val-d'Oise) – Seoul | 212 |
| CXR–PUS | Nha Trang/nha Trang aiurportCam Ranh – Busan | 210 |
| ICN–SHE | Seoul – Shenyang | 208 |
| ICN–YVR | Seoul – Vancouver | 207 |
| CGK–ICN | Jakarta – Seoul | 204 |
| ICN–OKA | Seoul – Naha | 204 |
| ICN–TNA | Seoul – Jinan (Licheng) | 187 |
| CJU–TPE | Jeju City – Taoyuan | 168 |
| ICN–KHH | Seoul – Kaohsiung (Xiaogang) | 138 |
| HKG–PUS | Hong Kong – Busan | 131 |
| FCO–ICN | Rome – Seoul | 128 |
| GUM–NRT | Hagåtña – Narita | 124 |
| ICN–RMQ | Seoul – Taichung (Qingshui) | 120 |
| CJJ–KIX | Cheongju – Osaka | 120 |
| KHH–PUS | Kaohsiung (Xiaogang) – Busan | 117 |
| BCN–ICN | Barcelona – Seoul | 97 |
| CJJ–FUK | Cheongju – Fukuoka | 91 |
| CJU–SIN | Jeju City – Singapore | 86 |
| ICN–KMJ | Seoul – Kumamoto | 85 |
| KIX–TAE | Osaka – Daegu | 78 |
| GMP–KHH | Seoul – Kaohsiung (Xiaogang) | 73 |
| CJJ–DAD | Cheongju – Da Nang | 69 |
| GMP–TSA | Seoul – Taipei (Songshan) | 68 |
| FUK–TAE | Fukuoka – Daegu | 61 |
| CJJ–CXR | Cheongju – Nha Trang/nha Trang aiurportCam Ranh | 56 |
| ICN–WUH | Seoul – Wuhan (Huangpi) | 56 |
| DYG–TAE | Zhangjiajie (Yongding) – Daegu | 56 |
| TAE–TPE | Daegu – Taoyuan | 48 |
| NRT–TAE | Narita – Daegu | 47 |
| ICN–KLO | Seoul – Kalibo | 46 |
| CJU–KHH | Jeju City – Kaohsiung (Xiaogang) | 40 |
| CJU–KIX | Jeju City – Osaka | 34 |
| BSZ–ICN | Bishkek – Seoul | 28 |
| CXR–TAE | Nha Trang/nha Trang aiurportCam Ranh – Daegu | 28 |
| DAD–TAE | Da Nang – Daegu | 27 |
| BKK–TAE | Bangkok – Daegu | 27 |
| HSG–ICN | Saga – Seoul | 26 |
| CJU–FUK | Jeju City – Fukuoka | 25 |
| CJU–MFM | Jeju City – Nossa Senhora do Carmo | 24 |
| CJJ–YNJ | Cheongju – Yanji | 24 |
| CJJ–DPS | Cheongju – Kuta, Badung | 16 |
| TAE–UBN | Daegu – Ulaanbaatar (Sergelen) | 14 |
| ANC–BFI | Anchorage – Seattle | 14 |
| TAE–YNJ | Daegu – Yanji | 12 |
| ICN–LYI | Seoul – Linyi (Hedong) | 7 |
| ICN–ZAG | Seoul – Velika Gorica | 6 |
| TAE–TFU | Daegu – Chengdu (Jianyang) | 5 |
| ANC–CTS | Anchorage – Sapporo | 4 |
| FUK–GUM | Fukuoka – Hagåtña | 3 |
| ICN–YCU | Seoul – Yuncheng (Yanhu) | 2 |
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