| Seoul (GMP) Gimpo International Airport | South Korea | 280 mi | ~1h 10m | Jeju Air, Korean Air, and EASTAR JET | 103-104/day |
| Busan (PUS) Gimhae International Airport | South Korea | 181 mi | ~57m | Air Busan, Jeju Air, and Korean Air | 29/day |
| Cheongju (CJJ) Cheongju International Airport | South Korea | 229 mi | ~1h 3m | Jin Air, T'Way Air, and Jeju Air | 24-25/day |
| Gwangju (KWJ) Gwangju Airport | South Korea | 113 mi | ~49m | Asiana Airlines, Korean Air, and T'Way Air | 15-16/day |
| Daegu (TAE) Daegu Airport | South Korea | 206 mi | ~1h | T'Way Air, Jin Air, and Asiana Airlines | 14-15/day |
| Shanghai (PVG) Shanghai Pudong International Airport | China | 319 mi | ~1h 14m | Spring, Juneyao, and China Eastern | 11/day |
| Taipei (TPE) Taiwan Taoyuan International Airport | Taiwan | 663 mi | ~1h 57m | EASTAR JET, Jin Air, and T'Way Air | 4/day |
| Yeosu (RSU) Yeosu Airport | South Korea | 112 mi | ~49m | Asiana Airlines, Jin Air, and Korean Air | 4/day |
| Ulsan (USN) Ulsan Airport | South Korea | 217 mi | ~1h 2m | Air Busan and Korean Air | 3/day |
| Kunsan (KUV) Kunsan Air Base | South Korea | 165 mi | ~55m | Jin Air | 2-3/day |
| Hangzhou (HGH) Hangzhou Xiaoshan International Airport | China | 422 mi | ~1h 27m | Loong Air, Spring, and Beijing Capital | 2-3/day |
| Beijing (PEK) Beijing Capital International Airport | China | 711 mi | ~2h 3m | Korean Air, Air China, and Jeju Air | 2/day |
| Sokcho / Gangneung (YNY) Yangyang International Airport | South Korea | 337 mi | ~1h 17m | Parata Air | 2/day |
| Wonju (WJU) Wonju Airport | South Korea | 284 mi | ~1h 10m | Jin Air | 2/day |
| Nanjing (NKG) Nanjing Lukou Airport | China | 460 mi | ~1h 32m | Spring and Juneyao | 1-2/day |
| Singapore (SIN) Singapore Changi International Airport | Singapore | 2,657 mi | ~6h 4m | T'Way Air and Scoot | 1-2/day |
| Hong Kong (HKG) Chek Lap Kok International Airport | Hong Kong SAR China | 1,089 mi | ~2h 50m | Hong Kong Express and Jin Air | 1-2/day |
| Pohang (KPO) Pohang Airport | South Korea | 238 mi | ~1h 5m | Jin Air | 1-2/day |
| Beijing (PKX) Beijing Daxing International Airport | China | 696 mi | ~2h 1m | Spring and Jeju Air | 1-2/day |
| Kaohsiung City (KHH) Kaohsiung International Airport | Taiwan | 843 mi | ~2h 19m | T'Way Air and Tigerair Taiwan | 1-2/day |
| Shenzhen (SZX) Shenzhen Bao'an International Airport | China | 1,076 mi | ~2h 48m | Shenzhen | 1/day |
| Shenyang (SHE) Taoxian Airport | China | 585 mi | ~1h 47m | Spring | 1/day |
| Osaka (KIX) Kansai International Airport | Japan | 505 mi | ~1h 38m | T'Way Air | 1/day |
| Ningbo (NGB) Ningbo Lishe International Airport | China | 390 mi | ~1h 23m | Spring | 1/day |
| Sacheon (HIN) Sacheon Air Base | South Korea | 141 mi | ~52m | Korean Air | 1/day |
| Tokyo (NRT) Narita International Airport | Japan | 804 mi | ~2h 15m | Korean Air | 3×/wk |
| Wuxi (WUX) Sunan Shuofang International Airport | China | 380 mi | ~1h 22m | Juneyao | 3×/wk |
| Macao (MFM) Macau International Airport | Macao SAR China | 1,111 mi | ~2h 52m | T'Way Air | 2×/wk |
| Guangzhou (CAN) Guangzhou Baiyun International Airport | China | 1,062 mi | ~2h 46m | Spring | 2×/wk |
| Taichung City (RMQ) Taichung Ching Chuang Kang Airport | Taiwan | 731 mi | ~2h 5m | Tigerair Taiwan | 2×/wk |
| Zhengzhou (CGO) Xinzheng Airport | China | 727 mi | ~2h 5m | West Air (China) | 2×/wk |
| Wenzhou (WNZ) Wenzhou Yongqiang Airport | China | 512 mi | ~1h 38m | Air China | 2×/wk |
| Seoul (ICN) Incheon International Airport | South Korea | 273 mi | ~1h 9m | Jeju Air | 2×/wk |
| Tokyo (HND) Tokyo International Airport | Japan | 769 mi | ~2h 10m | Korean Air | weekly |