116 destinations have scheduled flights from ICN, about 2,251 departures a week. Weekly frequencies come from airline schedules and observed departures, not live status.
| Destination | Flights per week | Airlines | Typical duration |
|---|---|---|---|
| Kansai International Airport (KIX) | 144 | Jeju Air Co. Ltd., Korean Air, Asiana, Jin Air Co. Ltd, Air Busan | — |
| Narita International Airport (NRT) | 143 | Korean Air, Jeju Air Co. Ltd., Asiana, Jin Air Co. Ltd, EASTAR JET Co. Ltd. | — |
| Hong Kong International Airport (HKG) | 95 | Cathay Pacific, Hong Kong Express Airways, Korean Air, Jeju Air Co. Ltd., Air Busan | — |
| Fukuoka Airport (FUK) | 91 | Jin Air Co. Ltd, Jeju Air Co. Ltd., Korean Air, T'way Air, EASTAR JET Co. Ltd. | — |
| Qingdao Jiaodong International Airport (TAO) | 80 | Shandong Airlines, China Eastern, Korean Air, Qingdao Airlines Co., Ltd | — |
| Shanghai Pudong International Airport (PVG) | 77 | China Eastern, China Southern Airlines, Asiana, Shanghai Airlines, Korean Air | — |
| Da Nang International Airport (DAD) | 60 | Korean Air, Asiana, Oman Gvmt, T'way Air, Thai Smile | — |
| Suvarnabhumi Airport (BKK) | 59 | Korean Air, Jeju Air Co. Ltd., Asiana, Thai Airways International, T'way Air | — |
| Taiwan Taoyuan International Airport (TPE) | 59 | EVA Air, China Airlines, Korean Air, Jin Air Co. Ltd, Asiana | — |
| Cam Ranh International Airport / Cam Ranh Air Base (CXR) | 49 | Jeju Air Co. Ltd., Air Busan, Korean Air, T'way Air, EASTAR JET Co. Ltd. | — |
| Singapore Changi Airport (SIN) | 48 | Korean Air, Jeju Air Co. Ltd., Asiana, Singapore Airlines, T'way Air | — |
| Chubu Centrair International Airport (NGO) | 41 | Jeju Air Co. Ltd., Jin Air Co. Ltd, Korean Air, Asiana | — |
| Phú Quốc International Airport (PQC) | 40 | Jeju Air Co. Ltd., Galaxy Airways, Korean Air, Jin Air Co. Ltd, T'way Air | — |
| Beijing Capital International Airport (PEK) | 37 | Air China Limited, Asiana, Korean Air | — |
| Ninoy Aquino International Airport (MNL) | 35 | Korean Air, Jeju Air Co. Ltd., Asiana, Philippine Airlines | — |
| Los Angeles International Airport (LAX) | 33 | Korean Air, Air Premia, Asiana | — |
| Tan Son Nhat International Airport (SGN) | 31 | Korean Air, Asiana, Vietnam Airlines, Vietjet Aviation Joint Stock Company | — |
| Yanji Chaoyangchuan Airport (YNJ) | 31 | Air China Limited, China Southern Airlines, China Eastern, Asiana, Jeju Air Co. Ltd. | — |
| Dalian Zhoushuizi International Airport (DLC) | 28 | China Southern Airlines, Korean Air, Asiana | — |
| Noi Bai International Airport (HAN) | 28 | Jeju Air Co. Ltd., Korean Air, Asiana, Vietnam Airlines | — |
| Seattle–Tacoma International Airport (SEA) | 25 | Delta Air Lines, Korean Air, Alaska Airlines, Asiana | — |
| San Francisco International Airport (SFO) | 25 | Korean Air, Asiana, Albatross Airlines, Air Premia | — |
| Vancouver International Airport (YVR) | 25 | Korean Air, Air Canada, T'way Air | — |
| Hangzhou Xiaoshan International Airport (HGH) | 23 | Air China Limited, Asiana, China Eastern, Korean Air | — |
| Sydney Kingsford Smith International Airport (SYD) | 23 | Korean Air, Asiana, Jetstar Airways, T'way Air | — |
| Guangzhou Baiyun International Airport (CAN) | 21 | China Southern Airlines, Asiana | — |
| Denpasar I Gusti Ngurah Rai International Airport (DPS) | 21 | Korean Air, Jeju Air Co. Ltd. | — |
| Tokyo Haneda International Airport (HND) | 21 | Korean Air, Peach, Asiana | — |
| Kaohsiung International Airport (KHH) | 21 | EVA Air, China Airlines, T'way Air | — |
| Nanjing Lukou International Airport (NKG) | 21 | China Eastern, Asiana | — |
| Gimhae International Airport (PUS) | 21 | Korean Air | — |
| Taichung International Airport / Ching Chuang Kang Air Base (RMQ) | 21 | Korean Air, Jin Air Co. Ltd, T'way Air | — |
| Shenyang Taoxian International Airport (SHE) | 21 | China Southern Airlines, Korean Air | — |
| Weihai Dashuibo Airport (WEH) | 21 | Jeju Air Co. Ltd., China Eastern, Air Guinee, UPS Airlines | — |
| Harbin Taiping International Airport (HRB) | 20 | China Southern Airlines, Asiana | — |
| Shenzhen Bao'an International Airport (SZX) | 20 | Shenzhen Airlines, China Southern Airlines | — |
| Yantai Penglai International Airport (YNT) | 19 | China Eastern, EASTAR JET Co. Ltd. | — |
| Mactan Cebu International Airport (CEB) | 18 | Cebu Pacific Air, Korean Air, Jeju Air Co. Ltd. | — |
| Clark International Airport / Clark Air Base (CRK) | 18 | Jeju Air Co. Ltd., Jin Air Co. Ltd, Asiana | — |
| Antonio B. Won Pat International Airport (GUM) | 18 | Jin Air Co. Ltd, Korean Air, Oman Gvmt | — |
| Chengdu Tianfu International Airport (TFU) | 17 | Air China Limited, Asiana, Sichuan Airlines | — |
| Daniel K. Inouye International Airport (HNL) | 16 | Korean Air, Asiana, Air Premia | — |
| Tianjin Binhai International Airport (TSN) | 16 | Air China Limited, Tianjin Airlines | — |
| Hartsfield Jackson Atlanta International Airport (ATL) | 14 | Delta Air Lines | — |
| Chongqing Jiangbei International Airport (CKG) | 14 | Air China Limited, Asiana | — |
| New Chitose Airport (CTS) | 14 | Jeju Air Co. Ltd., Korean Air | — |
| Rome–Fiumicino Leonardo da Vinci International Airport (FCO) | 14 | T'way Air, Asiana, Korean Air | — |
| Phuket International Airport (HKT) | 14 | Korean Air, Asiana | — |
| John F. Kennedy International Airport (JFK) | 14 | Korean Air, Asiana | — |
| Techo International Airport (KTI) | 14 | Korean Air, Asiana | — |
| Naha International Airport (OKA) | 14 | Jeju Air Co. Ltd., Asiana | — |
| Beijing Daxing International Airport (PKX) | 14 | Air China Limited, China Eastern | — |
| Bohol-Panglao International Airport (TAG) | 14 | Jeju Air Co. Ltd., Jin Air Co. Ltd | — |
| Zhangjiajie Hehua International Airport (DYG) | 13 | Sichuan Airlines, Korean Air, Oman Gvmt | — |
| Ulaanbaatar Chinggis Khaan International Airport (UBN) | 13 | MIAT, Aero Mongolia, Asiana | — |
| Soekarno-Hatta International Airport (CGK) | 12 | Asiana, T'way Air | — |
| Chiang Mai International Airport (CNX) | 12 | Jeju Air Co. Ltd., Air Busan, EASTAR JET Co. Ltd. | — |
| İstanbul Airport (IST) | 12 | THY - Turkish Airlines, Korean Air | — |
| Jinan Yaoqiang International Airport (TNA) | 12 | Shandong Airlines | — |
| Amsterdam Airport Schiphol (AMS) | 11 | KLM, Korean Air | — |
| Changchun Longjia International Airport (CGQ) | 11 | China Southern Airlines | — |
| Kota Kinabalu International Airport (BKI) | 10 | Jin Air Co. Ltd, Jeju Air Co. Ltd. | — |
| Changsha Huanghua International Airport (CSX) | 10 | Korean Air, Asiana | — |
| Indira Gandhi International Airport (DEL) | 10 | Air India, Korean Air | — |
| Don Mueang International Airport (DMK) | 10 | Thai AirAsia, Solenta Aviation | — |
| Sunan Shuofang International Airport (WUX) | 10 | China Eastern, Shenzhen Airlines | — |
| Zhengzhou Xinzheng International Airport (CGO) | 8 | China Southern Airlines, EASTAR JET Co. Ltd. | — |
| Zayed International Airport (AUH) | 7 | Etihad Airways | — |
| Brisbane International Airport (BNE) | 7 | Korean Air, Jetstar Airways | — |
| Budapest Liszt Ferenc International Airport (BUD) | 7 | Korean Air, Asiana | — |
| Fuzhou Changle International Airport (FOC) | 7 | Xiamen Airlines | — |
| Frankfurt Main Airport (FRA) | 7 | Lufthansa Cargo | — |
| Mount Fuji Shizuoka Airport (FSZ) | 7 | Jeju Air Co. Ltd. | — |
| Helsinki Vantaa Airport (HEL) | 7 | Finnair | — |
| Hiroshima Airport (HIJ) | 7 | Jeju Air Co. Ltd. | — |
| Kitakyushu Airport (KKJ) | 7 | Jin Air Co. Ltd | — |
| Kumamoto Airport (KMJ) | 7 | Korean Air | — |
| Kagoshima Airport (KOJ) | 7 | Korean Air | — |
| Kuala Lumpur International Airport (KUL) | 7 | Korean Air | — |
| Harry Reid International Airport (LAS) | 7 | Korean Air | — |
| London Heathrow Airport (LHR) | 7 | Intercontinental Airlines | — |
| Sam Ratulangi International Airport (MDC) | 7 | EASTAR JET Co. Ltd. | — |
| Minneapolis–Saint Paul International Airport / Wold–Chamberlain Field (MSP) | 7 | Delta Air Lines | — |
| Milan Malpensa International Airport (MXP) | 7 | Korean Air, Asiana | — |
| Matsuyama Airport (MYJ) | 7 | Jeju Air Co. Ltd. | — |
| Salt Lake City International Airport (SLC) | 7 | Delta Air Lines | — |
| Daegu International Airport (TAE) | 7 | Korean Air | — |
| Takamatsu Airport (TAK) | 7 | Jin Air Co. Ltd | — |
| Tashkent International Airport (TAS) | 7 | Asiana, Taban Airlines | — |
| Kobe Airport (UKB) | 7 | Korean Air | — |
| Xiamen Gaoqi International Airport (XMN) | 7 | Xiamen Airlines | — |
| Toronto Pearson International Airport (YYZ) | 7 | Air Canada | — |
| Dallas Fort Worth International Airport (DFW) | 6 | American Airlines | — |
| Newark Liberty International Airport (EWR) | 6 | Air Premia | — |
| Mexico City Benito Juárez International Airport (MEX) | 6 | Aeromexico | — |
| Almaty International Airport (ALA) | 5 | Asiana | — |
| Josep Tarradellas Barcelona-El Prat Airport (BCN) | 5 | Asiana | — |
| Charles de Gaulle International Airport (CDG) | 5 | Air France | — |
| Hefei Xinqiao International Airport (HFE) | 5 | Korean Air | — |
| Macau International Airport (MFM) | 5 | Air Macau | — |
| Yonago Kitaro Airport / JASDF Miho Air Base (YGJ) | 5 | Oman Gvmt | — |
| Auckland International Airport (AKL) | 4 | Korean Air | — |
| Copenhagen Kastrup Airport (CPH) | 4 | SAS | — |
| Haikou Meilan International Airport (HAK) | 4 | Hainan Airlines | — |
| Hakodate Airport (HKD) | 4 | Jeju Air Co. Ltd. | — |
| Kunming Changshui International Airport (KMG) | 4 | Korean Air | — |
| Guilin Liangjiang International Airport (KWL) | 4 | Jeju Air Co. Ltd. | — |
| Munich Airport (MUC) | 4 | Lufthansa Cargo | — |
| Yangon International Airport (RGN) | 4 | Myanmar Airways International | — |
| Calgary International Airport (YYC) | 4 | African International Airways | — |
| Hamad International Airport (DOH) | 3 | Qatar Airways | — |
| Lisbon Humberto Delgado Airport (LIS) | 3 | Korean Air | — |
| Tokushima Awaodori Airport / JMSDF Tokushima Air Base (TKS) | 3 | EASTAR JET Co. Ltd. | — |
| Wenzhou Longwan International Airport (WNZ) | 3 | Air China Limited | — |
| Wuhan Tianhe International Airport (WUH) | 3 | China Southern Airlines | — |
| Shijiazhuang Zhengding International Airport (SJW) | 2 | Spring Airlines Limited Corporation | — |
GET /routes returns each scheduled flight from ICN: airline, flight number, departure and arrival time, duration, days of operation and aircraft type.
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