- 2023 World Airport Awards: World's Best Airport Staff Service, Best Airport Staff in Asia & World's Best Airport Immigration Service
- Agency : Skytrax
- Award date : Mar. 2023
- 2023 Korea's Most Admired Companies (16th Consecutive Year)
- Agency : Korea Management Association Consulting (KMAC)
- Award date : Mar. 2023
- 2023 MOIS Emergency Management Evaluation: Excellent Institution (4th Consecutive Year)
- Agency : Ministry of the Interior and Safety (MOIS)
- Award date : May. 2023
- ACI World-Amadeus Technology Innovation Awards: Winner of Technology Innovation (2nd Conseutive Year)
- Agency : Airports Council International (ACI), Amadeus
- Award date : Jun. 2023
- 2023 National Service Awards: Winner of Grand Prize for Airport Logistics Service (2nd Consecutive Year)
- Agency : The Institute for Industrial Policy Studies (IPS)
- Award date : Jun. 2023
- ACI Customer Experience Global Summit: Reissued Customer Experience Certification Level 5
- Agency : Airports Council International (ACI)
- Award date : Sep. 2023
- ACI Airport Carbon Accreditation Level 4
- Agency : Airports Council International (ACI)
- Award date : Sep. 2023
- MOTIE Minister's Award (5th K-Solar League)
- Agency : Korea Energy Agency (KEA)
- Award date : Sep. 2023
- 2023 K-ESG Management Awards: Public Institution ESG & Win-Win
- Agency : Dong-A Ilbo (Seoul-based daily newspaper)
- Award date : Sep. 2023
- 2023 Asia Freight, Logistics & Supply Chain (AFLAS) Awards: Best Green Airport (3rd Consecutive Year)
- Agency : Asia Cargo News
- Award date : Oct. 2023
- AMSOK Awards: Aviation Development
- Agency : Aviation Management Society of Korea (AMSOK)
- Award date : Nov. 2023
- 2023 Future Travel Experience (FTE) Asia Expo: Top 5 Airport in Asia-Pacific
- Agency : Future Travel Experience (FTE)
- Award date : Nov. 2023
- 2023 ARKO Awards: ARTISTREE & Artners Club (Only Public Institution)
- Agency : Ministry of Culture, Sports and Tourism (MCST), Arts Council Korea (ARKO)
- Award date : Nov. 2023
- 2023 GT Tested Reader Survey Awards: Best Airport in Asia & Best Duty-Free Shopping in Asia
- Agency : Global Traveler (GT)
- Award date : Nov. 2023
- 2023 National Value Engineering Awards: Winner of Grand Prize in Public Sector (3rd Consecutive Year)
- Agency : Ministry of Land, Infrastructure and Transport (MOLIT)
- Award date : Nov. 2023
- 2023 Government Innovation Success Case Awards: MOIS Minister's Award
- Agency : Ministry of the Interior and Safety (MOIS)
- Award date : Nov. 2023
- 2023 Korean Readers' Choice Awards: First Place in Public Sector (Ministry of Land, Infrastructure and Transport) (14th Consecutive Year)
- Agency : Korean Standards Association (KSA)
- Award date : Nov. 2023
- Global Standard Management Awards: Winner of Grand Prize for Corporate Sustainability Management (5th Consecutive Year)
- Agency : Korea Management Registrar (KMR)
- Award date : Nov. 2023
- Highest Level (Lv. 5) in the Corporate Social Responsibility in the Community and Special Award of Life Insurance Philanthropy Foundation (First)
- Agency : Ministry of Health and Welfare (MOHW), Korea Social Service Network (SSN)
- Award date : Dec. 2023
- 2023 ACIIA Audit Committee Forum Awards: Proud Auditor for Internal Audit, Internal Audit Quality Innovation, Excellence in Social Value Realization
- Agency : The Institute of Internal Auditors Korea (IIA)
- Award date : Dec. 2023
- Highest "Platinum" Level in ICAO Aviation Training Certification
- Agency : International Civil Aviation Organization (ICAO)
- Award date : Dec. 2023
- 2023 Korea Public Institution Auditors Awards: Best Auditor
- Agency : Association of Public Institution Auditors of Korea
- Award date : Dec. 2023
- 2023 National Core Infrastructure Disaster Management Assessment: Excellent Organization, MOIS Minister's Award
- Agency : Ministry of the Interior and Safety (MOIS)
- Award date : Dec. 2023