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03

Proving itself as the

world’s best airport

Incheon Airport became the world’s first airport to be awarded with the Grade 5 (highest grade) customer experience
accreditation for the third time at the Sixth Customer Experience Global Summit in September 2024. The Customer
Experience Accreditation Program is a comprehensive airport evaluation system introduced by the Airports Council

International (ACI). It goes beyond the traditional Airport Service Quality (ASQ) assessments to evaluate the entire customer
journey—from pre-departure to boarding—along with innovations in service from various perspectives. It was introduced
in April 2019, and Incheon Airport received Grade 3 in 2020, Grade 4 in 2021, and became the first airport in the world to
receive Grade 5 in 2022. It received Grade 5 again in 2023 and 2024, proving its world class infrastructure and service once

again.

246 The 30-year History of Incheon Airport Construction 247