Incheon International Airport Corporation (KORAIR)

IIAC’s current credit quality should be treated, on a support-inclusive basis, as that of a Korean quasi-sovereign very close to the Korean sovereign at the AA level, while its stand-alone credit quality is one notch lower, constrained by the airport franchise, commercial revenue, debt, and capital expenditure. The direction of credit quality is one of gradual stand-alone improvement, supported by the completion of Phase 4, passenger and cargo recovery, and capital expenditure normalisation. Under normal conditions, the likelihood of a rapid deterioration in level or direction is not high, but spreads and the stand-alone assessment could worsen relatively quickly if a Korean sovereign downgrade, a change in the government support assessment, an international passenger shock, commercial rent deterioration, and accelerated major investment occur together.

The first pillar supporting credit quality is IIAC’s policy importance as core infrastructure for Korean international aviation. IIAC exclusively operates and develops Korea’s main international gateway airport and is deeply embedded in international passengers, cargo, trade, tourism, and business travel. The statement that it handled 76.7% of international aircraft, 70.1% of international visitors, and 30.6% of external merchandise trade value in 2025 supports the government’s strong incentive to maintain the company’s credit quality. S&P’s view that the likelihood of government support is almost certain is based on this policy importance.

The second pillar is the recovery in stand-alone fundamentals. With the completion of Phase 4, annual passenger capacity has expanded to 106 million, and passenger and cargo volumes remained high from 2025 into 2026. Net debt / total capital improved from 2024 to 40.91% at year-end 2025, and S&P expects FFO/debt of approximately 24% in 2026. If capital expenditure normalises from the 2024 peak, IIAC will gain room to apply operating cash flow to debt reduction.