2025–2026 Update: Moody's U.S. airport sector outlook remained stable per Airport Monitor 2024. Post-pandemic traffic recovery reached 98% of 2019 levels by 2024 (FAA). .. ACI-NA "Airport Capital Spending Report" (2022: $128B over 5 years; no exact 2023 $150B study found). (ACI-NA model assumptions). The FAA Reauthorization Act of 2024 (P.L. 118-63) authorizes $4.0 billion for the Airport Improvement Program (AIP) annually for fiscal years 2024 through 2028., on the capital funding side but the core debt-driven financing model remains for hub airports.
Last Updated: 2026-03-07 — QC corrections (S288): removed unanchored qualifiers, anchored claims to specific metrics This article is based on publicly available sources including official statements, audited financial reports, EMMA filings, rating agency reports, and government records. The research is not exhaustive — readers can conduct their own independent research and consult qualified professionals before relying on any information presented here.
I. Introduction
Airport bond ratings are indicators of credit quality that directly influence an airport's borrowing costs and capital financing strategies. The three rating agencies—Moody's Investors Service, Standard & Poor's, and Fitch Ratings—employ distinct but complementary methodologies to assess airport credit risk. Each agency evaluates revenue stability, demand sustainability, operational efficiency, use metrics, and management quality to determine credit ratings that range from AAA (highest quality) to C (speculative).
Understanding the factors that drive ratings and the criteria applied by each agency may inform airport executives, financial advisors, investors, and financing professionals.
This reference guide details the specific methodologies of Moody's (Factor 1: Market Position, Factor 2: Financial Metrics, Factor 3: Covenants and Other Legal Provisions), S&P (Enterprise Risk + Financial Risk Framework), and Fitch (Volume Risk, Price Risk, Infrastructure, Debt Structure, and Financial Profile). It examines common credit factors across all three agencies, rating thresholds, and the impact of rating decisions on airport financing strategies.
II. Overview of Airport Revenue Bonds
Airport revenue bonds are non-recourse debt obligations secured by pledged airport revenues. Unlike general obligation bonds backed by the full faith and credit of a municipality, airport revenue bonds depend entirely on the airport's ability to generate sufficient revenues to service debt.
Types of Airport Revenue Bonds
correct: median A1/A2 (not Aa2/Aa3); Moody's 2024 Airport Monitor (Q4): 28 large-hubs median A1 senior lien.
Subordinate Lien (Second Lien) Bonds — Second claim on pledged revenues, averaged 1-2 notches lower per Moody's 2024 data
General Airport Revenue Bonds — Secured by all airport operating revenues
Special Facility Bonds — Secured by revenues from specific facilities (e.g., cargo terminal, parking facility)
Subordinated Debt — Additional bonds test and flow of funds constraints affect issuance capacity
Revenue Pledging and Debt Service
no public summary found; plausible but not directly verifiable. - "The for exact 24/28 count. provides: [tiers as listed]" — [Airport Official Statements, EMMA](https://emma.msrb.org/), standard waterfall structure is industry norm. #### Moody's Rating Methodology and Metrics - "Moody's Investors Service evaluates airport credit quality through a three- The for exact 24/28 count. provides:
Tier 1: Operation and Maintenance (O&M) expenses
Tier 2: Debt Service on Senior Lien Bonds
Tier 3: Debt Service on Subordinate Lien Bonds
Tier 4: Capital Reserve Funds and Debt Service Reserve Funds (DSRFs)
Tier 5: Rate Stabilization/Renewal and Replacement Funds
Tier 6: Residual revenues available for dividends or additional capital investment