Exhibit 21.1
Sky Harbour Group Corporation
Subsidiaries of the Registrant as of December 31, 2025
| Subsidiary | Parent Entity | Jurisdiction of Organization |
| Sky Harbour LLC | Sky Harbour Group Corporation | Delaware |
| Sky Harbour Services, LLC | Sky Harbour LLC | Delaware |
| Sky Harbour Holdings LLC | Sky Harbour LLC | Delaware |
| Sky Harbour Capital LLC | Sky Harbour Holdings LLC | Delaware |
| Addison Hangars LLC | Sky Harbour Capital LLC | Delaware |
| APA Hangers LLC | Sky Harbour Capital LLC | Delaware |
| DVT Hangars LLC | Sky Harbour Capital LLC | Delaware |
| Nashville Hangars LLC | Sky Harbour Capital LLC | Delaware |
| OPF Hangars Landlord LLC | Sky Harbour Capital LLC | Delaware |
| Sky Harbour Opa Locka Airport, LLC | Sky Harbour Capital LLC | Delaware |
| Sky Harbour Sugar Land Airport, LLC | Sky Harbour Capital LLC | Delaware |
| Sky Harbour Holdings II LLC | Sky Harbour LLC | Delaware |
| Sky Harbour Capital II LLC | Sky Harbour Holdings II LLC | Delaware |
| Sky Harbour Holdings III LLC | Sky Harbour LLC | Delaware |
| Sky Harbour Capital III LLC | Sky Harbour LLC | Delaware |
| Sky Harbour Holdings IV LLC | Sky Harbour LLC | Delaware |
| Ascend Aviation Holdings LLC | Sky Harbour LLC | Delaware |
| Ascend Aviation Services LLC | Ascend Aviation Holdings LLC | Delaware |
| Sky Harbour National Holdings LLC | Sky Harbour LLC | Delaware |
| APA Hangars II LLC | Sky Harbour National Holdings LLC | Delaware |
| BDL Hangars LLC | Sky Harbour National Holdings LLC | Delaware |
| BFI Development LLC | Sky Harbour National Holdings LLC | Delaware |
| CMA CloudNine Holdings LLC | Sky Harbour National Holdings LLC | Delaware |
| CloudNine at Camarillo LP | CMA CloudNine Holdings LLC | California |
| CMA Sky 805 Holdings LLC | Sky Harbour National Holdings LLC | Delaware |
| Sky 805 LLC | CMA Sky 805 Holdings LLC | California |
| DAL Development LLC | Sky Harbour National Holdings LLC | Delaware |
| HIO Development LLC | Sky Harbour National Holdings LLC | Delaware |
| IAD Hangars LLC | Sky Harbour National Holdings LLC | Delaware |
| LGB Development LLC | Sky Harbour National Holdings LLC | Delaware |
| POU Development LLC | Sky Harbour National Holdings LLC | Delaware |
| PWK Hangars LLC | Sky Harbour National Holdings LLC | Delaware |
| RBD Development LLC | Sky Harbour National Holdings LLC | Delaware |
| SHOLA, LLC | Sky Harbour National Holdings LLC | Delaware |
| SHSLA, LLC | Sky Harbour National Holdings LLC | Delaware |
| SJC Hangars LLC | Sky Harbour National Holdings LLC | Delaware |
| Sky Harbour Florida Holdings, LLC | Sky Harbour National Holdings LLC | Delaware |
| SLC Development LLC | Sky Harbour National Holdings LLC | Delaware |
| SWF Development LLC | Sky Harbour National Holdings LLC | Delaware |
| TTN Development LLC | Sky Harbour National Holdings LLC | Delaware |
| Weatherford Steel Buildings GP LLC | Sky Harbour National Holdings LLC | Delaware |
| Weatherford Steel Buildings Holdings LLC | Sky Harbour National Holdings LLC | Delaware |
| Overflow Ltd | Weatherford Steel Buildings Holdings LLC | Texas |
| Stratus Building Systems Inc. | Overflow Ltd | Texas |