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Leases | 9 Months Ended
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Jun. 30, 2025
Leases [Abstract] |
Leases | 13. Leases As of June 30, 2025, we leased airport facilities, office space, and other property and equipment under non-cancelable operating leases. The leases generally require us to pay all taxes, maintenance, insurance, and other operating expenses. Operating leased expense is recognized as a rental expense on a straight-line basis over the lease term, net of lessor rebates and other incentives. Aggregate rental expense under all aircraft, equipment and facility leases totaled approximately $1.9 million and $4.5 million for the three months ended June 30, 2025 and June 30, 2024, respectively, and $8.0 million and $17.1 million for the nine months ended June 30, 2025 and June 30, 2024, respectively. The components of our lease costs were as follows (in thousands):
|  | Three Months Ended June 30, |  |  | Nine Months Ended June 30, |
|  | 2025 |  |  | 2024 |  |  | 2025 |  |  | 2024 |
Operating lease costs |  | $ | 639 |  |  | $ | 810 |  |  | $ | 2,000 |  |  | $ | 3,233 |
Variable and short-term lease costs |  |  | 1,261 |  |  |  | 2,581 |  |  |  | 5,907 |  |  |  | 5,543 |
Interest expense on finance lease liabilities |  |  | - |  |  |  | 746 |  |  |  | 48 |  |  |  | 3,291 |
Amortization expense of finance lease assets |  |  | - |  |  |  | 365 |  |  |  | 54 |  |  |  | 5,001 |
Total lease costs |  | $ | 1,900 |  |  | $ | 4,502 |  |  | $ | 8,009 |  |  | $ | 17,068 |
As of June 30, 2025, our operating leases have a remaining weighted average lease term of 5.8 years and our operating lease liabilities were measured using a weighted average discount rate of 5.4%.

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- Definition The entire disclosure for operating leases of lessee. Includes, but is not limited to, description of operating lease and maturity analysis of operating lease liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/842-20/tableOfContent + Details
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