December 31,

September 30,

2024

2023

Expendable parts and supplies, net:

Expendable parts and supplies

$

39,404

$

39,089

$

39,630

Less: expendable parts warranty

(5,574

)

(6,079

)

(6,295

)

Less: obsolescence

(4,658

)

(4,738

)

(4,090

)

$

29,172

$

28,272

$

29,245

Property and equipment, net:

Aircraft and other flight equipment

$

319,831

$

591,421

$

1,039,782

Other equipment

9,788

9,503

9,421

Total property and equipment

329,619

600,924

1,049,203

Less: accumulated depreciation

(126,052

)

(174,573

)

(351,181

)

$

203,567

$

426,351

$

698,022

Other assets:

Investments in equity securities

$

300

$

300

$

20,320

Lease incentives

—

812

954

Contract asset

5,400

6,081

8,756

Other

1,129

516

516

$

6,829

$

7,709

$

30,546

Other accrued expenses:

Accrued property taxes

$

4,722

$

4,650

$

5,281

Accrued interest

3,207

2,997

3,447

Accrued vacation

7,308

7,421

6,763

Accrued lodging

3,847

4,433

3,984

Accrued maintenance

1,911

2,493

2,117

Accrued employee benefits

1,528

1,075

1,450

Accrued fleet operating expense

3,118

2,751

650

Other

8,841

6,488

3,309

$

34,482

$

32,308

$

27,001

Other noncurrent liabilities:

Warrant liabilities

$

25,225

$

25,225

$

25,225

Lease incentive obligations

—

1,050

1,050

Long-term employee benefits

537

485

429

Other

913

1,819

1,818

$

26,675

$

28,579

$

28,522