| Assets | — | — |
| Current assets | — | — |
| Cash and cash equivalents | 3.07a | 2.74a |
| Short-term investments | 0a | 1.13a |
| Accounts receivable, net of an allowance for uncollectible accounts of $18 and $17 | 3.22a | 3.13a |
| Fuel, expendable parts and supplies inventories, net of an allowance for obsolescence of $120 and $123 | 1.43a | 1.31a |
| Prepaid expenses and other | 2.12a | 1.96a |
| Total current assets | 9.84a | 10.27a |
| Noncurrent assets | — | — |
| Property and equipment, net of accumulated depreciation and amortization of $23,228 and $21,707 | 37.6a | 35.49a |
| Operating lease right-of-use assets | 6.64a | 7a |
| Goodwill | 9.75a | 9.75a |
| Identifiable intangibles, net of accumulated amortization of $919 and $911 | 5.98a | 5.98a |
| Equity investments | 2.85a | 3.46a |
| Other noncurrent assets | 2.72a | 1.69a |
| Total noncurrent assets | 65.53a | 63.38a |
| Total assets | 75.37a | 73.64a |
| Liabilities and stockholders' equity | — | — |
| Current liabilities | — | — |
| Current maturities of debt and finance leases | 2.18a | 2.98a |
| Current maturities of operating leases | 0.76a | 0.76a |
| Air traffic liability | 7.09a | 7.04a |
| Accounts payable | 4.65a | 4.45a |
| Accrued salaries and related benefits | 4.76a | 4.56a |
| Loyalty program deferred revenue | 4.31a | 3.91a |
| Fuel card obligation | 1.1a | 1.1a |
| Other accrued liabilities | 1.81a | 1.62a |
| Total current liabilities | 26.67a | 26.42a |
| Noncurrent liabilities | — | — |
| Debt and finance leases | 14.02a | 17.07a |
| Pension, postretirement and related benefits | 3.14a | 3.6a |
| Loyalty program deferred revenue | 4.51a | 4.51a |
| Noncurrent operating leases | 5.81a | 6.47a |
| Deferred income taxes, net | 2.18a | 0.91a |
| Other noncurrent liabilities | 3.74a | 3.56a |
| Total noncurrent liabilities | 33.41a | 36.12a |
| Stockholders' equity | — | — |
| Common stock at $0.0001 par value; 1,500,000,000 shares authorized, 654,571,606 and 654,671,194 shares issued | 0a | 0a |
| Additional paid-in capital | 11.74a | 11.64a |
| Retained earnings | 8.78a | 5.65a |
| Accumulated other comprehensive loss | -4.98a | -5.85a |
| Treasury stock, at cost, 8,098,971 and 11,224,246 shares | -0.25a | -0.34a |
| Total stockholders' equity | 15.29a | 11.11a |
| Total liabilities and stockholders' equity | 75.37a | 73.64a |