Cash Flows provided by Operating Activities
Our cash flows provided by operating activities was $150.2 million for the three months ended March 31, 2023, compared to $20.5 million for the three months ended March 31, 2022. Our operating cash flows are typically impacted by various factors including our net income, adjusted for non-cash expenses and gains such as depreciation expense, stock-based compensation expense and gains or losses on the disposal of assets; and timing of cash payments and cash receipts attributed to our various current asset and liability accounts, such as accounts receivable, inventory, accounts payable, accrued liabilities, deferred revenue and unbilled revenue.
The increase in our cash flow from operations for the three months ended March 31, 2023, compared to the three months ended March 31, 2022, was primarily due to the timing of cash payments on our current liability accounts and cash received in excess of revenue recognized for the three months ended March 31, 2023, compared to the three months ended March 31, 2022.
Cash Flows provided by (used in) Investing Activities
Our cash flows provided by investing activities was $3.0 million for the three months ended March 31, 2023, compared to cash flows used in investing activities of $124.7 million for the three months ended March 31, 2022. Our investing cash flows are typically impacted by various factors including our capital expenditures, such as the acquisition of aircraft and spare engines; deposit payments and refunds of previously made deposits on new aircraft; purchase and sales of marketable securities; proceeds from the sale of assets; and timing of cash payments and cash receipts attributed to our various long-term asset and long-term liability accounts.
For the three months ended March 31, 2023, cash provided by the sale of marketable securities, net of purchases of marketable securities, was $84.4 million, an increase of $92.8 million from cash used for the purchase of marketable securities, net of sales of marketable securities of $8.5 million, for the three months ended March 31, 2022. Cash used for aircraft deposits decreased $28.0 million for the three months ended March 31, 2023, compared to the three months ended March 31, 2022, based on the timing of new aircraft orders. Additionally, cash provided by other long-term assets increased $20.2 million for the three months ended March 31, 2023, compared to the three months ended March 31, 2022, due to reductions in our long-term receivables.
Cash Flows provided by (used in) Financing Activities
Our cash flows used in financing activities was $181.7 million for the three months ended March 31, 2023, compared to cash provided by financing activities of $91.7 million for the three months ended March 31, 2022. Our financing cash flows are typically impacted by various factors including proceeds from issuance of debt, principal payments on debt obligations, repurchases of our common stock and payment of cash dividends.
The $273.4 million increase in cash used for financing activities for the three months ended March 31, 2023, compared to the three months ended March 31, 2022, was primarily due to a decrease of $160.7 million in proceeds from the issuance of long-term debt and $100.0 million of cash used to purchase treasury stock during the three months ended March 31, 2023.
Significant Commitments and Obligations
General
See Note 6, "Leases, Commitments and Contingencies," to the condensed consolidated financial statements for our commitments and obligations for each of the next five years and thereafter.
Purchase Commitments and Options
As of March 31, 2023, we had a firm purchase commitment for four new E175 aircraft from Embraer with delivery dates anticipated into 2025.