Aircraft commitments are based on contractual scheduled aircraft deliveries. The amount and timing of these commitments could change to the extent that: (i) the Company and the aircraft manufacturers, with whom the Company has existing orders for new aircraft, agree to modify (or further modify) the contracts governing those orders, (ii) rights are exercised pursuant to the relevant agreements to cancel deliveries or modify the timing of deliveries, or (iii) the aircraft manufacturers are unable to deliver in accordance with the terms of those orders.

Guarantees. As of March 31, 2025, United is the guarantor of approximately $2.9 billion in aggregate principal amount of tax-exempt special facility revenue bonds and interest thereon. These bonds, which are issued by various airport authorities or other conduit issuers, are payable solely from rentals paid under long-term agreements with the respective airport authorities or from payments under loan agreements with the respective issuing authorities. The leasing arrangements associated with these obligations are accounted for as operating leases in the Company's financial statements. All of these bonds are due between 2027 and 2041.

Increased Cost Provisions. In United's financing transactions that include loans in which United is the borrower, United typically agrees to reimburse lenders for any reduced returns with respect to the loans due to any change in capital requirements and, in the case of loans with respect to which the interest rate is based on the Secured Overnight Financing Rate ("SOFR"), for certain other increased costs that the lenders incur in carrying these loans as a result of any change in law, subject, in most cases, to obligations of the lenders to take certain limited steps to mitigate the requirement for, or the amount of, such increased costs. At March 31, 2025, the Company had $8.4 billion of floating rate debt with remaining terms of up to approximately 12 years that are subject to these increased cost provisions. In several financing transactions involving loans or leases from non-U.S. entities, with remaining terms of up to approximately 12 years and an aggregate balance of $5.2 billion, the Company bears the risk of any change in tax laws that would subject loan or lease payments thereunder to non-U.S. entities to withholding taxes, subject to customary exclusions.