Employees needing reimbursement for business-related expenses can submit an expense report to their company’s payable department.  Expense reports are approved for payment by the employee’s authorized supervisor or manager.  In some cases, non-employees will also submit an expense to a company for reimbursement.  For example, attorneys will submit an invoice to a client that includes reimbursable expenses incurred in connection with their services. The attorney submits an expense report to their own law firm and charges client-connected expenses to billing codes for later reimbursement.  Airlines and travel insurance companies may be responsible for repaying the expenses of customers incurred from flight cancellations. Southwest Airlines canceled 15,750 flights from December 22 through December 28, 2022, due to winter weather and widespread failures in systems, staffing, and plane locations during holiday season travel.