In 2016, the Financial Accounting Standards Board (FASB) has issued a new standard for lease accounting. The standard requires capitalization by lessees of most leases currently treated as rentals, i.e., those currently classified as operating leases under the existing standard for lease accounting. We examine the impact on airlines that currently make use of operating leases. Several key financial ratios are examined before capitalization and then after capitalization on a pro forma basis. The results indicate that working capital, leverage, and solvency change dramatically in a negative direction, and airline rankings based on those ratios also change, which has implications for benchmarking performance.