WESTJET Strategy Overview

Non-GAAP and additional GAAP measures This presentation contains disclosure respecting non-GAAP financial measures including, without limitation, return on invested capital (ROIC); cash to twelve month revenue; and adjusted net debt to earnings before interest, taxes, depreciation, aircraft rent and other items (EBITDAR). These measures are included to enhance the overall understanding of WestJet's financial performance and to provide an alternative method for assessing WestJet's operating results in a manner that is focused on the performance of WestJet's ongoing operations, and to provide a more consistent basis for comparison between reporting periods. These measures are not calculated in accordance with, or an alternative to, GAAP and do not have standardized meanings. Therefore, they may not be comparable to similar measures provided by other entities. Readers are urged to review the section entitled "Reconciliation of non-GAAP and additional GAAP measures" in WestJet's management's discussion and analysis of financial results for the three and nine months ended September 30, 2017, which is available under WestJet's profile at www.sedar.com, for a further discussion of such non-GAAP measures. KEY OPERATING INDICATORS Key operating indicators used herein have the meanings ascribed thereto in WestJet's management's discussion and analysis of financial results for the three and nine months ended September 30, 2017 under the heading "Definition of key operating indicators". PRESENTATION OF FINANCIAL INFORMATION All financial data contained in this presentation in respect of WestJet for periods subsequent to December 31, 2009 has been prepared in accordance with International Financial Reporting Standards ("IFRS"). For periods prior to January 1, 2010, WestJet prepared its financial statements in accordance with Canadian generally accepted accounting principles as defined in Part V of the Canadian Institute of Chartered Accountant's Handbook ("Previous GAAP"). For additional information concerning the impact upon WestJet's financial statements for periods prior to January 1, 2011 of significant differences between IFRS as utilized in preparing its financial statements and Previous GAAP, please see note 22 to WestJet's financial statements for the years ended December 31, 2011 and 2010. Financial information with respect to WestJet's competitors included in this presentation has been derived from the financial information made publicly available by those companies, which, in most cases, was prepared using financial reporting standards different from those used by WestJet, which may not be comparable to those used by WestJet. Note: All references to dollars contained in the presentation refer to Canadian Dollars (CAD), unless otherwise noted 4 TSE: WJA

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