Spirit Airlines : Investor Update

Investor Update 2.9.16

Exhibit 99.1

Investor Update

February 9, 2016

This investor update provides Spirit's first quarter and full year 2016 guidance. All data is based on preliminary estimates.

Capacity - Available Seat Miles (ASMs)

1Q16E

Year-over-Year % Change 27.5%

Operating Margin(1) 19.0 % - 20.5%

Operating Expense per ASM (CASM) (cents)

Adjusted CASM ex-fuel year-over-year % change(2) (2.5)% - (3.5)%

Average Stage Length (miles) 1,005

Fuel Expense ($)

Fuel gallons (millions) 70.1

Economic fuel cost per gallon(3) $1.25

Selected Operating Expenses ($Millions)

Aircraft rent $53.6

Depreciation and amortization $23.0

Interest Expense, net of Capitalized Interest ($Millions)

Interest expense $8.6

Capitalized interest (3.2)

Interest expense, net of capitalized interest $5.4

Effective Tax Rate 37%

Wtd. Average Share Count (Millions)

Diluted 71.7

Full Year 2016 Guidance

Capacity - Available Seat Miles (ASMs)

Full Year 2016E

Year-over-Year % Change 20%

Operating Expense per ASM (CASM) (cents)

Adjusted CASM ex-fuel year-over-year % change(3) Flat to down 1%

Average Stage Length (miles)990

Fuel gallons (millions)296.3

Selected Operating Expenses ($Millions)

Aircraft rent $235 - $245

Depreciation and amortization $110 - $120

Interest Expense, net of Capitalized Interest ($Millions)

Interest expense $42.0

Capitalized interest (13.0)

Interest expense, net of capitalized interest $29.0

Effective Tax Rate 37%

Wtd. Average Share Count (Millions)

Diluted 71.8

Capital Expenditures

Aircraft capital expenditures(5) $530

Other capital expenditures 100

Gross capital expenditures(4) $630

Anticipated proceeds from issuance of long-term debt and

sale/leaseback transactions $456

Other Working Capital Requirements

Payments for heavy maintenance events(5) $110

Pre-delivery deposits for flight equipment, net of refunds $218

Pre-paid maintenance deposits, net of reimbursements $35

Footnotes

1. Excludes special items which may include loss on disposal of assets, and special charges.

2. Excludes all components of fuel expense, loss on disposal of assets, and special charges or credits.

3. Includes fuel taxes and into-plane fuel cost.

4. Includes amounts related to 12 aircraft delivered in 2016, including $154 million that was funded as pre-delivery deposits in prior years that was held by the aircraft manufacturer.

5. Payments for heavy maintenance events are recorded as Long-term deposits and other assets within "Changes in operating assets and liabilities," on the Company's cash flow statement.

Spirit Airlines, Inc.

Aircraft Delivery Schedule (net of Scheduled Retirements) as of February 9, 2016 A319 A320 CEO A320 NEO A321 CEO A321 NEO Total

Total Year-end 2015 29 42 - 8 - 79

1Q16 - 1 1 3 - 5

2Q16 (2) 2 1 2 - 3

3Q16 (1) - 1 2 - 2

4Q16 - - 2 2 - 4

Total Year-end 2016 26 45 5 17 - 93

2017 (4) 8 - 8 - 12

2018 (5) 2 6 5 - 8

2019 (1) - 3 - 10 12

2020 (7) - 13 - - 6

2021 (4) - 18 - - 14

Total Year-end 2021 5 55 45 30 10 145

Notes:

Includes aircraft on firm order as well as 5 leased A320neo aircraft.

2017 reflects scheduled deliveries of 8 A320ceo and 10 A321ceo aircraft, net of 2 A321ceo lease expirations.

Seat Configurations

A319	145
A320	178/182
A321	218/228

Note: We have been notified by our third-party lessor that the delivery of one or more of the A320neos scheduled for delivery in 2016 may be delayed until 2017.

Forward-Looking Statements

Statements in this release and certain oral statements made from time to time by representatives of the Company contain various forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended (the Securities Act), and Section 21E of the Securities Exchange Act of 1934, as amended (the Exchange Act) which are subject to the "safe harbor" created by those sections.

Forward-looking statements are based on our management's beliefs and assumptions and on information currently available to our management. All statements other than statements of historical facts are "forward-looking statements" for purposes of these provisions. In some cases, you can identify forward- looking statements by terms such as "may," "will," "should," "could," "would," "expect," "plan," "anticipate," "believe," "estimate," "project," "predict," "potential," and similar expressions intended to identify forward- looking statements. Forward-looking statements include, without limitation, statements regarding the Company's intentions and expectations regarding the delivery schedule of aircraft on order, guidance and estimates for the first quarter and full year 2016 including expectations regarding the delivery schedule of aircraft on order, announced new service routes, revenues, cost of operations, operating margin, capacity, CASM, CASM ex-fuel, fuel expense, economic fuel cost, expected unrealized mark-to- market gains or losses, capital expenditures and other working capital requirements, aircraft rent, depreciation and amortization, fuel hedges and tax rates. Such forward-looking statements are subject to risks, uncertainties and other important factors that could cause actual results and the timing of certain events to differ materially from future results expressed or implied by such forward-looking statements.

Factors that could cause or contribute to such differences include, but are not limited to, those identified below. Furthermore, such forward-looking statements speak only as of the date of this report. Except as required by law, we undertake no obligation to update any forward-looking statements to reflect events or circumstances after the date of such statements. Additional risks or uncertainties (i) that are not currently known to us, (ii) that we currently deem to be immaterial, or (iii) that could apply to any company, could also materially adversely affect our business, financial condition, or future results. You should carefully consider the risks described below and the other information in this report. If any of the following risks materialize, our business could be materially harmed, and our financial condition and results of operations could be materially and adversely affected. References in this report to "Spirit," "we," "us," "our," or the "Company" shall mean Spirit Airlines, Inc., unless the context indicates otherwise. Additional information concerning these and other factors is contained in the Company's Securities and Exchange Commission filings, including but not limited to the Company's Annual Report on Form 10-K, Quarterly Reports on Form 10-Q, and Current Reports on Form 8-K.