Regulation FD Disclosure.

Allegiant Travel Company ("the Company" or "Allegiant") management is presenting March 17, 2026, at the J.P. Morgan Industrials Conference. Ahead of this presentation, Allegiant is providing an update on its first quarter 2026 financial guidance, previously provided on February 4, 2026.

Since the Company's prior first quarter 2026 financial guidance, the demand environment has outperformed expectations. Allegiant now expects first quarter 2026 to represent a record quarter for total revenue, despite Allegiant's expectation that system capacity will be down approximately 5.5 percent year-over-year.

Fuel prices have increased significantly since the beginning of the quarter due to geopolitical factors. As a result, the Company now expects its first quarter fuel cost per gallon to be approximately $3.00, compared with its previous guidance of $2.60.

The Company expects strong first quarter revenue performance to more than offset higher fuel costs and is raising its first quarter adjusted earnings outlook as provided below. This outlook reflects the Company's current assessment of the impacts from the major winter storm affecting parts of the U.S. through March 16, 2026, though additional impacts could arise.

Given the recent volatility in fuel prices, the Company is not updating its full-year outlook at this time and will provide an updated view as fuel price trends become clearer.

The table below summarizes the Company's updated first quarter 2026 financial guidance:

The below guidance is for Allegiant on a stand-alone basis and excludes any contribution from our planned acquisition of Sun Country

1st Quarter 2026 MetricCurrent GuidancePrevious Guidance
System ASMs – year over year change(~5.5%)(~5.7%)
Scheduled service ASMs – year over year change(~5.7%)(~5.7%)
Fuel cost per gallon$3.00$2.60
Adjusted operating margin (1)13.5% to 14.5%12.0% to 15.0%
Adjusted earnings per share (1)$3.25 to $3.75$2.50 to $3.50

(1) Denotes a non-GAAP financial measure, which excludes special charges, and for which no reconciliation to GAAP is provided as described below.