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The airline said it expects unit revenue to rise as much as 3% in the third quarter over the same period last year, up from a previous forecast of a decline of as much as 2%, helped in part by rebooking passengers who were originally flying on airlines affected by July's CrowdStrike outage.

The carrier also said it would add Bob Fornaro, a well-respected industry veteran who previously led Spirit Airlines , to its board of directors. Southwest and Fornaro go back more than a decade. He had served as CEO of AirTran, the airline Southwest combined with in 2011, and was a consultant to Southwest after the merger.

Southwest executives are presenting their vision for the company's future at the airline's Dallas headquarters on Thursday in an investor day presentation. CEO Bob Jordan and Southwest's other senior leaders are under increasing pressure from Elliott, which has called for a leadership change at the carrier.

Southwest executives will try to convince investors that it is on the right track to boost profits and increase revenue. Over the summer, it unveiled dramatic changes to its more than half-century-old business model, including assigned and extra-legroom seats, which could generate more revenue for the carrier.

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