The deal to create the country's fifth-largest carrier is facing a high hurdle with federal regulators.
The results of the vote were announced by the company. The plan for a cash-and-stock deal to merge with Frontier Airlines was derailed by an all-cash offer from JetBlue.
The transaction is expected to be completed in the first half of the first decade of the 21st century.
They need to convince federal regulators that the agreement won't hurt competition or cause fares to go up.
The Biden administration believes that deals will hurt consumers. In Boston, the Justice Department is trying to get rid of the existing partnership with American Airlines.
If the takeover is approved, the Spirit brand, known for its ultra-low airfares and bare-bone service with fees for add-on bags, will no longer exist. The New York-based carrier has more space on board and on some planes.
Ted Christie, CEO of Spirit Airlines, said that this was an important step in the path to closing a combination that will create the most compelling national low-fare challenger to the dominant U.S. carriers. As we work to complete the transaction and deliver value to Team Members, Guests and stockholders, we will continue our discussions with regulators.