Spirit Airlines said Thursday that it had again delayed a shareholder vote on its proposed acquisition by Frontier Airlines, allowing it to continue discussions with Frontier and with JetBlue Airways, which has made a rival bid.
The vote, which was to take place Friday morning, was rescheduled for July 15.
The postponement is the third time in a month that Spirit has pushed back the vote as it has repeatedly spurned JetBlue, arguing that antitrust regulators would probably reject a combination…