For the past eight years, in fact, Spirit Airlines and Frontier Airlines have been the will-they-or-won’t-they couple of the airline industry, having repeated merger discussions

Spirit Airlines shares are surging in premarket trading Wednesday on a report that Frontier Group Holdings is in the early stages of a renewed bid for its rival discount carrier.

Spirit and Frontier Airlines have restarted discussions about merging, as Spirit navigates debt restructuring and potential bankruptcy. These talks are in preliminary stages and may not result in a deal. Previous merger attempts between the two carriers were halted when JetBlue made a more appealing offer to Spirit shareholders.