Discount carrier says a merger would be a better path out of bankruptcy for Spirit, which has rebuffed the latest proposal.

Frontier had pitched the bankrupt airline on a coupledom that it claimed would have created a formidable low-cost competitor in the battle for passengers against American Airlines, Delta, Southwest, and United. While Spirit said a merger could create a “potent competitor in the marketplace” they’re just not that into it.

Frontier Airlines hoped to create a low-cost airline giant, but Spirit isn’t interested—at least, not at this price. Spirit Airlines has rejected a merger offer with Frontier as it prepares to exit bankruptcy.