After a failed attempt at merging with JetBlue (JBLU), ultra-low-cost carrier Spirit Airlines (SAVE) is reportedly turning back to a familiar frenemy.

Spirit Airlines’ stock swelled by 60% on Monday, on track for the low-cost airline’s best day since going public, after the carrier announced an extension to refinance its debt while temporarily avoiding the threat of bankruptcy.

Shares of Spirit Airlines surged as much as 46% on Monday after the ultra low-cost carrier reached a deal with its credit card processor to extend a debt refinancing deadline by two months until Dec.

The low-cost carrier has extended the deadline on its existing debt refinancing plan with credit card processors Visa and Mastercard, causing its stock to soar. After concern mounted earlier this month that Spirit Airlines was set to announce bankruptcy,

Spirit Airlines Inc.’s shares soared the most in 13 years of trading after the carrier secured more time to address a troublesome debt load that has raised the prospect of bankruptcy.

Spirit Airlines shares soared by as much as 65% on Monday after the budget airline struck a deal to extend its debt refinancing plan by two months. The agreement with US Bank National Association to push the deadline — which was set to expire Monday — until Dec.

Spirit Airlines announced that on October 11, it modified its card processing agreement to extend the deadline for its 2025 notes from October 21 to December 23 and the early maturity date from December 31 to March 3.