Vowing to “take low-fare travel to new heights,” Spirit Airlines is moving farther away from its history as a fee-happy budget airline and will start selling tickets that include some of its most popular extras in a single bundle.

The Florida-based airline says it will offer several new ticket types, topped by a “Go Big” package that will include priority check-in, a roomier seat, snacks and drinks, a checked bag, a carry-on bag, and free Wi-Fi.

“We listened to our guests and are excited to deliver what they want: choices for an elevated experience that are affordable and provide unparalleled value,” said Spirit CEO Ted Christie.

But the changes also indicate the deep trouble with Spirit’s longtime business model.

The airline with bright yellow planes hasn’t made a full-year profit since 2019 – it has lost nearly US$2.4 billion since – leading industry analysts to mull whether a bankruptcy filing could be in Spirit’s future.

Full-service carriers Delta and United account for an outsized share of the US airline industry’s profit, and they are doing it by focusing on premium flyers while also selling bare-bones “basic economy” fares that compete with Spirit, Frontier, and Allegiant for the most cost-conscious travellers.