FORT LAUDERDALE- The collapse of Spirit Airlines (NK) triggered a rapid reshaping of the United States domestic aviation market, particularly at Fort Lauderdale-Hollywood International Airport (FLL).
Less than a month after the ultra-low-cost carrier ceased operations, competing airlines have already moved aggressively to absorb parts of its network and passenger demand.
New schedule data for September 2026 shows that JetBlue Airways (B6) has emerged as the largest beneficiary of Spirit’s disappearance.
The carrier has added nine former Spirit routes and significantly expanded its presence at Fort Lauderdale, while several airports and city pairs continue to face notable capacity reductions.
JetBlue Gains Most from Spirit Airlines Bankruptcy
JetBlue has captured the largest share of former Spirit Airlines routes among US carriers. According to schedule data, the airline plans to operate nearly 1,300 additional flights in September across routes previously served by Spirit.
The largest increases are concentrated at Fort Lauderdale (FLL), where JetBlue historically competed directly against Spirit for leisure travelers. The added capacity lifts JetBlue’s market share at the airport from 22% in April to approximately 37% by September.
Among the former Spirit routes now operated by JetBlue are Fort Lauderdale to Houston Intercontinental (IAH), Nashville (BNA), Baltimore (BWI), Charlotte (CLT), Orlando (MCO), and Chicago O’Hare (ORD).
The airline has also entered the Newark (EWR) to Los Angeles (LAX) market, formerly served by Spirit.
Despite the expansion, JetBlue still faces strong competition from major legacy carriers, including Delta Air Lines (DL), American Airlines (AA), and United Airlines (UA). Several of the newly added routes already have established operators, which could intensify pricing competition during the fall travel season.
Industry analysts note that while JetBlue expanded rapidly, the total seat supply at Fort Lauderdale remains significantly lower than before Spirit’s shutdown.
Combined capacity previously offered by Spirit and JetBlue at the airport exceeded 637,000 seats in April, but current September schedules show roughly 425,000 seats, representing a decline of nearly one-third.
Unfilled Spirit Routes
Not every Spirit Airlines route has attracted replacement service. Five domestic routes previously operated exclusively by Spirit remain without a successor carrier, OAG flagged.
These routes include Atlantic City (ACY) to West Palm Beach (PBI), Atlantic City to Fort Myers (RSW), Fort Lauderdale to San Antonio (SAT), Latrobe (LBE) to Orlando (MCO), and Key West (EYW) to Fort Lauderdale.
The absence of replacement operators suggests these routes may have struggled financially even before Spirit suspended operations.
Smaller leisure-focused markets often depend heavily on ultra-low-cost carriers to stimulate demand with lower fares.
Atlantic City International Airport (ACY) appears among the hardest-hit airports, losing two nonstop connections with no immediate replacement.
Fort Lauderdale also lost multiple unique routes despite JetBlue’s broader expansion at the airport.
Market Share Changes
Interestingly, none of the four largest US airlines — American, Delta, United, or Southwest Airlines (WN) — have directly taken over any of Spirit’s abandoned exclusive routes so far.
Instead, JetBlue and Breeze Airways (MX) have emerged as the most active replacement operators. Breeze has added five former Spirit routes, focusing mainly on underserved leisure markets.
The restructuring highlights how quickly US airlines can adapt when capacity suddenly becomes available.
However, the broader market still reflects a meaningful reduction in low-cost seat availability, particularly in Florida-focused leisure markets where Spirit once held a major presence.
Airline analysts expect further schedule adjustments in the coming months as carriers evaluate route performance and passenger demand following Spirit’s exit from the market.
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