As part of its plan to stay competitive in reaction to the entry of Southwest Airlines into Denver, the company underwent a reorganization early in 2006. On April 3, 2006, Frontier created Frontier Airlines Holdings (FRNT), a holding company incorporated in Delaware to take advantage of favorable tax laws in that state. The corporate headquarters did not leave Colorado.
The TWA Hotel is the TWA Flight Center structure currently being rebuilt as 505-room hotel, preserving the Eero Saarinen headhouse while replacing the structures on either side of the headhouse. Situated in front of JetBlue's JFK terminal, JetBlue has stated that it estimates the ownership of the hotel would be between 5–10% of the final total investment. The hotel will be an effective replacement for the Ramada Plaza JFK Hotel on the north end of the airport grounds in Building 144, which closed in 2009.
Frontier has a three-tier frequent flyer status program. The tiers are Elite 20K (earned by flying 20,000 Status Qualifying Miles [SQM] or 25 segments in a calendar year), Elite 50K (50,000 SQM or 50 segments), and Elite 100K (100,000 SQM or 100 segments). Elite benefits include free carry-on and checked bags, advance seat assignment and family seating, priority boarding, redemption fee waiver, stretch seating, Discount Den membership, and mileage multipliers.
ABX Air Air Cargo Carriers Air Transport International AirNet Express Alaska Central Express Aloha Air Cargo Alpine Air Express Ameriflight Amerijet International Ameristar Jet Charter Asia Pacific Airlines Atlas Air Baron Aviation Services Bemidji Airlines Castle Aviation Corporate Air CSA Air Empire Airlines Everts Air Cargo Express One International FedEx Express Flight Express Freight Runners Express Kalitta Air Kalitta Charters II Lynden Air Cargo Martinaire Merlin Airways Mid-Atlantic Freight Mountain Air Cargo National Airlines Northern Air Cargo Polar Air Cargo Royal Air Freight Ryan Air Services Sky Lease Cargo Southern Air Tepper Aviation Transair UPS Airlines USA Jet Airlines West Air Western Global Airlines Wiggins Airways
On January 11, 2007, Frontier Airlines signed an 11-year service agreement with Republic Airlines. Under the agreement, Republic was to operate 17, 76-seat Embraer 170 aircraft for the former Frontier JetExpress operations. At the time the contract was canceled in April 2008, Republic Airlines operated 11 aircraft for Frontier Airlines, with the remaining six aircraft expected to join the fleet by December 2008. With the integration of Republic aircraft, the 'JetExpress' denotation was removed. Subsequent to the cessation of Horizon's services for Frontier in December 2007, all flights operated by Republic were sold and marketed as "Frontier Airlines, operated by Republic Airlines." The first market created specifically for the Embraer 170 was Louisville, Kentucky, which began on April 1, 2007. Service to Louisville was suspended in August 2008 but restarted in April 2010.
On October 22, 2008, jetBlue opened its new primary hub at John F. Kennedy International Airport (JFK), Terminal 5, or simply T5. The mostly new terminal, costing approximately $800 million, partially encircles the historic TWA Flight Center, the former Trans World Airlines terminal designed by Eero Saarinen, which remains closed. According to the plan, passengers will eventually be able to check in for flights in the landmark building, then transfer to the new structure via the original passenger departing-arrival tubes from Saarinen's original terminal and its 1969 addition by Roche-Dinkeloo.
On July 24, 2007, jetBlue reported that its second-quarter revenue increased to $730 million, compared to $612 in 2006. Second quarter net income grew to $21 million for the quarter, from $14 million the previous year. CEO David Barger said the airline will take delivery of three fewer planes this year and will sell three planes from their current fleet, "slowing capacity growth ... to strengthen our balance sheet and facilitate earnings growth", but will continue to add two to four new destinations each year.