our investment in and joint venture with Virgin Atlantic, improvements at our hubs at LaGuardia and JFK in New York and the creation of an international gateway in Seattle.  

 

Virgin Atlantic Investment. In 2013, we purchased a 49% interest in Virgin Atlantic from Singapore Airlines for $360 million. We also entered into an agreement with Virgin Atlantic with respect to operations on non-stop routes between the United Kingdom and North America. In September 2013, the U.S. Department of Transportation granted antitrust immunity on these routes.The antitrust immunized relationship allows for joint marketing and sales, coordinated pricing and revenue management, network planning and scheduling with respect to operations on routes between North America and the United Kingdom. Virgin Atlantic has a significant presence at London's Heathrow airport, the airport of choice for business travelers traveling to and from London. Along with our state of the art facility at JFK, we believe our relationship with Virgin Atlantic will provide our customers with superior service and connectivity between New York and London. Beginning January 1, 2014, we began working under the immunized relationship and published our first coordinated schedule that becomes effective April 2014.  

 

LaGuardia. During December 2011, we closed transactions with US Airways in which we received takeoff and landing rights (each a "slot pair") at LaGuardia in exchange for slot pairs at Reagan National. This exchange allowed us to create a new domestic hub at LaGuardia. We have increased capacity at LaGuardia by approximately 50% since March 2012, adding 123 new flights and a total of 31 new destinations. We currently operate about 277 daily flights between LaGuardia and 65 cities, more than any other airline.  

 

We are investing approximately $200 million in a renovation and expansion project at LaGuardia to enhance the customer experience. In 2012, we opened the connector linking Terminals C and D and a new SkyClub in Terminal C. We are also expanding security lanes and a baggage handling system in both terminals as well as an enhanced SkyClub in Terminal D.  

 

JFK. While our expanded LaGuardia schedule is focused on providing industry-leading domestic service, we are optimizing our international and trans-continental flight schedule and undertaking a redevelopment project at JFK to facilitate convenient connections for our passengers and improve coordination with our SkyTeam alliance partners. Prior to beginning the redevelopment project, we primarily operated domestic flights out of Terminal 2 and international flights out of Terminal 3. Our initial five-year project to expand and enhance Terminal 4, which began in 2010, is on schedule. We have constructed nine new international gates in Terminal 4, which opened in 2013. We have relocated our operations from Terminal 3 to our newly constructed facilities at Terminal 4 and have begun the demolition of Terminal 3. During 2013, we announced plans for an additional $180 million expansion project that will add 11 more gates at Terminal 4. With the additional expansion, we will relocate our regional jet operations from