- JetBlue has around 30% market share at JFK, around 5% market share at LGA, and around 5% market share at EWR
- Delta has just under 50% market share at JFK, around 50% market share at LGA, and around 5% market share at EWR
- American has around 20% market share at JFK, around 25% market share at LGA, and around 5% market share at EWR
- United has 0% market share at JFK, around 5% market share at LGA, and around 80% market share at EWR
And keep in mind JetBlue’s route structure. 30% market share in JFk to one largely one market in the SouthEast. It would be extremely easy for DAL to nail the coffin shut.