Delta plans to acquire United's slots at JFK. In turn, United plans to acquire Delta's slots at Newark. Both transactions have yet to receive regulatory approval.  According to Delta spokesman Anthony Black, United will not acquire all of Delta's slots at Newark. He told CNBC that there would be a "net neutral" change in the number of flights it operates from that airport as a result of the deal.  Shares of Delta closed down about 0.3 percent Tuesday.  The changes may also cut costs. United's chief revenue officer, Jim Compton, said the airline expects to reduce staffing as part of the consolidation, although it will work with unions to find workers alternative jobs. The airline currently employs about 200 airport operations workers and about 70 technicians at JFK, he said.  United has criticized the Port Authority of New York and New Jersey for charging flight fees at Newark that it thinks are too high. Compton said the airline will continue to advocate that "costs are equitable and used appropriately in the area."  Read MoreAirline woes shouldn't trouble the market  The airline will maintain its service at New York's LaGuardia Airport.  JFK is operated by the Port Authority. It is one of the largest airports in the country with six operating terminals and more than 125 aircraft gates that serve them. In 2013, JFK surpassed 50 million annual passengers for the first time in its history, according to the Port Authority.  According to a release, United Airlines, along with United Express, operates an average of nearly 5,000 flights a day to 373 airports across six continents.  —CNBC's Reem Nasr contributed to this report.
United Airlines said on Tuesday it plans to end service at New York's John F. Kennedy Airport, where it failed to profit over seven years.