United Airlines has a new friend in Queens.

This time the airline returns to John F. Kennedy International Airport in New York again through a partnership with JetBlue Airways.

The partnership, known as Blue Sky, will enable JetBlue customers to earn frequent miles on United and vice versa. It also includes mutual loyalty advantages such as priority boarding boards and more spacious seating for travelers with elite identities.

Some aspects of the partnership announced by the airline on Thursday will begin in the fall, although the airline does not provide a definite timing. They also did not provide financial details of the transaction.

JetBlue leaders have long said they need to build partnerships to better compete with major airlines like Manchester United and share rival Delta Airlines.

The new partnership is inadequate, and it is not until JetBlue's flight coordination in Northeastern's former alliance with American Airlines, which was knocked down by federal court two years ago for antitrust fields. Last year, a judge blocked JetBlue's plan to buy a struggling budget operator spirit.

"The partnership with United is a bold step in the industry, which brings together two customer-centric airlines to provide travelers with more options and deliver value in our network," JetBlue CEO Joanna Geraghty said in a press release.

United left Kennedy International Airport in 2015, and current CEO Scott Kirby called it a mistake because moving transcontinental flights to Newark allowed Americans to win some corporate clients. The company usually returns briefly in 2021 as traffic rates settle at the airport, which is usually under strict control of the Federal Aviation Administration.

United left Kennedy International Airport again in 2022 because it couldn't get a long-term slot there.

Kirby repeatedly said he wanted the airline to return to Kennedy International Airport. The airline has struggled with airborne shortages and congestion in its Newark hub in recent weeks.

Under the new agreement, United will be able to fly up to seven daily round trips at the crowded Kennedy Airport, offering more breadth in the New York City area, although the new operations will still be doubled by the main hub of the Federation of Liberty International Airport in Newark, New Jersey.

The carrier said Manchester United's Kennedy flight will begin as early as 2027. Meanwhile, JetBlue will receive eight flights in Newark. United didn't say which route it plans to run at Kennedy International Airport, although its last business was for Los Angeles and San Francisco.

Their airline calls swaps "a network-based sex exchange."