01:15 PM EDT, 06/30/2025 (MT Newswires) -- (Updates with American Airlines ( AAL ) response in the fifth paragraph.)

The US Supreme Court on Monday turned away a bid by American Airlines ( AAL ) to overturn a decision that found that its former partnership with JetBlue ( JBLU ) in the US Northeast violated antitrust law, multiple media outlets reported.

The partnership, called the "Northeast Alliance," allowed the two airlines to coordinate flights and share revenue in New York and Boston, the reports said.

The Justice Department sued in 2021, arguing the deal would reduce competition and hurt consumers by removing incentives for American Airlines ( AAL ) to lower prices. A lower court agreed with the Justice Department, and JetBlue ( JBLU ) ended the alliance in 2023, according to the reports.

American Airlines ( AAL ) appealed, claiming the decision went too far and could block future business partnerships that help competition. However, the 1st US Circuit Court upheld the ruling, and now the Supreme Court has declined to review it, the reports said.

"We're disappointed but appreciate the Supreme Court's consideration," American Airlines ( AAL ) told MT Newswires via email. The airline also said that the alliance was formed with the intention of boosting competition and giving customers more choices in the Northeast.

JetBlue ( JBLU ) didn't immediately reply to MT Newswires' request for comment.

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