Moody’s Investors Service has affirmed all of its debt ratings of Delta Air Lines, the agency said.

“The affirmations reflect the progress Delta has made in reducing debt and financial leverage in the past 24 months and signals Moody's conviction that Delta will continue to strengthen its credit metrics during the next 24 months,” said Moody’s lead analyst Jonathan Root.

Moody’s affirmed Delta’s debt ratings including the Baa3 senior unsecured, the Baa2 senior secured assigned to the company's slots, gates and routes financing and the Baa1 senior secured assigned to the loan and notes co-issued by Delta and subsidiary SkyMiles IP Ltd that is secured by the company's SkyMiles loyalty programme.

Moody's also affirmed the ratings assigned to six enhanced equipment trust certificates, changing the ratings outlook to positive from stable.

The full report on Delta, which operates flights to Bermuda, can be found here.