Delta Air Lines Inc. plans to add as many as 40 jetliners to refresh its fleet, reviving a plan that was scuttled earlier this year when pilots spurned a new contract agreement.

The aircraft deal will be split between new Boeing Co. 737-900ER single-aisle planes and smaller, secondhand Embraer SA E-190s, Delta said Wednesday. Delta is working with Boeing on both parts of the transaction.

“The order announced today offered Delta more compelling economics over a previously canceled order that also included Boeing-held E190s,” Delta said in a statement.

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Photo Credit: A Delta Air Lines jet lands at BWI Thurgood Marshall International Airport near Baltimore, Maryland. Gary Cameron / Reuters