WASHINGTON — JetBlue Airways Corp. got a great deal on its latest aircraft purchase from Airbus, according to Moody’s Investors Service. The carrier probably paid $1.4 billion to $1.7 billion for 60 Airbus A220-300 jets, or between $23 million and $28 million per plane, Moody’s analyst Jonathan Root said in a report Friday, citing estimates by appraisers and price breaks that are typical for large orders.