JetBlue Airways told staff this week that it will cut some routes and service as it struggles to return to profitability and grapples with the fallout of its blocked plan to buy Spirit Airlines.JetBlue said it will stop flying from New York's John F. Kennedy Airport to Portland, Oregon, and to San Jose, California, and from Westchester, New York, and Martha's Vineyard, according to an internal memo, which was reviewed by CNBC. The airline will also suspend service from New York to Ponce, Puerto Rico, and to ...