JetBlue is teaming up with Brightline, the nation's first private, intercity rail operator. As part of the new initiative, JetBlue customers will be able to book itineraries that feature both a flight and a train trip.

The CEO of JetBlue denied that an upcoming collaborative effort with United Airlines presaged any sort of greater merger between the two.

JetBlue Airways CEO Joanna Geraghty said on Monday the company's partnership with United Airlines would not lead to a merger between the two carriers. The two companies last week announced a collaboration that allows travelers to book flights on both carriers' websites,