The airline plans to fly the planes between Boston and Tokyo starting April 22. It later plans to add flights between San Diego and Tokyo.
The airline has ordered 45 of the jets. Boeing has booked orders for 873 of the planes altogether. It delivered the first 787s last fall to JAL competitor All Nippon Airways (ANA). Those planes are being flown in Asia. United Airlines will be the first U.S. carrier to get one, later this year.
The 787s delivered Monday are the first with GEnx-1B engines. Boeing got U.S. government approval for those engines on the 787 just last week. The planes for launch customer ANA are equipped with the other engine option, the Rolls-Royce Trent 1000.