Korean Air has finalized an agreement with Boeing to order 20 787 Dreamliner airplanes – including 10 each of the 787-10 and 787-9 models – valued at $6.3 billion according to list prices.

Along with an agreement to lease 10 additional 787-10 jets from Air Lease Corporation, the carrier will quadruple its Dreamliner fleet as it looks to bring greater efficiency and passenger comforts to its operations.

Korean Air, one of the largest transpacific carriers in Asia with 16 non-stop routes to North America, is adding the 787-10 to its long-haul fleet to complement its existing 787-9 and 777 airplanes.

Korean Air announced its commitment to order the 20 Dreamliner jets and lease 10 more at the Paris Air Show in June. The airline plans to deploy the 787-10 on medium-range routes, while continuing to leverage the longer-range capabilities of the 787-9 Dreamliner on long-haul flights.