Alaska Airlines is now the fifth carrier to order a split-tip scimitar winglet to retrofit on the Boeing 737NG.
The deal with Aviation Partners Boeing calls for installing the fuel-reducing devices on 111 aircraft in the Alaska Airlines fleet.
The contract covers all of the carrier’s 737-900ERs and most 737-800s and 737-900s, Alaska Airlines says.
Aviation Partners Boeing will begin the installations for Alaska Airlines early next year and complete the work in 2017.
The winglet should save $20 million a year by reducing fuel consumption by 220,000l (58,000gal) per aircraft, Alaska Airlines says.
United, UPS, TUI Travel and Copa Airlines also have ordered the split-tip scimitar winglet for 737NGs.
The new configuration adds strengthened spars, scimitar-shaped caps and a large ventral strake to the original blended winglets.
The design is expected to improve the aerodynamic efficiency in the outboard section of the wing.