A more recent development is the airline alliance, which became prevalent in the late 1990s. These alliances can act as virtual mergers to get around government restrictions. Alliances of airlines such as Star Alliance, Oneworld, and SkyTeam coordinate their passenger service programs (such as lounges and frequent-flyer programs), offer special interline tickets, and often engage in extensive codesharing (sometimes systemwide). These are increasingly integrated business combinations—sometimes including cross-equity arrangements—in which products, service standards, schedules, and airport facilities are standardized and combined for higher efficiency. One of the first airlines to start an alliance with another airline was KLM, who partnered with Northwest Airlines. Both airlines later entered the SkyTeam alliance after the fusion of KLM and Air France in 2004.
In October 2015, Hawaiian Airlines announced that they will be upgrading their business class seats from the standard cradle seats to a 180-degree lie-flat seats on their A330 fleet in a 2-2-2 configuration. The new seats will be installed starting the second quarter of 2016. In addition to the new business class seats upgrade, the airline will add 28 additional Extra Comfort seating.