On May 4, 2006, Hawaiian Airlines expanded service between the US mainland and Hawaiʻi in anticipation of the induction of four additional Boeing 767-300 aircraft, primarily focused on expanding non-stop service to Kahului Airport from San Diego, Seattle, and Portland. Additional flights were also added between Honolulu and the cities of Sacramento, Seattle, and Los Angeles.
Often the companies combine IT operations, or purchase fuel and aircraft as a bloc to achieve higher bargaining power. However, the alliances have been most successful at purchasing invisible supplies and services, such as fuel. Airlines usually prefer to purchase items visible to their passengers to differentiate themselves from local competitors. If an airline's main domestic competitor flies Boeing airliners, then the airline may prefer to use Airbus aircraft regardless of what the rest of the alliance chooses.