South West Airlines is the only major carrier in the United States to have an international carrier in its fleet.
The Hawaiian Airlines group of airlines operates between Hawaii and the mainland United States.
Hawaiian’s most recent aircraft have been built in China and Australia.
Since the airlines have no domestic routes, they make up the bulk of the nation’s air traffic.
Their largest route to the U.S. is the Alaska Airlines route to Honolulu, which carries a few hundred passengers a day.
American Airlines has the largest domestic carrier in Hawaii, Hawaiian Airlines, which is operated by Hawaiian’s parent company, Hawaiian Holdings, the Hawaiian Islands-based airline said in a statement.
On Tuesday, the airline said its first flight from Honolulu to Honolulu-Honolulu International Airport had a capacity of 8,500, which would be the highest capacity for the Hawaiian route, according to its website.
More from Business Insider:The airline also said it plans to add one more Hawaiian route to its fleet by 2019.
Other carriers that offer domestic flights to Honolulu include Hawaiian Airlines’ sister carrier, American Airlines, Hawaiian Pacific, Hawaiian Air, Hawaiian Star and Hawaiian Airlines Express.
And a Hawaiian Airlines flight from Anchorage to Seattle departed Tuesday.
Hilton Hawaiian, the UAL airline, announced in May that it would begin flying to Hawaii from Anchorage.
A Hawaiian Airlines plane lands at the Honolulu International Airport in Honolulu, Hawaii, May 12, 2020.
A Hawaiian Airlines Boeing 737, registered to the Hawaiian Airlines family, takes off in Anchorage, Alaska, May 10, 2020.(AP Photo/David Goldman)The carriers operate flights in the Honolulu-Kona International Airport, which has a capacity that would be three times the average domestic airline’s daily passenger volume, according the UIAA.
Airline capacity is defined as the number of seats a passenger can fit in a plane.
When the airlines were operating in the 1950s, the airlines had the largest fleet of domestic flights, according a report from the aviation consultancy FlightAware.