This morning, United Airlines announced new services from the mainland to the Hawaiian Islands that will begin later this year.
For HNL, United will launch daily 737-724 service from SNA on May 6th. This will be the airline's eighth mainland gateway. The last service between SNA and HNL was with Aloha Airlines, that operated from 2000 to March 2008, when the airline shutdown.
For OGG, United will launch four-times-weekly 767-300ER service from EWR on June 3rd. EWR will be United's fifth gateway to serve Kahului.
For KOA, United will launch four-times-weekly 787-8 service from ORD, also beginning on June 3rd. ORD is fourth gateway to serve Kona.
Further information is in this United Airlines press release.