Hawaiian Airlines is expanding service between Oakland and the islands early next year.

The state’s largest carrier said today it will increase flights to daily service, from four times a week, between Oakland and Honolulu beginning Jan. 5. Additional flights on the route may be available in December of this year depending on aircraft availability, the airline added.

Hawaiian also will offer seasonal service between Oakland and Kauai three times a week and between Oakland and Kona four times a week. The 10-week neighbor island service will start June 14 and run through Aug. 15, adding a total of 18,200 seats. 

The airline said its daily service between Oakland and Kahului will continue with slightly adjusted times beginning in January.