Private membership airline Surf Air announced Monday that it will expand its service both north and south of Los Angeles – to Carlsbad in November and to Oakland in December.

Both the San Diego suburb and the Bay Area city were added based on potential member demand, and the company said more than 100 deposits have been placed for membership in those regions.

“Both markets are largely underserved by commercial carriers and hot spots for California-based business and leisure travelers,” Jeff Potter, the Santa Monica company’s chief executive, said in a statement.

Surf Air’s all-you-can-fly plan resembles that of a gym membership, with customers paying a one-time initiation fee of $500 followed by monthly dues starting at about $1,750 allowing them to fly as often as they like.

Service to Carlsbad is projected to begin Nov. 18, and flights to Oakland are expected to take off Dec. 15, the airline announced. The airline’s purchase of three Pilatus PC-12 NG propeller-driven aircraft made it possible to add the new destinations.

The new aircraft are part of Surf Air’s $312 million deal for up to 65 planes over the next five years. The company recently borrowed $65 million and raised an additional $8 million to buy the first 15 aircraft. It has options on the balance.

Surf Air currently serves airports in Burbank, Hawthorne, San Carlos, Santa Barbara and Truckee, near Lake Tahoe. It has also arranged customers’ flights to Las Vegas.