A one-day seminar on travel to Indonesia...

A one-day seminar on travel to Indonesia will be held June 3 from 9 a.m. to 4 p.m. at the Indonesian Tourist Promotion Office, 3457 Wilshire Blvd., Suite 400, Los Angeles, at a cost of $15 per person, including lunch.

The seminar, presented by the tourist office in association with Select Tours International and the Indonesian Consulate, will cover the various regions and cultures of Indonesia, including Bali, Java, Sumatra, Irian Jaya, Kalimantan and Komodo Island. For more information, call toll-free (800) 356-6680 or (213) 379-8999.

Regularly scheduled weekend service between Los Angles International Airport and Catalina Island is being provided by Alpha Air, which has two flights each Friday, Saturday and Sunday. The flights leave from LAX’s Imperial Terminal at 9 a.m. and 4:30 p.m. and return at 9:30 a.m. and 5 p.m. For more information or reservations, call (800) 421-9353 or (213) 417-9744.

A free lecture on island ports of the Caribbean will be presented by travel photographer and lecturer Mort Loveman at 1 p.m. on Wednesday at Roxbury Park Club House, 471 S. Roxbury Drive, Beverly Hills. For more information, call (213) 550-4761.

Weekend lecture tours from Salamanca, Spain, to Segovia, La Granja, Avila and La Alberca are part of the Los Angeles Community College District’s annual summer language program, which is divided into two sections: June 30 to July 30 and July 30-Aug. 30.

The $1,898 cost of the program includes round-trip air fare from Los Angeles to Madrid, plus lodging with a family, meals, tuition and sightseeing and cultural activities. For more information, call (818) 365-8271 or (213) 669-4434.

Elderhosteling in Portugal and the Azores is the topic of a travel lecture by Lolita M. Lowell set for 1 p.m. Thursday at the Burton Chace Park community building on Mindanao Way, Marina del Rey. Admission free. For more information, call (213) 306-8111 after 1 p.m.

The turquoise and yellow aircraft of Paradise Island Airlines, owned by entertainer Merv Griffin, recently began daily round-trip service between Miami and Ft. Lauderdale airports and the new Paradise Island airport in the Bahamas. For more information, call (800) 327-2521.

“Faces and Places of China” is the title of a slide presentation and discussion by the Bon Voyage Travel Club scheduled for 7:45 p.m. Friday in the Community Room, 9696 Wilshire Blvd., Beverly Hills. Admission is $5. For more information, call (213) 472-5726.

Braniff has moved its corporate headquarters to 9955 Benford Road, Orlando, Fla. 32827. Telephone (407) 856-8000.

Between now and Sept. 8 Air Canada is offering business travelers a half-price option on each of its North American routes, except those to or from Florida. Under the program, travelers who buy a regularly priced Executive Class ticket can receive a 50% discount on a second ticket for a spouse or other family member.

Details of motor coach and rail tours and discount fares on cruise lines will be among the topics discussed at a presentation by Los Coyotes Travel at the Sequoia Club, Orangethorpe Avenue and Beach Boulevard, Buena Park, on Thursday at 7:30 p.m. For more information, call (800) 346-4317.