June 15.

The $675 round-trip tickets are on sale now and are available until May 12.

However, ticketing must be completed within 72 hours of the booking and there is a minimum stay of four days and a maximum stay of one month.

Other restrictions also apply.

There are also $881 fares available for Paris and discount rates for Frankfurt, Munich, Barcelona, Madrid, Nice, Milan, Rome, Lisbon, and Amsterdam.

BA also said it has recently upgraded the World Traveller cabin.

"Passengers will have a more comfortable ergodynamic seat with adjustable ears on the headrests which support the head while reading, sleeping, or watching television,'' said local manager Philip Troake.

"Straight ahead on the seat back in front of each passenger is a personal television screen which shows a variety of programmes on 12 channels including a flight tracker and destination information.

"The airline has also designed a two-tiered meal tray to improve presentation and if you get hungry between meals there is a refreshment bar featuring snacks and drinks.'' The BA summer schedule operates four flights a week on Tuesday, Thursday, Friday, and Saturday.