Suggest me a long lasting blooming cattleya!

[Leafmite]

These Cattleyas do exist. Some Cattleyas are always putting out new growths and bloom on the new growths. Other Cattleyas bloom twice a year and have flowers that last six weeks. One of the first orchids I owned, bought in terrible shape from a florist bloomed twice a year and the flowers always lasted six weeks. It is one that I lost to Calcium deficiency. The name was in Chinese and I haven't seen anything in English with the same appearance or name. I had another, nameless, from the same florist, that kept sending out new growths and they would bloom as soon as they reached maturity (lost that one, too, to Calcium deficiency, same time). If you have a vendor that really knows Cattleyas, call them and tell them what you want and ask them to recommend one.

[SouthPark]

The mileage of a flower during bloom time - can depend on temperature, aside from other factors. I read that catts having their flowers open in the cooler times of the year can last a fair bit longer than than in the hotter times. But I guess humidity and the type of catt matters too.