The upgrades go in segments, where each segment is determined by the number of miles that the flight is. Thus, you may be able to upgrade for a few thousand filght miles if flying from New York City to Boston, but it will cost you a lot of miles to upgrade if flying from New York City to Tokyo. Check out the AA.com website for details, or call them for a specific answer.
It depends where you are flying from and where you are flying to. It also depends on the time of year.
China Airline's frequent flyer program is called Dynasty Flyer. Partner airlines are Mandarin Airlines and China Southern Airlines.
You will earn points with each flight you make on American Airlines. You can then redeem the points for flights or for upgrades on flights.
The program is called OnePass - 25000 gets you silver elite, 50K gets you Gold Elite and 75K gets you Platinum Elite and they have just introduced another tier
No you can't, they aren't part of the same company.
Apply on the airlines website
The vast majority of the major airlines around the world have frequent flier programs.
The easiest way is to apply on-line at the airlines website.
American Airlines Advantage, Delta Sky Miles, and US Airways Dividend Miles are rated as very good programs by Business Travellogue. The tell you what the rewards are and how to get them at http://www.businesstravellogue.com/best-frequent-flyer-programs.
First you have to take into consideration various factors such as the required credits, credit expiry and rewards available. Many people prefer American Airlines as it's the first and largest frequent flyer program.
There are roughly 20 different airlines that are partners in the WorlPerks Frequent Flyer Program. Some of the included airlines are: Aloha, Horizon Air, Kenya, and Trans States. There are a number of hotels and rental car companies that also participate.
All frequent flyer numbers for Emirates Airlines consists of 7 numbers and begin with the number 6. An example is; 6834214.
All of the major airlines allow you to give your frequent flyer miles to friends and family or transfer the miles to another account holder with the same airline