Hi, Despite extensive reading of this thread I am still confused by the fare codes.

I am a United 1K and want to be able to find which flights I can use my Global Premier Upgrades on before I book and pay for the flight.

When looking at the flights I see various letters and numbers after them. Which of the letters means I can use a GPU and does the number after the letter indicate the number of seats available ?


Your help in producing an idiot guide for people like me would be appreciated.