Originally Posted by Camflyer

I spent years on Blue flying to the US 4 times a year and never got anywhere near Silver - until I discovered a secret.

If you look at the booking page on BA.com you will see
Ticket type: Lowest price or Flexible condition

but if you login to your account you will see
Ticket type:
Lowest price (earning reduced Tier Points)
Lowest price (earning full Tier Points)
Flexible conditions (earning full Tier Points)

The middle one is the passport to Silver.. .