With this TP calculator for British Airways you can quickly and easy calculate the amount of Tier Points (TP) you will earn on your complete itinerary. Just input your flight itinerary by typing the IATA airport codes of the airports you will consecutively visit during your trip, separated by a - character.
Example: When your itinerary is Amsterdam to Los Angeles with a transit in London, you will enter the following string into the BAEC TP calculator input box:AMS-LHR-LAX
This will give you the amount of Tier Points you will earn for a one way trip. For a return trip just complete the search query by entering the airports in the reverse order:AMS-LHR-LAX-LHR-AMS