Originally Posted by
Dave Noble
I find it hard to believe that the airline would be unable to force payment based on the journey actually undertaken rather than what was paid for. Trying to avoid paying the correct fare for the journey doesn't seem to be something that would expect courts to support
In practice it's very complicated if one isn't BAEC member. Collecting the fare difference requires that they have enough information (address etc) to be able to send the bill which they often won't have if tickets are bought through OTA and paid through online banking.