Originally Posted by
HarryKUK
In that case what exactly is flexible about the ticket? If the entire NYC-SIN sector was amended by a few days, would that have been without additional surcharges (assuming same booking class is available)?
The fact that you can make a change, even if you have to pay any difference in fare and additional ADP (UK tax) if you introduce a UK stop over of >24 hours.
BA also sell I fare in Club which, from the UK at least, are entirely inflexible - use it or lose, no change allowed.
In between I and J BA sell various fares that permit changes for a fee and fare difference, or just the fare difference, until you get to J fares which are entirely flexible with nothing else to pay.