I need 20TP for one of the kids to retain silver, and I want to take advantage of a little family weekend in UK to get them.
Unfortunately for the flights I need, BA is offering only O class online.
Is there a way to know in advance the price difference between fare classes without EF premium access and without phoning BA?
I would like to know in advance if It's cheaper to upgrade the O class or book one way in CE and the other in ET.