Originally Posted by
corporate-wage-slave
No it's not, as far as a I know. There is a somewhat utility-free provision to get space on flights which are full but you certainly have to pay significantly for that, in the unlikely event you can get it to work.
Same Day Change applies to many shorthaul flights, not a Gold benefit.
Avios bookings are changeable up to 24 hours before original departure (fees apply).
Some Avios extra availability shows up for Golds, but typically over the middle distance and in WT/ET only, and on BA metal only.
Avios redemptions do often show up on the day of departure, but if you have a booking already and you're within 24 hours this rarely helps.
I fly AMS->UK a lot, and late in may well use 4500avios+30euro versus 300euro or so per paid Y 1w ticket OR 9000avios+30euro for 1-w J seat.
Just 2weeks ago I asked the AMS BA team 3hr before flight at airport before heading to checkin lines, about avios ticket and swapping AMS-LHR for AMS-LGW as departing 5mins apart, and my train travel after landing for me (going to Croydon) from LGW was 20mins versus 100mins from LHR
Staff happily looked (tried) for me BUT apparently they could not,
but only as as I was on award ticket AMS-LHR
and the AMS-LGW had no award seats left .... else BA staff said they would have swapped me foc