Originally Posted by
Sailbot3310
You can't upgrade from economy HBO to economy plus... I learnt the hard way. You gotta cancel the booking and remake it (if in 24 hours). I made the same mistake as you, thinking we only wanted one checked bag and it would be cheaper to just buy a bag.. Ironically it cost is £20 more to fly with 1 bag than if we purchased plus and had 4....
Correct, it is a different ticket, it's not some sort of supplement. Moreover, if you try to structure it so that only the adults get the allowance, and the kids stay HBO (or vice versa) they are going to end up on separate reservations too. Now that's a small risk, but in theory if there was an irrop the computer may do different things to different reservations. But if inside the first 24 hours then you can revise the reservation without paying any fees for the privilege.
If you are more than 24 hours then you can cancel the ticket and rebook from fresh, but that won't be cost effective either.
If you have 4 large cases, you need to buy a bag each. HBO does allow a car seat for kids for free.