unable to upgrade online / in app

i am travelling on monday - out WT+ to LAS and back CW via LAX.

I am trying to upgrade the outbound journey, but it is saying i cant do this online.

I'm assuming the class of fare that i've bought, does not allow me to upgrade.

Will i be able to upgrade at Check in? I am BAEC silver.

All WT+ fares are upgradeable, assuming that there is availability. However, BA's systems are notorious for only being able to handle online upgrades for simple itineraries - out and back to/from the same airport and no connecting flights.

If there is inventory available for the upgrade, you'll have to phone the Silver line to obtain it. You can check if seats are available by looking for a straight Avios redemption in CW for your outbound flight - upgrades and redemptions come from the same bucket.

If you wait until check-in you won't be able to upgrade with Avios; only paid upgrades are possible at that point and you can't be certain they will be on offer. If you are looking to upgrade with cash, try phoning now to see what price they offer.

More advice in many other threads here and in the relevant post on the sticky.