I've been looking to book a return CPH-ATH-TLV with A3 to get my 4 sectors and found very reasonable tickets at 175 EUR. The tickets book into P in Go Light, so cannot use the upgrades. Am a bit unsure whether it is worth it to spend the extra euros - about 40 each way - to getting a flex fare ticket, as the upgrade is still uncertain and I'll most certainly be waitlisted. I'm already quite impressed with A3 in Y and I'll have lounge access in Athens already. Any input?
FWIW I've been doing some research and it seems the fare bucket changes to category S at 125 EUR per way, at least for this particular route. Don't know if anyone has other experience as to how cheaply a Go Light-ticket not in U, P or T class can be bought?