The best way to get upgraded is to book a "guarantee". Rather than choosing a specific cabin, you choose which category of cabin you require. The guarantee is that you will get -at least- a cabin as good as what you paid for, and perhaps one quite nicer.
The other way to get an upgrade on Celebrity is to buy an upgrade on the dock before you board. According to their literature, they subtract the brochure rate of your booked cabin from the brochure rate of the cabin you desire to determine the price of the upgrade.
Other than that, Celebrity doesn’t award upgrades very often at all.
On our last cruise on Constellation, we booked a guarantee category 9 inside, which is the best inside cabin. We were bumped up to a category 5, which is second best outside.
Since we scored so well on our guarantee upgrade, we enquired how much more it would cost us to get a verandah. We expected the price to be about $250pp, but they charged us only $150pp. So, for only $300 more than the price of an inside cabin, we got a verandah on a 14 day cruise.
Persistency at the upgrade desk on the dock will serve you well. When we first inquired about upgrades, they said the only thing available was a suite. With a little pleading from my wife, they finally found our one little verandah room. Later during the cruise, we know of two instances where passengers were involuntarily relocated into verandah cabins that were better than ours, but a lot less than the “only available suiteâ€Â.
Incidentally one relocation was due to a small fire in a cabin, and the other was due to a passenger’s illness. Illness, HA! He said he ate too much pizza and knew it would upset his sensitive stomach. When his bride (they were on their honeymoon) went to get some Alka-seltzer at 2 AM, they sent the doctor to his room. When they found he had been vomiting, they hauled her behind out into another cabin and quarantined her for 24 hours, and locked his door for 48 hours. Happy Honeymooning!!!
Point being: if you want to try your luck getting an upgrade at the port, be persistent and know exactly what you want. It’s probably available.
Good luck. Hope you do as well as we did on the upgrades.
Dan