It is difficult determining a pigeons' exact age. (at least for me).
On older pigeons the cere seems to grow larger. In your picture, the cere is somewhat on the small size.
I would take a guess that it may be around 1 year old.
Here is how I come up with that.
If it is a feral pigeon, it is in its early years. Ferals usually don't live much longer than 3 or 4 years. Reason for short lifespan,,,,, Nutrition in the wild is limited.
If it is a loft runaway, than most-likely a young one that had difficulty finding home.
Loft raised pigeons can live 15 years or longer.
Generally speaking, older birds prefer to fly less than young ones. This is from my experience when I had young ones, and some seasoned ones. The young ones loved to fly. The seasoned (senior citizens) just flew a little and then chilled in my treetops. or rooftop.
On older pigeons the cere seems to grow larger. In your picture, the cere is somewhat on the small size.
I would take a guess that it may be around 1 year old.

Here is how I come up with that.
If it is a feral pigeon, it is in its early years. Ferals usually don't live much longer than 3 or 4 years. Reason for short lifespan,,,,, Nutrition in the wild is limited.
If it is a loft runaway, than most-likely a young one that had difficulty finding home.
Loft raised pigeons can live 15 years or longer.
Generally speaking, older birds prefer to fly less than young ones. This is from my experience when I had young ones, and some seasoned ones. The young ones loved to fly. The seasoned (senior citizens) just flew a little and then chilled in my treetops. or rooftop.