I posted this to a different forum but folks there suggested perhaps this might be a good place as well?

My fifteen-year-old daughter and I are traveling to London in April. Current lowest fares are hovering around $900 per r/t ticket. I read somewhere that the best day of the week to purchase a ticket is Tuesday night, as that is when fares may be reduced in response to weekend sales.

Also, is it more prudent to purchase tickets now, or do I have leeway (say until January)?

Any thoughts? Any recommendations?

Thanks!