Originally Posted by
corporate-wage-slave
Welcome to Flyertalk and welcome to the BA forum.
The usual reason behind this is the Saturday Night Rule. We would have to delve into the details of the fare rules to be sure, but leisure tickets often have this rule to make it harder for business travellers to take advantages of those fares. If my theory is correct then there is no way around it, you would have to leave CPH on a Sunday. Sometimes the fare rule imputes it on to the trans Atlantic sectors, which if so would allow you to go as far as London, but again it would depend on the fare details. There are over 10,000 fare combinations over the Atlantic so this is an area where attention to detail gets important. If that second course of action is possible then usually the requirement would continue to require no more than 24 hours in London, but it sounds like that is OK anyway. You can ring YouFirst to find out whether any of this is viable, assuming you bought the tickets via BA rather than AA.
Thank you! I didn't want to give them a call until I knew what the "rule" was first in case they gave me an answer I didn't like (hence this post). But, it sounds like it's either a no-go (Saturday Night Rule) or a maybe, but time in London has to be less than 24 hours (24-hour rule), and there's not a way to know that without delving into the details of my specific fare (which is way too complicated for me, lol). Thanks!