Originally Posted by
SF1K
So if I want to use this for LHR-LAS-LHR but the booking dates for the return aren't open yet can I just choose a date that is available and then change it at a later time? I need LHR-LAS in January which is available and would want to use the return in June/July. Also could I change to LAX-LHR or SFO, just for flexibility of availability?
Yes. See the wiki for this thread for strategies and tips:
https://www.flyertalk.com/forum/brit...er-thread.html