Thanks skywardhunter for such a detailed answer! I'm not sure an open-jaw would be so cheap, as its usually the return bookings that give the best deals. Also, in terms of trying for an open return, that may run into a similar problem with pricing based on the 1way price ... not sure. And not sure if booking would be possible since it would need to be by phone, and I'm in the "destination" as far as the booking goes, rather than the origin, so to speak. I suppose I could call the phone number of the foreign country, but I think that might lead to problems. As long as making a change to the return portion doesn't change the outbound flights at all (don't want to lose seat allocations or have to pay extra), then I'm comfortable with the idea (as comfortable as you can be having to pay for a flight when you are just short of getting it via another airline's FF awards!)