Open jaw can be fun, but as stated above it can't be used for connecting flights and build in a good bit of flex. For example I did LHR-KUL, 2 days sightseeing, KUL-DPS for 8 days on the beach, DPS-SIN for 3 days of sightseeing then SIN-LHR. The first and last flights booked using the 241. Also have planned, LHR-BNA and ATL-LHR with a week in Florida in-between using Southwest for the internal flights and am working on LHR-ICN and HKG-LHR with 10 days in Vietnam in the middle, its 2 city breaks that sandwich some down time.