I am a BA newbie except for the 100K Chase/BA miles and am trying to book LHR-DEL rt. BA's surcharges in economy (real economy not premium) added up to almost $500: For a little more I could get a revenue ticket on another carrier that costs no miles, in fact earns miles! So, even at 50% miles not a great deal. Next I would like to look into BA partners: AY, RJ, CX, etc. Can I do this online or do I have to call BA? (The booking page says we'd be offered partner flights only if BA are not available; how to get around that and book a partner anyway?) Finally, which partner would be best in terms of service and no/least surcharge?