Ok so been trying to book flights from GLA to DEN for a bit now, trying to get something booked before end of may so the points don't all get moved over to BA as they need a lot more points. I have been checking awardtravelr and it is showing avaliability on US Airways flight US769 GLA - PHL on 29 August however when I call BMI they say there is no avaliability. Also on the same day they are showing US715 PHY - DEN avaliable in Business, is this correct as I thought they only did First on domestic routes?

Any Ideas?