Please explain what USDM means. Is it a special air fare combination or a wholesaler? Thanks. JoyV
unfortunately it's a bit of a moot point now as USDM (us airways) is now merging with American Airlines (to be completed by 7 January).
for the last 4 or so years US Airways (member of star alliance) was selling miles to the general pubic with 100% bonuses... often with 8,9 or 10 of these a year (and you could buy each time).
there is a whole separate thread about this on the US airways forum here on AFF... but essentially you could buy return to Europe business class on star alliance partner airlines for around $2700 including the miles, all taxes and usd50 service fee (there were no fuel surcharges). (based on today's exchange rate of ~.93 to the Aussie dollar). first class was just a couple dollars more.
while some flexibility (maybe a couple days or so) was required in peak periods such as Christmas, for the rest of the year carriers such as Thai would have wide open availability for premium cabins (nothing even remotely like qantas and some other oneworld airlines with their almost impossible availability). for all intents and purposes you had an almost fully flexible bank of miles that could be redeemed even at short notice. (and in fact it was even better because in many cases you could put an award on hold and not even have to buy the miles until after you had confirmed flight availability).
with us airways now merging with American Airlines, you should expect premium cabin availability to be much more restricted, but there are still great deals... for now at least (an award chart devaluation is expected shortly). first class return to Europe on qantas for example can be had for just 160,000 miles. (and no fuel surcharges if flying QF). first class to Asia... 90,000.
an award chart devaluation similar to that recently introduced by united airlines is expected. this will significantly increase the price of awards... sometimes by as much as 100%... making the savings for business class potentially minimal, or indeed more expensive than buying equally good products outright for cash and having better flexibility. The Sri Lankan airlines deal ($1800 return for business class ex Asia, or Qatar airways for a similar price, or even Garuda or royal Brunei start to become attractive options again. for travel to the usa, carefully buying a combination of tickets can get you return business class on air pacific from australia for ~$3000. earning full miles. and often less than the price of premium economy on qf or virgin.
while most of us are ever grateful to Thai airways for having such great availability... recent pictures from on board catering suggest the product is going downhill a bit for business class. hence the comment that $2700 'is about all it's worth'. Catering looks pretty much economy and you're essentially paying for a bigger seat... with a steep angle (brand new 77W and a380 is good as long as you are not tall).
as the title of this tread is about best value based on price/value for money... I think with the exception of Garuda and royal Brunei, the best deals for leisure travel (and perhaps small business owners) are combination fares with your choice of carrier to asia (as close as Bali or Singapore, and with the option of business class fares to those cities) followed by a business class ticket ex Asia.
but each to their own