Yes, yesterday I booked a flight, leaving Heathrow on Saturday, direct to Bangkok for �371, which is pretty reasonable. There are lots of last-minute deals around. Try www.cheap-flights.com for suggestions
Try www.cheapflights.co.uk, they have a wide range of fares. I personally found Expedia.com did not have the best deals. The cheapest airlines are usually Bangladesh Biman, Kuwait Airways, Egyptair and Turkish ( you can actually call Turkish Airlines direct and ask for 'promotions'). The most popular airlines for good prices are Emirates and Gulf Air.