Wirelessly posted (BlackBerry: BlackBerry8530/5.0.0.1030 Profile/MIDP-2.1 Configuration/CLDC-1.1 VendorID/417)
"AmEx MR points can be transferred to DL miles, although this usually isn't a good value. KLM serves DPS from SIN. Other SkyTeam partners also fly to DPS."
All true, but the OP only wants a one-way redemption, and DL still charges the roundtrip redemption rate for one-way redemptions. That is not expected to change until 2015, and the OP is traveling this year.