Wirelessly posted (BlackBerry: BlackBerry8530/5.0.0.1030 Profile/MIDP-2.1 Configuration/CLDC-1.1 VendorID/417)
Check united.com for Saver award Business seats. The roundtrip will cost either 100K UA miles, or 90K Amex MR points transferred to ANA. (It's been reported on FT that ANA no longer assesses fuel surcharges on UA redemptions.)
If you can find low-level Business award seats on DL or its partners, you could also convert some Amex MR points to Delta miles to bring your Sky Miles total up to the amount needed for a roundtrip redemption.