SQ237 now only runs Thu-Sun (effective 4 May) & SQ238 Fri-Mon. We had a J UA award on SQ237 on 14/5 re-scheduled to SQ218 on the 15th. I tried for SQ228 on the 14th (can see Saver availability on KVS with an SQ search), but UA agent couldn't see it. Leaves us with a 17.5 hr layover in SIN, but at least we now get the A380 instead of the 773.