The UA award availability was screwed up for a while after the migration and might still be having some problems. Yesterday morning it wouldn't even show the monthly calendars for flexible dates, but by last night it was finding some routings but I wasn't trying CDG or open jaw awards. You might want to check it over the next couple of days. If you can find outbound routing that fits your needs US res should be able to hold it for 3 days.
Jim