Source: Gary Leff - View from the Wing
Etihad Guest — a Citi and American Express transfer partner — offered absurdly cheap redemptions on Brussels Airlines. Sure, you had to hang up and call back to find an agent that could book the seats (Manchester, UK call center at 44 0345 6081225 is best for this) but given the low low prices it was worth it.
Redemptions were roundtrip only. Here are some of their cheap awards on Brussels Airlines, starting at just 930 miles roundtrip!