Business class fares originating in Europe to the US are often cheaper than fares which originate in the U.S. I occasionally see $1000 roundtrip fares originating in Europe. Last year there was even a $400 one-way Europe-US fare on Star Alliance member TAP Air Portugal.
TAP is back with amazing fares across the Pond, originating in Europe. You can book them either one way (Europe to U.S.) or roundtrip (Europe – U.S. – Europe). In fact $651 or $656 one way fares are available most days from mid-November through summer.