The big 3 alliances tend to have close or matching carrier-imposed surcharges. Right now for US-EU flights, they are $970 each way for business, $425 - $450 each-way for PE, and $200 - $240 each-way for coach. With cheaper discount fares, it's not at all unusual for carrier surcharges to be signficantly more than base. Here's a current DL example for a JFK-AMS D1 fare with $750 base fare roundtrip and $1940 carrier-imposed surcharges ($970 each-way).