June 28, 2010 - 11:27 AM ET

American Express Business Travel clients in the first quarter paid an average of $146 per night for a U.S. hotel room, down 5 percent year over year . The April average was $150. For first-quarter hotel bookings outside the United States, clients on average paid $228 per night, down less than one percent year over year, according to Amex. The average non-U.S. rate declined further in April, to $224.