I have friends who just returned from a package tour of London and its environs. They paid $1,000 each which included airfare, transfers, hotel, full breakfast, tickets to various exhibits and places including a show. They stayed for a week. Their only additional expense was for food outside of breakfast (and whatever trinkets they picked up). They got it through Northwest Airlines. Back in the nineties I and a friend went to France (the Riviera and Paris) for two weeks on an all-inclusive package tour through American Airlines for less than a thousand bucks.....and it even included a rental car for the Riviera! (I did all the driving because it was a stick, plus the car was about the size of a kitchen chair, but it was a great addition, plus it got like ten-million-miles to the gallon.) You can get really good deals for Europe.
Gerard