hi becca, have you tried
http://www.ryanair.com ? you didn't say what dates you were going so i put in 5th july - 19th july from stansted, and it was coming up at £155.58 (£77.79 each) including taxes but not luggage costs. that sounds pretty good to me. Basically you have to try all the airlines individually, or use a comparison site like
http://www.travelsupermarket.com. good luck with it.
have you booked the hesperia playas de mallorca yet? we stayed there 5 years ago, and it was a lovely clean hotel. the entertainment wasn't up too much, but we went out every evening and had a great time in santa ponsa. there are so many places to have a drink. We didn't go much on the food although there was always something we could find to eat. things could have changed in that time for the better though, so take what i say with a pinch of salt. the only thing that really got on my nerves there was the fact that if there are only two of you, you cannot sit at a table laid for 4 if there wasn't a two seater available and we were "told off" a couple of times and had to wait.
If you can't get booked in there, take a look at the hotel rey don jaime which is the next hotel up the side road, that looked like a nice hotel too.- dotty