Depends what you're after, some prefer to see Barcelona or even stay in Callela. The Easiest way is to fly Manc to Perpignan and get a hotel in the centre but the prices will be riddiculous now at over £300 just for the return flight!!
Other options are easy jet, BMI etc to Gerona and hire a car or get Catalans Sports Tours to pick you up.
Alternatively, Ryan Air - Standsted to Perpignan is 70quid return at the min. 9 (Thurs to Mon)
Try skyscanner.net for flights.