For those still looking at going and want to do it as cheap as possible (sense of adventure required!)...
Monday 2nd Nov, there is still a 30 quid Ryanair flight to Faro from Manchester. Note it arrives very late on the Monday, 23.30. Get the coach to Seville on the Tuesday, one way fares are around 20e.
Coming home there are a couple of options. You can fly back from Gibraltar to Luton for on the 4th for £48 or the 5th for £59. The best option might be flying back from Madrid to Manchester on the 4th for £47. It's a later flight (21.35) so ample time to hop on the train from Seville the day after the game.
Manchester - Faro; Mon 2nd £30
Faro - Seville coach; Tues 3rd 20e
Seville - Madrid train; Weds 4th, not sure on price but guessing £20/£25?
Madrid - Manchester; Weds 4th £47
Factor in hotels in Faro (cheap in my experience), and Seville (cheap from what I've seen and ultimately booked), so maybe another 60 quid based on a solo traveller, less if 2 sharing.
I make that about £170 ish all in, give or take, with the benefits of flying from and to Manchester.