I used Holiday Extras and paid £85 (after Cash Back) for 1 night at the Park Inn at Heathrow with 17 nights parking (car left at hotel - I kept the keys) we just caught the shuttle bus for the 5 minute journey to the terminal in the morning. Was great - we arrived the night before flying, no stress about delays had a fab meal at the local pub across the road and on our return it was a breeze to get the shuttle back to the hotel, collect our car and just drive home. I realise I was departing from a London airport but this deal was MUCH cheaper than any terminal parking and allowed a much more relaxed, stress-free start to out holiday. We did choose the mystery hotel - so did not know which hotel we had (other than it being 4 star) until we booked - but lets face it, Airport hotels are much of a muchness. Check out Holiday extras and be sure to go via Quidco if you have an account with them.