Why stay at the airport when you have all of Paris to explore?

The BA website suggests hotels - you could perhaps have scored a nice deal had you booked a hotel as part of your flights. But you can still book a hotel from BA now.

If money is a restriction, then shop around - use a website like www.trivago.com to find the best deals. And always check the reviews on www.tripadvisor.com before buying - though do bear in mind that some of the poor reviews may be a little over-the-top.