As much of a railbuff as I am, and having considered taking the Eurostar between London and Paris, after reading various posts from the past here I am now considering flying from London (LHR) to Paris (CDG) with a return a few days later.
Other than using sites such as Expedia can anyone suggest airlines/websites which might offer the best deal? Travel dates will be in November and I MUST use these two airports. Suggestions/comments appreciated and thanks very much in advance.

Try Opodo.co.uk or Opodo.fr - they usually have the lowest price tix for the major airlines. You may well get a good deal with BA, for example.

Try www.easyjet.com.

They go from Luton to Paris for anywhere from 11.50GBP to 21.50GBP.

They don't fly out of LHR, but unless you have a specific reason for doing so, I'd consider this alternative.

Karen

Thanks very much for your help and responses.

I'd contact British Airways if I were you, they are striving to match the low cost fares these days. Depending on the time of day you leave it can be pretty cheap. They most certainly fly between LHR-CDG, I've done it many times.

BMI (British Midland) do low cost flights from Heathrow to Charles de Gaulle and we have found them very efficient. Their website is http://www.flybmi.com/bmi/en-gb/sectionhome.aspx?p=201

Thanks again everyone...I ended up with British Airways tickets for $53 per person RT...of course, the TAXES came to more than $100 but I think all-in-all this will work out for the best..sad not be able to do the chunnel thing but much less hassle this way.
Best wishes to you.