Netflights is free and simple to use. Having them all in one place makes it easy to compare prices and find the best deal for you.
There are actually zero airports in Paris.
The cheapest airport to fly from is Dallas/Fort Worth International Airport, but we recommend booking in advance to get a good price.
If you're landing late, why not take a look at hotels near the airport? We've got a range of accommodation and car hire options across France.