There are zero airlines offering flights to Paris. The most direct route isn’t necessarily the cheapest – being flexible is key to finding the lowest airfare rates. For example, try searching by month to see the best time of the week to fly.
Paris Charles De Gaulle Airport is just one of the airports in Paris. If you're not set on a specific airport, try changing your search from Paris Charles De Gaulle Airport to Paris to see a broader range of flights – they might be cheaper.
If you're planning on going to Paris during this time, you could take a look at other airport options. Or you could try to get a last-minute bargain.