Find a good deal on your flight from Paris to Kinshasa with Netflights. If you want to keep your options open, take a look at flights from another airport in Paris.
Both flight prices and accommodation rates fluctuate throughout the year, but searching by month will reveal the cheapest times to fly.
Or you could broaden your search by looking at flights to other airports in Zaire to see if there are any cheaper options.
Did you know you can also compare hotel and car hire prices in Zaire with Netflights? Take a look to get an idea of prices in Kinshasa.