Please be aware that Paris has multiple airports and that these results are for all airports serving the city.
The best month to arrive at Paris is May and the most expensive month to fly is January. (Average prices, based on 619 datapoints.)
The best day to arrive at Paris is Saturday and it would be best to avoid Thursday, as prices are on average 54% higher than on Saturday. (Average prices, based on 494 datapoints.)
The cheapest airline flying to Paris is British Airways. They are 91% cheaper than United Airlines. (Average prices, based on 737 datapoints.)
At Paris the most flights depart around 18:00. (Hourly flights, based on 1120 datapoints.)
From Paris it is on average the cheapest to fly to Frankfurt and to Rome. (Average prices, based on 189 datapoints.)
From Paris most of the flights depart to Nice, second best connected from Paris is Amsterdam. (Daily flights, based on 154 datapoints.)