Please be aware that Beijing has multiple airports and that these results are for all airports serving the city.
The best month to arrive at Beijing is February and the most expensive month to fly is August. (Average prices, based on 337 datapoints.)
The best day to arrive at Beijing is Saturday and it would be best to avoid Friday, as prices are on average 187.93% higher than on Saturday. (Average prices, based on 372 datapoints.)
The cheapest airline flying to Beijing is Hainan Airlines. They are 80% cheaper than KLM. (Average prices, based on 381 datapoints.)
At Beijing the most flights depart around 15:00. (Hourly flights, based on 490 datapoints.)
From Beijing it is on average the cheapest to fly to Harbin and to Seoul. (Average prices, based on 250 datapoints.)
From Beijing most of the flights depart to Hong Kong, second best connected from Beijing is Tokyo. (Daily flights, based on 75 datapoints.)