Please be aware that London has multiple airports and that these results are for all airports serving the city.
The best month to arrive at London is November and the most expensive month to fly is February. (Average prices, based on 653 datapoints.)
The best day to arrive at London is Tuesday and it would be best to avoid Thursday, as prices are on average 97.71% higher than on Tuesday. (Average prices, based on 511 datapoints.)
The cheapest airline flying to London is Ryanair. They are 73% cheaper than SAS Scandinavian Airlines. (Average prices, based on 887 datapoints.)
At London the most flights depart around 07:00. (Hourly flights, based on 1527 datapoints.)
From London it is on average the cheapest to fly to Copenhagen and to Amsterdam. (Average prices, based on 104 datapoints.)
From London most of the flights depart to Amsterdam, second best connected from London is Frankfurt. (Daily flights, based on 247 datapoints.)