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 February and the most expensive month to fly is September. (Average prices, based on 390 datapoints.)
The best day to arrive at London is Tuesday and it would be best to avoid Sunday, as prices are on average 94.9% higher than on Tuesday. (Average prices, based on 2028 datapoints.)
The cheapest airline flying to London is Turkish Airlines. They are 90% cheaper than United Airlines. (Average prices, based on 517 datapoints.)
At London the most flights depart around 07:00. (Hourly flights, based on 1390 datapoints.)
From London it is on average the cheapest to fly to Paris and to Amsterdam. (Average prices, based on 248 datapoints.)
From London most of the flights depart to Amsterdam, second best connected from London is Dubai. (Daily flights, based on 379 datapoints.)