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 August. (Average prices, based on 907 datapoints.)
The best day to arrive at London is Wednesday and it would be best to avoid Thursday, as prices are on average 54.08% higher than on Wednesday. (Average prices, based on 877 datapoints.)
The cheapest airline flying to London is British Airways. They are 65% cheaper than Qantas. (Average prices, based on 924 datapoints.)
At London the most flights depart around 10:00. (Hourly flights, based on 1049 datapoints.)
From London it is on average the cheapest to fly to Amsterdam and to Istanbul. (Average prices, based on 756 datapoints.)
From London most of the flights depart to Amsterdam, second best connected from London is Doha. (Daily flights, based on 79 datapoints.)