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 September. (Average prices, based on 634 datapoints.)
The best day to arrive at London is Tuesday and it would be best to avoid Saturday, as prices are on average 73.08% higher than on Tuesday. (Average prices, based on 735 datapoints.)
The cheapest airline flying to London is Jet2.com. They are 93% cheaper than British Airways. (Average prices, based on 775 datapoints.)
At London the most flights depart around 07:00. (Hourly flights, based on 1120 datapoints.)
From London it is on average the cheapest to fly to Madrid and to Amsterdam. (Average prices, based on 314 datapoints.)
From London most of the flights depart to Amsterdam, second best connected from London is New York. (Daily flights, based on 203 datapoints.)