Please be aware that London has multiple airports and that these results are for all airports serving the city.
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 Air Europa. They are 67% cheaper than Pegasus Airlines. (Average prices, based on 378 datapoints.)
At London the most flights depart around 17:00. (Hourly flights, based on 1112 datapoints.)
From London it is on average the cheapest to fly to Amsterdam and to Istanbul. (Average prices, based on 222 datapoints.)
From London most of the flights depart to Amsterdam, second best connected from London is Frankfurt. (Daily flights, based on 281 datapoints.)