Please be aware that New York and London has multiple airports and that these results are for all airports serving the city.
The best month to fly between New York and London is February and the most expensive month to fly is March. (Average prices, based on 233 datapoints.)
The best day to arrive at New York is Wednesday and it would be best to avoid Friday, as prices are on average 194.33% higher than on Wednesday. (Average prices, based on 213 datapoints.)
The cheapest airline flying from New York to London is Virgin Atlantic. They are 23% cheaper than United Airlines. (Average prices, based on 250 datapoints.)
The best time to fly is at around 23. (Average prices, based on 330 datapoints.)