Please be aware that New York has multiple airports and that these results are for all airports serving the city.
The best month to fly between New York and Los Angeles is August and the most expensive month to fly is June. (Average prices, based on 510 datapoints.)
The best day to arrive at New York is Friday and it would be best to avoid Sunday, as prices are on average 116.17% higher than on Friday. (Average prices, based on 423 datapoints.)