Pricing on this route swings widely depending on season and how far out you book. January, February, and March are the strongest value months, when European leisure demand is low and corporate travel hasn't ramped back up, often putting fares at the lower end of that $2,400-$6,050 range. October and November are similarly favorable, sitting after peak summer and before the December holiday surge. Booking 3-4 months ahead generally gets you the best mix of price and seat selection, though consolidator inventory on these four carriers can open up good fares even inside 6-8 weeks if you're flexible on connection city. Avoid summer and the December-January holiday window unless you're booking far in advance, as premium cabin award and discount inventory dries up fast.