Cheap flights from New York John F Kennedy Intl Airport to London from €251

The month of October is another great option to travel to London Heathrow Airport, with average flight prices from New York John F Kennedy Intl Airport averaging around €451.

The cheapest day to depart on your flight to London Heathrow Airport is on a Monday when prices can be found for as low as €438. This is often the case because there is less demand to fly during this day of the week. On the other hand, Sunday is the most expensive day to depart from New York John F Kennedy Intl Airport because it is more convenient for both business and leisure travellers. As a result, prices tend to be around €705.

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the morning. momondo users have found flights departing from New York John F Kennedy Intl Airport to London Heathrow Airport in the morning for as low as €474. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are €570 on average. Flights to London Heathrow Airport from New York John F Kennedy Intl Airport in the evening are generally more expensive because this time of day is more convenient for travellers’ schedules.

Fly from New York John F Kennedy Intl to London Heathrow for the best New York John F Kennedy Intl - London Heathrow flight prices

You are more likely to see cheaper flights to London Heathrow Airport from New York John F Kennedy Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around €528 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from New York John F Kennedy Intl Airport for as low as €511 on momondo.

Historically, on average around 14% of flights between New York and London have experienced a delay on any given week. The average delay length over the past 12 months has been 155 minutes.

Generally, flights departing in the early afternoon tend to experience fewer delays. Flights departing at night have, in the past, seen delays more frequently in comparison.

Tuesday is statistically the day of the week that experiences the fewest delays on this flight route. Thursday has historically seen more delays on average compared to the rest of the week.

According to our data, British Airways have had the fewest delays on this route over the last 12 months, with about 10% of their flights experiencing any sort of delay.

The number of flights available between New York John F Kennedy Intl Airport and London Heathrow Airport is 107 per day as of May 2026. The most frequent departure time is 18:00, with 83% of daily flights leaving in the evening.

As of May 2026, there are 751 flights per week flying from New York John F Kennedy Intl Airport to London Heathrow Airport. The most common day of the week flights depart is Thu, with 15% of flights taking off on this day.