The month of November is, on average, the cheapest month to fly to London from United States, with most prices found around $192. If you’re not able to fly to London in November, then February is your next best option. Flight prices from United States to London during February average around $193.
According to our data, Saturday is the cheapest day to fly to London from United States. The lowest ticket price found for a Saturday departure recently was $283. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $457. These prices are subject to change though, so be sure to set up any prices alerts for flights to London.
Flying to London from United States in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $385 when looking at flights departing in the afternoon. Flights in the evening are often more expensive with an average ticket price of $483.