Cheap flights from New Hampshire to London from $259

The cheapest month to fly to London from New Hampshire is in June. Flight prices, which tend to average around $0, are often lower during this time because this is during the off-season. The month of May is another great option to travel to London, with average flight prices from New Hampshire averaging around $0.

The cheapest day to depart from New Hampshire to London is on a Sunday. Travelers who choose to depart for London on a Sunday will often find tickets for as low as $741. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $774. These prices are subject to change though, so be sure to set up a Price Alert for flights to London.

Flying to London from New Hampshire in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $654 when looking at flights departing in the afternoon. Flights to London are more costly in the evening, with an average ticket price of $764. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

You are more likely to see cheaper flights to London from New Hampshire when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around $704 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from New Hampshire for as low as $651 on momondo.

As of August 2026, there are 258 flights per week flying from New Hampshire to London. The most common day of the week flights depart is Fri, with 18% of flights taking off on this day.

If you’re flying from a popular airport in New Hampshire, such as Manchester or Lebanon, and flying into London, then you can expect flight times to average 9h 59m and 10h 25m, respectively.