Cheap flights from New Hampshire to London from £187

In general, October is the cheapest month to fly from New Hampshire to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £395. The month of January is another great option to travel to London Heathrow Airport, with average flight prices from New Hampshire averaging around £398.

On average, the least expensive day to fly to London Heathrow Airport from New Hampshire is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as £431. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Saturday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Saturday is £539.

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the afternoon. momondo users have found flights departing from New Hampshire to London Heathrow Airport in the afternoon for as low as £444. 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 morning when prices are £535 on average. Flights to London Heathrow Airport from New Hampshire in the morning are generally more expensive because this time of day is more convenient for travellers’ schedules.

You are more likely to see cheaper flights to London Heathrow Airport from New Hampshire when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around £469 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 Hampshire for as low as £448 on momondo.

As of April 2026, 225 flights take off from New Hampshire and land in London Heathrow Airport each week. The most common flight departure day for this route is Mon, with 16% of weekly flights taking off on this day.

If you’re flying from a popular airport in New Hampshire, such as Lebanon or Manchester, and flying into London Heathrow Airport, then you can expect flight times to average 9h 30m and 10h 03m, respectively.