Cheap flights from Houston to London from £371

In general, August is the cheapest month to fly from Houston to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £75. The month of September is another great option to travel to London Heathrow Airport, with average flight prices from Houston averaging around £299.

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 Houston to London Heathrow Airport in the afternoon for as low as £557. 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 £562 on average. Flights to London Heathrow Airport from Houston in the evening are generally more expensive because this time of day is more convenient for travellers’ schedules.

Fly from Houston George Bush Intcntl to London Heathrow for the best Houston - London Heathrow flight prices

You are more likely to see cheaper flights to London Heathrow Airport from Houston when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around £617 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 Houston for as low as £563 on momondo.

United Airlines, KLM, and Delta are the most popular carriers operating from Houston to London Heathrow

British Airways, United Airlines and Lufthansa are the top three most popular airlines that fly to London Heathrow Airport from Houston according to our data. British Airways is the first choice among our users, with 52% of people opting to fly with this airline when travelling to London Heathrow Airport. Keep in mind that there are 4 different airlines that fly to London Heathrow Airport on a routine basis, so you have a few additional options to choose from.

Historically, on average around 23% of flights between Houston and London have experienced a delay on any given week. The average delay length over the past 12 months has been 148 minutes.

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

Saturday is statistically the day of the week that experiences the fewest delays on this flight route. Friday 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 18% of their flights experiencing any sort of delay.

As of May 2026, there are 21 flights per day flying from Houston to London Heathrow Airport. The most common time of day flights depart is 20:00, with 61% of flights taking off in the evening.

149 flights are operational weekly from Houston to London Heathrow Airport as of May 2026. The most popular departure day for this route is Mon, with 15% of flights per week taking off on this day.