Cheap flights from London Heathrow Airport to Houston from £342

In general, January is the cheapest month to fly from London Heathrow Airport to Houston. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £64. If you are unable to visit Houston during the month of January, then departing from London Heathrow Airport during the month March is also very affordable. Most momondo users find prices during this month for around £80.

The cheapest time of day to fly to Houston is in the afternoon when flights can be purchased for as low as £692. In contrast, the most expensive time of day to depart to Houston is in the morning when prices are around £735.

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

You are more likely to see cheaper flights to Houston from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Houston for around £747 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Houston from London Heathrow Airport for as low as £656 on momondo.

JetBlue, TAP AIR PORTUGAL, and Delta are the most popular carriers operating from London Heathrow to Houston

British Airways, Lufthansa and United Airlines are the top three most popular airlines that fly to Houston from London Heathrow Airport according to our data. British Airways is the first choice among our users, with 54% of people opting to fly with this airline when travelling to Houston. Keep in mind that there are 16 different airlines that fly to Houston on a routine basis, so you have a few additional options to choose from.

Historically, on average around 14% of flights between London and Houston have experienced a delay on any given week. The average delay length over the past 12 months has been 154 minutes.

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

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

According to our data, United Airlines have had the fewest delays on this route over the last 12 months, with about 11% of their flights experiencing any sort of delay.

The number of flights available between London Heathrow Airport and Houston is 18 per day as of April 2026. The most frequent departure time is 10:00, with 53% of daily flights leaving at midday.

As of April 2026, 128 flights take off from London Heathrow Airport and land in Houston each week. The most common flight departure day for this route is Mon, with 17% of weekly flights taking off on this day.