Cheap flights from Houston to London from $301

The month of October is, on average, the cheapest month to fly to London Heathrow Airport from Houston, with most prices found around $669. If you’re not able to fly to London Heathrow Airport in October, then September is your next best option. Flight prices from Houston to London Heathrow Airport during September average around $670.

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 $916. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the evening are often more expensive with an average ticket price of $963.

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 $803 when searching weeks out. 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 $774 on momondo.

KLM, Delta, and Virgin Atlantic are the most popular carriers operating from Houston to London Heathrow

United Airlines, British Airways and Iberia are the top three most popular airlines that fly to London Heathrow Airport from Houston according to our data. United Airlines is the first choice among our users, with 42% of people opting to fly with this airline when traveling to London Heathrow Airport. Keep in mind that there are 11 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 141 minutes.

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

Thursday is statistically the day of the week which experiences the fewest number of 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 least number of delays on this route over the last 12 months; with about 17% of their flights experiencing any sort of delay.

As of February 2026, there are 17 flights per day flying from Houston to London Heathrow Airport. The most common time of day flights depart is 4:00PM, with 61% of flights taking off in the afternoon.

The number of flights available between Houston and London Heathrow Airport is 119 per week as of February 2026. The most frequent departure day is Mon, with 14% of weekly flights leaving on this day.