Cheap flights from Houston to London from $187

The cheapest month to fly to London from Houston is in September. Flight prices, which tend to average around $630, are often lower during this time because this is during the off-season. The month of October is another great option to travel to London, with average flight prices from Houston averaging around $647.

Flying to London from Houston in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $920 when looking at flights departing in the afternoon. Flights to London are more costly in the evening, with an average ticket price of $960. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

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

You are more likely to see cheaper flights to London from Houston when booking weeks ahead of your departure date. In general, you can expect to find flights to London 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 from Houston for as low as $774 on momondo.

Air Canada, British Airways, and United Airlines are the most popular carriers operating from Houston to London

United Airlines, British Airways and Iberia are the top three most popular airlines that fly to London 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. Keep in mind that there are 11 different airlines that fly to London 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 140 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.

Tuesday 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 16% of their flights experiencing any sort of delay.

As of February 2026, there are 18 flights per day flying from Houston to London. The most common time of day flights depart is 4:00PM, with 57% of flights taking off in the afternoon.

As of February 2026, 126 flights take off from Houston and land in London each week. The most common flight departure day for this route is Thu, with 17% of weekly flights taking off on this day.