Cheap flights from Houston George Bush Intcntl Airport to London from $504

The month of October is, on average, the cheapest month to fly to London Heathrow Airport from Houston George Bush Intcntl Airport, with most prices found around $667. If you’re not able to fly to London Heathrow Airport in October, then February is your next best option. Flight prices from Houston George Bush Intcntl Airport to London Heathrow Airport during February average around $695.

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 George Bush Intcntl Airport to London Heathrow Airport in the afternoon for as low as $949. 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 $971.

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

You are more likely to see cheaper flights to London Heathrow Airport from Houston George Bush Intcntl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around $854 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 George Bush Intcntl Airport for as low as $748 on momondo.

There are 4 cabin classes available to choose from on Houston George Bush Intcntl Airport to London Heathrow Airport flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

As of May 2026, prices for Houston George Bush Intcntl Airport to London Heathrow Airport flights are approximately 5% cheaper when compared to flights at the same time last year.

JetBlue, United Airlines, and SWISS are the most popular carriers operating from Houston George Bush Intcntl to London Heathrow

United Airlines, British Airways and American Airlines are the top three most popular airlines that fly to London Heathrow Airport from Houston George Bush Intcntl Airport according to our data. United Airlines is the first choice among our users, with 45% of people opting to fly with this airline when traveling to London Heathrow Airport. Keep in mind that there are 12 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 in the evening have, in the past, seen delays more frequently in comparison.

Saturday 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 18% of their flights experiencing any sort of delay.

Toronto (YYZ) was the most common stop: 71% of momondo users choosing 1-stop flights on this route connected there.

Flights via Toronto (YYZ) offer the lowest average round-trip price of $953.

Flights connecting via Dallas (DFW) have the shortest average one-way travel time: 12h 32m.

Dallas (DFW) has the shortest average layover time for this route: 1h 44m.

As of May 2026, there are 21 flights per day flying from Houston George Bush Intcntl Airport to London Heathrow Airport. The most common time of day flights depart is 8:00PM, with 61% of flights taking off in the evening.

As of May 2026, there are 149 flights per week flying from Houston George Bush Intcntl Airport to London Heathrow Airport. The most common day of the week flights depart is Mon, with 15% of flights taking off on this day.