$369 Cheap Flights from Houston (IAH) to London (LHR)

View $369 flight on Thu, Mar 12, 2026Opens in a new window

Popular airlines from George Bush Intercontinental Airport (IAH) to Heathrow Airport (LHR)

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Find available prices by choosing your travel dates.

Cheap Flights from Houston to London (IAH-LHR)

Prices were available within the past 7 days and start at $369 for one-way flights and $561 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

British Airways
Mon, Mar 2 - Wed, Mar 11
IAH
Houston
LHR
London
$561 Roundtrip, found 1 hour ago
$561
Roundtrip
found 1 hour ago
Select British Airways flight, departing Mon, Mar 2 from Houston to London, returning Wed, Mar 11, priced at $561 found 1 hour ago
Iberia
Mon, Mar 2 - Wed, Mar 11
IAH
Houston
LHR
London
$561 Roundtrip, found 1 hour ago
$561
Roundtrip
found 1 hour ago
Select Iberia flight, departing Mon, Mar 2 from Houston to London, returning Wed, Mar 11, priced at $561 found 1 hour ago
Iberia
Mon, Mar 2 - Wed, Mar 11
IAH
Houston
LHR
London
$566 Roundtrip, found 1 hour ago
$566
Roundtrip
found 1 hour ago
Select Iberia flight, departing Mon, Mar 2 from Houston to London, returning Wed, Mar 11, priced at $566 found 1 hour ago
Air Canada
Mon, Mar 2 - Wed, Mar 11
IAH
Houston
LHR
London
$567 Roundtrip, found 1 hour ago
$567
Roundtrip
found 1 hour ago
Select Air Canada flight, departing Mon, Mar 2 from Houston to London, returning Wed, Mar 11, priced at $567 found 1 hour ago
Iberia
Mon, Mar 2 - Wed, Mar 11
IAH
Houston
LHR
London
$572 Roundtrip, found 1 hour ago
$572
Roundtrip
found 1 hour ago
Select Iberia flight, departing Mon, Mar 2 from Houston to London, returning Wed, Mar 11, priced at $572 found 1 hour ago
Air Canada
Mon, Mar 2 - Wed, Mar 11
IAH
Houston
LHR
London
$575 Roundtrip, found 1 hour ago
$575
Roundtrip
found 1 hour ago
Select Air Canada flight, departing Mon, Mar 2 from Houston to London, returning Wed, Mar 11, priced at $575 found 1 hour ago
Lufthansa
Mon, Mar 2 - Wed, Mar 11
IAH
Houston
LHR
London
$587 Roundtrip, found 1 hour ago
$587
Roundtrip
found 1 hour ago
Select Lufthansa flight, departing Mon, Mar 2 from Houston to London, returning Wed, Mar 11, priced at $587 found 1 hour ago
United
Sun, Oct 12 - Fri, Oct 17
IAH
Houston
LHR
London
$589 Roundtrip, found 5 hours ago
$589
Roundtrip
found 5 hours ago
Select United flight, departing Sun, Oct 12 from Houston to London, returning Fri, Oct 17, priced at $589 found 5 hours ago
Virgin Atlantic
Fri, Oct 10 - Tue, Oct 14
IAH
Houston
LHR
London
$602 Roundtrip, found 1 day ago
$602
Roundtrip
found 1 day ago
Select Virgin Atlantic flight, departing Fri, Oct 10 from Houston to London, returning Tue, Oct 14, priced at $602 found 1 day ago
Delta
Fri, Oct 10 - Tue, Oct 14
IAH
Houston
LHR
London
$602 Roundtrip, found 1 day ago
$602
Roundtrip
found 1 day ago
Select Delta flight, departing Fri, Oct 10 from Houston to London, returning Tue, Oct 14, priced at $602 found 1 day ago
Flights from Houston (IAH) to London (LHR)
Origin airport
George Bush Intercontinental
Destination airport
Heathrow
Airlines serving
Aer Lingus, Air Canada, Air France, American Airlines, Austrian Airlines, British Airways, Brussels Airlines, Delta, Finnair, Iberia, JetBlue Airways, KLM, Lufthansa, Turkish Airlines, United, Virgin Atlantic, WestJet
Roundtrip price
$561
Distance
4823 mi

Houston to London Flights

The cheapest times to fly from Houston to London

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Houston to London are during the month of March. You can find some of the cheapest flights from Houston to London with Expedia's search tool and vast selection of airlines.

The best time to book a flight from Houston to London

Sunday is one of the best days to book for cheap flights from Houston to London: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

How to find cheap round-trip tickets from Houston to London

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Houston to London in 2025. You can also book with separate airlines for your outbound and return journeys, from $369 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Houston to London flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

You could also save big by booking one of Expedia's vacation packages. Bundling together your Houston to London airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

*Terms apply.

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

Frequently asked questions

How much does a flight from George Bush Intercontinental Airport (IAH) to Heathrow Airport (LHR) cost?
Cheap round-trip flights from George Bush Intercontinental Airport (IAH) to Heathrow Airport (LHR) start from $680. This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a British Airways flight leaving IAH on May 6 2025 and touching down at LHR. The price was last updated on April 24 2025 and has not changed since.
What is the cheapest month to fly from IAH to LHR?
The cheapest flights from IAH to LHR are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from George Bush Intercontinental Airport (IAH) to Heathrow Airport (LHR)?
Catch a nonstop flight with United Airlines and head straight from George Bush Intercontinental Airport (IAH) to Heathrow Airport (LHR).
What is the cheapest airline that flies from IAH to LHR?
Fly from IAH to LHR with American Airlines. This airline currently offers the cheapest one-way fare on this route, starting from $413. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from IAH on July 20 2025. Prices were last updated on April 24 2025 and have not changed since.
How many flights per day from George Bush Intercontinental Airport (IAH) to Heathrow Airport (LHR)?
When jetting out of George Bush Intercontinental Airport (IAH), you’ll have a choice from an average of 3 daily nonstop flights to Heathrow Airport (LHR).
What are the most popular departure times for flights from George Bush Intercontinental Airport (IAH) to Heathrow Airport (LHR)?
The 4 PM departures from IAH to LHR see the highest demand. They can also be more expensive. If you’re hoping to save money, book during off-peak hours.
What day of the week has the most flights from IAH to LHR?
Travel on a Thursday if you’re searching for the best choice of flights from George Bush Intercontinental Airport (IAH) to Heathrow Airport (LHR).
What is the earliest flight from George Bush Intercontinental Airport (IAH) to Heathrow Airport (LHR)?
The first flight of the day jetting off from George Bush Intercontinental Airport (IAH) is at around 3:55PM UTC-6. Hop on this flight and you’ll reach Heathrow Airport (LHR) at approximately 6:55AM UTC+0. The total flight duration is 9h.
How long does it take to fly from George Bush Intercontinental Airport (IAH) to Heathrow Airport (LHR)?
It takes roughly 9 hours and 2 minutes to travel the 4,800 mi from IAH to LHR.
What is the best time to fly from George Bush Intercontinental Airport (IAH) to Heathrow Airport (LHR)?
To touch down at Heathrow Airport (LHR) without delays, opt for a flight that leaves George Bush Intercontinental Airport (IAH) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.
What airports do you fly into for London from George Bush Intercontinental Airport (IAH)?
Heathrow Airport (LHR) is the only airport in London with direct flights from George Bush Intercontinental Airport (IAH). Consider the options and discover cheap fares on Expedia.
Is it cheaper to buy a plane ticket from George Bush Intercontinental Airport (IAH) to Heathrow Airport (LHR) last-minute?
Booking your flight from IAH to LHR shortly before your journey is typically more expensive. However, if there’s some wiggle room with your itinerary, you could grab a cheap last-minute fare.
Is it cheaper to book an IAH to LHR flight and hotel package?
Compared with arranging flights and hotels separately, booking an IAH to LHR flight and hotel package with Expedia could lead to significant savings. Better still, having everything in one easy place will take the hassle out of planning your trip. Simply pick your flights and choose from our extensive range of hotels, then customize your trip with extras like tours, activities and car rentals.
Can I cancel or change the date of my flight from George Bush Intercontinental Airport (IAH) to Heathrow Airport (LHR)?
If you reserved your IAH to LHR flight within the last 24 hours, you may be able to cancel or modify it without fees. Depending on the airline and the ticket type you purchased, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal if you’d like more information.

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*Available to One Key members.