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$257+ Cheap flights from George Bush Intcntl (IAH) to Heathrow (LHR)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/19. Fares are subject to change and may not be available on all flights or dates of travel.
IAH — LHR
Sep 10 — Sep 171
Wed 9/10
Wed 9/17
1 adult, Economy
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Cheapflights Tip: The best prices from Houston George Bush Intcntl to London Heathrow are usually found in October or September, booked 89 days in advance, depart on a Wednesday or Tuesday and return on a Sunday

Cheap flight deals from George Bush Intcntl to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from George Bush Intcntl (IAH) to Heathrow (LHR). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 5, 2025.

Round-trip from

$517
(United Airlines)

One-way from

$257
(Kiwi.com)

Popular in

June

Cheapest in

October

Average price

$676

Good round-trip deal

$619 or less

Good one-way deal

$439 or less
From Houston George Bush Intcntl to London Heathrow
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One-way flight from Houston George Bush Intcntl to London Heathrow
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Highest demand for flights based on searches. 21% potential increase in price ($226 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($39 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Houston George Bush Intcntl to London Heathrow.
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Price to beat on a one-way flight from Houston George Bush Intcntl to London Heathrow.
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Find flight deals from George Bush Intcntl to Heathrow

Cheapest flights from George Bush Intcntl to Heathrow
Explore the most affordable flight options available from George Bush Intcntl to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 5, 2025.

This United Airlines deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/97:50 pmIAH - LHR
1 stop29h 05mUnited Airlines
Tue 9/162:10 pmLHR - IAH
1 stop31h 32mUnited Airlines
Deal found 9/2$517
This KLM deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/211:13 pmIAH - LHR
1 stop11h 32mMultiple Airlines
Tue 10/76:15 amLHR - IAH
1 stop13h 20mMultiple Airlines
Deal found 9/2$518
This United Airlines deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/14:20 pmIAH - LHR
Nonstop9h 20mUnited Airlines
Tue 10/710:50 amLHR - IAH
1 stop35h 45mUnited Airlines
Deal found 9/3$519
This Delta deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/112:39 pmIAH - LHR
1 stop15h 21mDelta
Fri 10/106:15 amLHR - IAH
1 stop13h 20mDelta
Deal found 9/4$520
This Delta deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/13:16 pmIAH - LHR
1 stop11h 39mDelta
Tue 10/146:15 amLHR - IAH
1 stop13h 20mDelta
Deal found 9/2$521
This United deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/144:20 pmIAH - LHR
Nonstop9h 20mMultiple Airlines
Tue 9/309:30 amLHR - IAH
1 stop16h 12mMultiple Airlines
Deal found 9/3$522
This United Airlines deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/144:20 pmIAH - LHR
Nonstop9h 20mUnited Airlines
Tue 9/3010:00 amLHR - IAH
Nonstop10h 15mUnited Airlines
Deal found 9/4$523
This United Airlines deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/14:20 pmIAH - LHR
Nonstop9h 20mUnited Airlines
Thu 10/910:00 amLHR - IAH
Nonstop10h 15mUnited Airlines
Deal found 9/2$524
This Gurufare deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/292:27 pmIAH - LHR
1 stop16h 18mFinnair
Fri 10/109:25 amLHR - IAH
Nonstop10h 20mFinnair
Deal found 9/2$525
This FlightHub deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/294:00 pmIAH - LHR
1 stop12h 20mBritish Airways
Fri 10/109:25 amLHR - IAH
Nonstop10h 20mBritish Airways
Deal found 9/3$526
This Mytrip deal was found by Cheapflights users on 9/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/297:20 amIAH - LHR
1 stop22h 30mAir Canada
Thu 10/96:50 amLHR - IAH
2 stops21h 24mAir Canada
Deal found 9/3$527
This Air Canada deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/239:56 amIAH - LHR
2 stops14h 34mMultiple Airlines
Tue 9/309:30 amLHR - IAH
1 stop16h 12mMultiple Airlines
Deal found 9/2$528

Cheapflights Fare Finder

 
Customize your flight search to find flights from George Bush Intcntl to Heathrow that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 5, 2025.
Use the filters below to find and compare flights from Houston George Bush Intcntl Airport to London Heathrow Airport that are best for you.

Fly from

George Bush Intcntl

Fly to

Heathrow

Route

Depart

Return

Price

HoustonLondon

IAH - LHR

IAHLHR

Houston George Bush Intcntl

Sat 10/25

4:54 pm-7:40 am

1 stop32h 46m

London Heathrow

Tue 11/4

2:30 pm-4:24 pm

1 stop31h 54m

$517

HoustonLondon

IAH - LHR

IAHLHR

Houston George Bush Intcntl

Mon 9/22

1:13 pm-6:45 am

1 stop11h 32m

London Heathrow

Wed 10/1

6:15 am-1:35 pm

1 stop13h 20m

$520

HoustonLondon

IAH - LHR

IAHLHR

Houston George Bush Intcntl

Wed 9/10

2:45 pm-11:25 am

1 stop14h 40m

London Heathrow

Thu 10/2

6:15 am-1:35 pm

1 stop13h 20m

$521

HoustonLondon

IAH - LHR

IAHLHR

Houston George Bush Intcntl

Wed 10/8

11:49 am-7:15 am

1 stop13h 26m

London Heathrow

Tue 10/14

6:15 am-1:35 pm

1 stop13h 20m

$521

HoustonLondon

IAH - LHR

IAHLHR

Houston George Bush Intcntl

Sun 9/28

5:45 pm-1:10 pm

1 stop13h 25m

London Heathrow

Tue 10/7

6:15 am-1:35 pm

1 stop13h 20m

$521

HoustonLondon

IAH - LHR

IAHLHR

Houston George Bush Intcntl

Wed 11/19

3:09 pm-8:45 am

1 stop11h 36m

London Heathrow

Thu 11/27

6:20 am-1:55 pm

1 stop13h 35m

$521

HoustonLondon

IAH - LHR

IAHLHR

Houston George Bush Intcntl

Tue 10/21

12:37 pm-9:15 am

1 stop14h 38m

London Heathrow

Mon 10/27

8:25 pm-2:30 pm

1 stop23h 05m

$521

HoustonLondon

IAH - LHR

IAHLHR

Houston George Bush Intcntl

Mon 12/1

7:40 am-10:00 am

1 stop20h 20m

London Heathrow

Tue 12/16

6:20 am-1:55 pm

1 stop13h 35m

$521

HoustonLondon

IAH - LHR

IAHLHR

Houston George Bush Intcntl

Tue 9/30

1:13 pm-6:45 am

1 stop11h 32m

London Heathrow

Thu 10/9

6:15 am-1:35 pm

1 stop13h 20m

$521

HoustonLondon

IAH - LHR

IAHLHR

Houston George Bush Intcntl

Wed 10/8

12:37 pm-9:15 am

1 stop14h 38m

London Heathrow

Wed 10/22

6:15 am-1:35 pm

1 stop13h 20m

$521

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/3

Showing 1-10 of 21 results
1
2
3

The best insider tips for Houston George Bush Intcntl Airport to London Heathrow Airport flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Houston George Bush Intcntl Airport to London Heathrow Airport trip
Airports
IAH

Check the security checkpoint wait times on the IAH website to save time before your flight.

Read more about IAHby Evie Carrick
LHR

Take the Heathrow Express for the fastest route to central London, arriving at Paddington Station.

Read more about LHRby Ramsey Qubein
Our travel experts
Evie Carrick

Evie Carrick

Expert on IAH

Evie Carrick

Evie Carrick

Evie Carrick is a writer and editor who has lived in five countries and traveled to over 50, with extensive experience flying around the world. She was born in Colorado, but has spent time flying to both coasts to visit family. She writes regularly for Travel + Leisure, BuzzFeed, and SKI and recently published seven travel journals with Simon & Schuster.

Read more
Ramsey Qubein

Ramsey Qubein

Expert on LHR

Ramsey Qubein

Ramsey Qubein

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Read more

Best time to book a flight from George Bush Intcntl to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from George Bush Intcntl with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Houston George Bush Intcntl Airport to London Heathrow Airport

How far ahead should I book a flight from Houston George Bush Intcntl Airport to London Heathrow Airport?

Use this chart to determine the optimal time to book a round-trip flight from George Bush Intcntl to Heathrow. Price data was last updated on August 29, 2025.

The best time to book flights from Houston George Bush Intcntl Airport to London Heathrow Airport is 89 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Houston George Bush Intcntl Airport to London Heathrow Airport?

Currently, November is the cheapest month in which you can book a flight from Houston George Bush Intcntl Airport to London Heathrow Airport (average of $661). Flying from Houston George Bush Intcntl Airport to London Heathrow Airport in June is currently the most expensive (average of $1,097). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from IAH to LHR?

Find hourly flight availability from George Bush Intcntl to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 5, 2025.

Unlike in the evening, when flights are generally more expensive, you can save up to 12% on flights from Houston George Bush Intcntl Airport to London Heathrow Airport by exploring options for tickets at noon.

What is the cheapest day to fly from Houston George Bush Intcntl Airport to London Heathrow Airport?

Use this chart to determine the cheapest time to fly round-trip from George Bush Intcntl to Heathrow. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Houston George Bush Intcntl Airport to London Heathrow Airport flight should consider departing on Saturday at noon when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

How much does it cost to fly round-trip from Houston George Bush Intcntl Airport to London Heathrow Airport?

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Heathrow. Reviews last updated September 5, 2025.
Get a feel of what it's like to fly with United Airlines, American Airlines, and Iberia from Houston George Bush Intcntl Airport to London Heathrow Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,937 reviews

Boarding

7.7

Comfort

7.3

Food

6.6

Crew

8.1

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,937 reviews
United Airlines
7.4
Good
8,937 reviews

Boarding

7.7

Comfort

7.3

Food

6.6

Crew

8.1

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
American Airlines
7.2
Good
10,000 reviews
United Airlines
7.4
Good
8,937 reviews

Boarding

7.7

Comfort

7.3

Food

6.6

Crew

8.1

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Iberia
7.0
Good
2,909 reviews
United Airlines
7.4
Good
8,937 reviews

Boarding

7.7

Comfort

7.3

Food

6.6

Crew

8.1

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Lufthansa
6.8
Okay
7,390 reviews
United Airlines
7.4
Good
8,937 reviews

Boarding

7.7

Comfort

7.3

Food

6.6

Crew

8.1

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
British Airways
6.7
Okay
7,345 reviews
United Airlines
7.4
Good
8,937 reviews

Boarding

7.7

Comfort

7.3

Food

6.6

Crew

8.1

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Related info for your journey

Find useful and relevant information for your journey from George Bush Intcntl to Heathrow. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Houston George Bush Intcntl Airport to London Heathrow Airport?

    United Airlines and Delta can get you from Houston George Bush Intcntl Airport to London Heathrow Airport in just under 14h 40m. Your travel time can differ by up to 18h 06m. Houston George Bush Intcntl Airport and London Heathrow Airport are separated by a distance of 4820 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Houston George Bush Intcntl Airport to London Heathrow Airport round-trip?

    Currently priced at $101, JetBlue will fly you from Houston George Bush Intcntl Airport to London Heathrow Airport and back. In addition to JetBlue, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from American Airlines and Finnair - these airlines can fly you to your destination from $572 and $573, respectively. These flights start at 87% lower than the current average price 3 months from now.

  • What are the most reliable airlines from Houston George Bush Intcntl Airport to London Heathrow Airport?

    Before booking your flight to London Heathrow Airport from Houston George Bush Intcntl Airport, check out the most reliable airlines to get you to your destination on time: American Airlines (79%), Aer Lingus (79%), Finnair( 79%).

  • What are the cheapest flights from Houston George Bush Intcntl Airport to London Heathrow Airport?

    On average you can expect to pay $2,777 for a flight from Houston George Bush Intcntl Airport to London Heathrow Airport. The cheapest flight overall is $393 while the most popular route, (Houston George Bush Intcntl - London Heathrow) is currently priced at $488.

  • Can I find deals for flights from George Bush Intcntl to Heathrow that include hotel bookings?

    Yes. In addition to deals on George Bush Intcntl to Heathrow flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from George Bush Intcntl to Heathrow?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from George Bush Intcntl to Heathrow.

  • Can I find deals for business class flights from George Bush Intcntl to Heathrow?

    Yes. Cheapflights offers flight deals from George Bush Intcntl to Heathrow by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Houston George Bush Intcntl Airport to London Heathrow Airport?

    Currently, November is the cheapest month in which you can book a flight from Houston George Bush Intcntl Airport to London Heathrow Airport (average of $661). Flying from Houston George Bush Intcntl Airport to London Heathrow Airport in June is currently the most expensive (average of $1,097). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Hounslow
Hayes
Thornton Heath
Southend-on-Sea
Harrow
Canterbury
Croydon
Eastleigh
Dartford
Dover
Winchester
Stratford-upon-Avon
Orpington
Northampton
Gatwick
Borehamwood
Broadway
Aylesbury
Chelmsford
Bedford

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 10 airlines flying from George Bush Intcntl to Heathrow

Discover the top 10 airlines that operate flights from George Bush Intcntl to Heathrow. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 5, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$101Average$569FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$572Average$839FlexibilityNo cancel feeOn-time71%
FinnairCheapest$573Average$739FlexibilityNo cancel feeOn-time76%
IberiaCheapest$578Average$756FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$578Average$889FlexibilityNo cancel feeOn-time70%
Virgin AtlanticCheapest$582Average$783FlexibilityNo cancel feeOn-time72%
United AirlinesCheapest$591Average$897FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$612Average$867FlexibilityNo cancel feeOn-time76%
DeltaCheapest$631Average$895FlexibilityNo cancel feeOn-timeN/A
Austrian AirlinesCheapest$644Average$1,343FlexibilityNo cancel feeOn-time78%

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