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$289+ Cheap flights from George Bush Intcntl (IAH) to London (LON)

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 12/3. Fares are subject to change and may not be available on all flights or dates of travel.
IAH — LON
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
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Cheapflights Tip: The best prices from Houston George Bush Intcntl to London are usually found in October or February, booked 33 days in advance, depart on a Wednesday or Tuesday and return on a Sunday

Cheap flight deals from George Bush Intcntl to London

Discover tips and strategies to find the most affordable flight options for your journey from George Bush Intcntl (IAH) to London (LON). 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 17, 2025.

Round-trip from

$512
(Mytrip)

One-way from

$289
(oojo)

Popular in

June

Cheapest in

October

Average price

$688

Good round-trip deal

$643 or less

Good one-way deal

$458 or less
From Houston George Bush Intcntl to London (LON)
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One-way flight from Houston George Bush Intcntl to London (LON)
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Highest demand for flights based on searches. 23% potential increase in price ($243 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($37 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 (LON).
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Price to beat on a one-way flight from Houston George Bush Intcntl to London (LON).
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Find flight deals from George Bush Intcntl to London

Cheapest flights from George Bush Intcntl to London
Explore the most affordable flight options available from George Bush Intcntl to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2025.

This Mytrip deal was found by Cheapflights users on 9/15. 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.
Tue 10/1412:05 pmIAH - LHR
2 stops15h 30mAir Canada
Tue 10/216:50 amLHR - IAH
2 stops21h 24mAir Canada
Deal found 9/15$512
This United Airlines deal was found by Cheapflights users on 9/17. 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 9/284:20 pmIAH - LHR
Nonstop9h 20mUnited Airlines
Tue 10/141:40 pmLHR - IAH
Nonstop10h 15mUnited Airlines
Deal found 9/17$513
This United Airlines deal was found by Cheapflights users on 9/14. 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 10/86:05 pmIAH - LHR
1 stop12h 15mUnited Airlines
Thu 10/2310:00 amLHR - IAH
Nonstop10h 15mUnited Airlines
Deal found 9/14$514
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/158:15 pmIAH - LHR
Nonstop9h 20mUnited Airlines
Thu 10/306:35 amLHR - IAH
1 stop15h 35mUnited Airlines
Deal found 9/15$515
This Norse deal was found by Cheapflights users on 9/15. 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 Norse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/15:48 pmIAH - LGW
1 stop34h 12mMultiple Airlines
Wed 10/82:00 pmLGW - IAH
1 stop27h 51mMultiple Airlines
Deal found 9/15$515
This United Airlines deal was found by Cheapflights users on 9/16. 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.
Fri 10/1710:17 amIAH - LHR
2 stops52h 43mUnited Airlines
Wed 11/512:05 pmLHR - IAH
Nonstop10h 45mUnited Airlines
Deal found 9/16$516
This Delta deal was found by Cheapflights users on 9/17. 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.
Tue 9/301:13 pmIAH - LHR
1 stop12h 02mDelta
Tue 11/118:55 amLHR - IAH
2 stops18h 17mDelta
Deal found 9/17$517
This Delta deal was found by Cheapflights users on 9/16. 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.
Sun 9/285:45 amIAH - LHR
1 stop19h 00mDelta
Tue 10/146:30 amLHR - IAH
2 stops17h 29mDelta
Deal found 9/16$518
This Norse deal was found by Cheapflights users on 9/15. 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 Norse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1212:17 pmIAH - LGW
1 stop15h 43mMultiple Airlines
Mon 1/122:00 pmLGW - IAH
1 stop15h 13mMultiple Airlines
Deal found 9/15$518
This Delta deal was found by Cheapflights users on 9/17. 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.
Sun 9/2810:30 amIAH - LHR
1 stop13h 55mDelta
Fri 11/146:20 amLHR - IAH
1 stop13h 35mDelta
Deal found 9/17$519
This United Airlines deal was found by Cheapflights users on 9/17. 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 10/154:20 pmIAH - LHR
Nonstop9h 20mUnited Airlines
Wed 10/229:30 amLHR - IAH
2 stops15h 15mUnited Airlines
Deal found 9/17$520
This Kiwi.com deal was found by Cheapflights users on 9/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/14:36 pmIAH - LGW
1 stop35h 24mMultiple Airlines
Fri 11/142:00 pmLGW - IAH
1 stop25h 33mMultiple Airlines
Deal found 9/17$520

Cheapflights Fare Finder

 
Customize your flight search to find flights from George Bush Intcntl to London 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 17, 2025.
Use the filters below to find and compare flights from Houston George Bush Intcntl Airport to London that are best for you.

Fly from

George Bush Intcntl

Fly to

London

Route

Depart

Return

Price

HoustonLondon

IAH - LHR

IAHLHR

Houston George Bush Intcntl

Wed 11/5

1:29 pm-7:50 am

1 stop12h 21m

London Heathrow

Wed 11/12

6:20 am-5:50 pm

2 stops17h 30m

$516

HoustonLondon

IAH - LHR

IAHLHR

Houston George Bush Intcntl

Tue 12/2

12:59 pm-8:45 am

1 stop13h 46m

London Heathrow

Fri 12/12

8:55 am-10:22 pm

2 stops19h 27m

$516

HoustonLondon

IAH - LHR

IAHLHR

Houston George Bush Intcntl

Wed 11/19

11:05 am-7:05 am

1 stop14h 00m

London Heathrow

Thu 11/27

8:40 am-10:30 pm

2 stops19h 50m

$517

HoustonLondon

IAH - LHR

IAHLHR

Houston George Bush Intcntl

Wed 10/8

7:05 am-6:45 am

1 stop17h 40m

London Heathrow

Tue 10/21

8:40 am-10:11 pm

2 stops19h 31m

$518

HoustonLondon

IAH - LHR

IAHLHR

Houston George Bush Intcntl

Tue 10/21

11:49 am-11:10 am

1 stop17h 21m

London Heathrow

Mon 10/27

5:35 pm-2:55 pm

1 stop26h 20m

$519

HoustonLondon

IAH - LHR

IAHLHR

Houston George Bush Intcntl

Tue 10/7

9:00 pm-12:20 pm

Nonstop9h 20m

London Heathrow

Wed 10/29

9:35 am-3:05 pm

Nonstop10h 30m

$524

HoustonLondon

IAH - LHR

IAHLHR

Houston George Bush Intcntl

Sat 11/22

6:13 pm-6:40 am

1 stop30h 27m

London Heathrow

Wed 12/3

10:00 am-2:45 pm

Nonstop10h 45m

$526

HoustonLondon

IAH - LHR

IAHLHR

Houston George Bush Intcntl

Sun 9/28

4:20 pm-7:40 am

Nonstop9h 20m

London Heathrow

Mon 10/6

8:30 am-1:35 pm

1 stop35h 05m

$536

HoustonLondon

IAH - LHR

IAHLHR

Houston George Bush Intcntl

Tue 11/18

9:38 am-7:55 am

2 stops16h 17m

London Heathrow

Mon 11/24

5:35 pm-1:55 pm

1 stop26h 20m

$539

HoustonLondon

IAH - LHR

IAHLHR

Houston George Bush Intcntl

Wed 10/8

1:29 pm-10:45 am

2 stops15h 16m

London Heathrow

Mon 10/13

5:35 pm-1:35 pm

1 stop26h 00m

$551

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 60 results
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The best insider tips for Houston George Bush Intcntl Airport to London 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 trip
Airports
IAH

Check the IAH website for security wait times to ensure a smooth departure.

Read more about IAHby Evie Carrick
LHR

Take the Heathrow Express for the fastest route to central London from LHR.

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 London

Have a flexible travel schedule? Discover the best time to fly to London 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

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

Use this chart to determine the optimal time to book a round-trip flight from George Bush Intcntl to London. Price data was last updated on September 12, 2025.

Booking 33 days in advance of your planned departure date is, on average, the best time to get cheap flights from Houston George Bush Intcntl Airport to London. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, November is the cheapest month in which you can book a flight from Houston George Bush Intcntl Airport to London (average of $661). Flying from Houston George Bush Intcntl Airport to London 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 LON?

Find hourly flight availability from George Bush Intcntl to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 17, 2025.

When flying from Houston George Bush Intcntl Airport to London, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 13% versus a flight in the evening.

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

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

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

Weekly flight availability from Houston George Bush Intcntl Airport to London

Explore weekly flight availability from George Bush Intcntl to London. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated September 17, 2025.

The most flights from IAH to LON are scheduled on a Monday (22 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (17 on average).

What’s the top layover airport for flights from Houston George Bush Intcntl Airport to London?

Share of 1-stop round-trip flights from Houston George Bush Intcntl Airport to London chosen by Cheapflights users in the past 12 months, using the same layover each way.

Miami (MIA) – chosen by Cheapflights users on 50% of 1-stop itineraries from Houston George Bush Intcntl Airport to London on Cheapflights.

What’s the cheapest layover airport for flights from Houston George Bush Intcntl Airport to London?

Average round-trip fare for 1-stop flights from Houston George Bush Intcntl Airport to London, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Miami (MIA) is the most affordable 1-stop option, with an average round-trip price of $765.

What’s the fastest layover option from Houston George Bush Intcntl Airport to London?

Shortest average travel time for 1-stop one-way flights from Houston George Bush Intcntl Airport to London, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Miami (MIA) have the shortest average one-way travel time for 1-stop routes: 12h 22m.

Which airport typically offers the quickest layover for flights from Houston George Bush Intcntl Airport to London?

Average layover duration for 1-stop one-way flights from Houston George Bush Intcntl Airport to London, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Boston (BOS) offer the fastest connection on this route, with an average layover time of 11h 28m.

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. 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 London. Reviews last updated September 17, 2025.
Read reviews from past customers who have flown Finnair, United Airlines, and American Airlines from Houston George Bush Intcntl Airport to London. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Finnair
7.6
Good
1,324 reviews

Entertainment

6.9

Overall

7.6

Boarding

7.6

Comfort

7.5

Crew

8.1

Food

6.7

Reviews

1 / 20
2.0
Mediocre

Rowland,Dec 2024

HEL - HKG

Finnair, a large European airline, have a very poor boarding practice whereby they collect every passenger waiting at the gate into an even smaller closed in area after checking passports (again) and boarding cards - then simply open the boarding causing a crowd crush as ALL passengers attempt to board all at once. Surely a more controllable method these days is to board via seat row numbers?
Finnair
7.6
Good
1,324 reviews
Finnair
7.6
Good
1,324 reviews

Entertainment

6.9

Overall

7.6

Boarding

7.6

Comfort

7.5

Crew

8.1

Food

6.7

Reviews

1 / 20
2.0
Mediocre

Rowland,Dec 2024

HEL - HKG

Finnair, a large European airline, have a very poor boarding practice whereby they collect every passenger waiting at the gate into an even smaller closed in area after checking passports (again) and boarding cards - then simply open the boarding causing a crowd crush as ALL passengers attempt to board all at once. Surely a more controllable method these days is to board via seat row numbers?
United Airlines
7.4
Good
8,926 reviews
Finnair
7.6
Good
1,324 reviews

Entertainment

6.9

Overall

7.6

Boarding

7.6

Comfort

7.5

Crew

8.1

Food

6.7

Reviews

1 / 20
2.0
Mediocre

Rowland,Dec 2024

HEL - HKG

Finnair, a large European airline, have a very poor boarding practice whereby they collect every passenger waiting at the gate into an even smaller closed in area after checking passports (again) and boarding cards - then simply open the boarding causing a crowd crush as ALL passengers attempt to board all at once. Surely a more controllable method these days is to board via seat row numbers?
American Airlines
7.2
Good
10,000 reviews
Finnair
7.6
Good
1,324 reviews

Entertainment

6.9

Overall

7.6

Boarding

7.6

Comfort

7.5

Crew

8.1

Food

6.7

Reviews

1 / 20
2.0
Mediocre

Rowland,Dec 2024

HEL - HKG

Finnair, a large European airline, have a very poor boarding practice whereby they collect every passenger waiting at the gate into an even smaller closed in area after checking passports (again) and boarding cards - then simply open the boarding causing a crowd crush as ALL passengers attempt to board all at once. Surely a more controllable method these days is to board via seat row numbers?
Iberia
7.0
Good
2,925 reviews
Finnair
7.6
Good
1,324 reviews

Entertainment

6.9

Overall

7.6

Boarding

7.6

Comfort

7.5

Crew

8.1

Food

6.7

Reviews

1 / 20
2.0
Mediocre

Rowland,Dec 2024

HEL - HKG

Finnair, a large European airline, have a very poor boarding practice whereby they collect every passenger waiting at the gate into an even smaller closed in area after checking passports (again) and boarding cards - then simply open the boarding causing a crowd crush as ALL passengers attempt to board all at once. Surely a more controllable method these days is to board via seat row numbers?
British Airways
6.7
Okay
7,367 reviews
Finnair
7.6
Good
1,324 reviews

Entertainment

6.9

Overall

7.6

Boarding

7.6

Comfort

7.5

Crew

8.1

Food

6.7

Reviews

1 / 20
2.0
Mediocre

Rowland,Dec 2024

HEL - HKG

Finnair, a large European airline, have a very poor boarding practice whereby they collect every passenger waiting at the gate into an even smaller closed in area after checking passports (again) and boarding cards - then simply open the boarding causing a crowd crush as ALL passengers attempt to board all at once. Surely a more controllable method these days is to board via seat row numbers?

Related info for your journey

Find useful and relevant information for your journey from George Bush Intcntl to London. 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?

    Departing from Houston George Bush Intcntl Airport to London will take you 11h 20m. Houston George Bush Intcntl Airport and London are separated by a distance of 4840 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    JetBlue, at $101, was found to be the cheapest airline from Houston George Bush Intcntl Airport to London.Alternate airlines to your destination round-trip include American Airlines and British Airways. These flights start at 87% lower than the current average price 3 months from now.

  • What are the most popular routes from Houston George Bush Intcntl Airport to London?

    When deciding which route to take from Houston George Bush Intcntl Airport to London consider Houston George Bush Intcntl - London Heathrow, Houston George Bush Intcntl - London Gatwick or Houston George Bush Intcntl - London City as they are the most popular.

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

    Consider American Airlines (87%), Aer Lingus (87%) or Finnair (87%) when booking your flight. These represent the most reliable airlines when flying from Houston George Bush Intcntl Airport to London.

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

    Looking at all options, your cheapest flight can be booked for $393. While the most popular route (Houston George Bush Intcntl - London Heathrow) can be booked for $472 on average, our data indicates $2,918 when flying from Houston George Bush Intcntl Airport to London.

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

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

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

    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 London.

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

    Yes. Cheapflights offers flight deals from George Bush Intcntl to London 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?

    Currently, November is the cheapest month in which you can book a flight from Houston George Bush Intcntl Airport to London (average of $661). Flying from Houston George Bush Intcntl Airport to London 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

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Alternative routes for George Bush Intcntl to London

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Top 10 airlines flying from George Bush Intcntl to London

Discover the top 10 airlines that operate flights from George Bush Intcntl to London. 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 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$101Average$569FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$551Average$758FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$574Average$884FlexibilityNo cancel feeOn-time70%
IberiaCheapest$576Average$758FlexibilityNo cancel feeOn-time77%
FinnairCheapest$582Average$739FlexibilityNo cancel feeOn-time76%
Virgin AtlanticCheapest$582Average$783FlexibilityNo cancel feeOn-time72%
United AirlinesCheapest$586Average$896FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$612Average$874FlexibilityNo cancel feeOn-time76%
DeltaCheapest$631Average$1,049FlexibilityNo cancel feeOn-timeN/A
Austrian AirlinesCheapest$644Average$1,343FlexibilityNo cancel feeOn-time78%

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