In terms of precipitation, rainfall in London Heathrow Airport ranges from 1.6 - 2.8 inches per month. January is typically the wettest month, when rainfall can reach 2.8 in. July is typically the driest time to visit London Heathrow Airport when rainfall is around 1.6 in.

If weather is an important factor for your trip to London Heathrow Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

What are the most popular airlines that fly from Houston George Bush Intcntl Airport to London Heathrow Airport?

The most popular airlines flying from Houston George Bush Intcntl Airport to London Heathrow Airport are American Airlines, Air Canada and Finnair. Something to consider prior to booking your flight.

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

Flying to your destination on a Friday can be more expensive, but this shouldn’t discourage you from finding affordable options to get to London Heathrow Airport. Check prices with Cheapflights to find a great deal for your trip.

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.

$253+ Flights from Houston George Bush Intcntl Airport to London Heathrow Airport

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Cheapflights Tip: The best prices from Houston George Bush Intcntl to London Heathrow are usually found in April or September, booked 69 days in advance, depart on a Wednesday or Tuesday and return on a Sunday

Cheap flight deals from George Bush Intcntl to Heathrow

Round-trip from	$662 (United Airlines)
One-way from	$253 (Mytrip)
Popular in	June
Cheapest in	April
Average price	$1,015
Good round-trip deal	$708 or less
Good one-way deal	$492 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 ($227 potential increase over avg. RT price).

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Cheapest flight prices on average. 5% potential price decrease ($40 potential savings vs. average RT price).

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Average for round-trip flights in July 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 July 3, 2025.

Wed 8/139:50 amIAH - LHR

1 stop14h 05mUnited Airlines

Tue 8/1911:25 amLHR - IAH

1 stop17h 04mUnited Airlines

Deal found 7/3

$662

Fri 8/159:00 pmIAH - LHR

Nonstop9h 20mBritish Airways

Thu 8/282:50 pmLHR - IAH

Nonstop10h 25mBritish Airways

Deal found 7/3

$663

Tue 9/1610:00 amIAH - LHR

1 stop17h 35mMultiple Airlines

Tue 9/238:45 amLHR - IAH

2 stops17h 28mMultiple Airlines

Deal found 7/3

$668

Wed 7/167:20 amIAH - LHR

2 stops17h 10mAir Canada

Fri 8/296:50 amLHR - IAH

2 stops18h 46mAir Canada

Deal found 7/1

$672

Tue 9/24:00 pmIAH - LHR

2 stops15h 45mDelta

Fri 9/126:15 amLHR - IAH

2 stops17h 19mDelta

Deal found 7/3

$673

Fri 8/13:30 pmIAH - LHR

Nonstop9h 10mAmerican Airlines

Fri 8/83:00 pmLHR - IAH

1 stop13h 53mAmerican Airlines

Deal found 7/2

$677

Sun 8/103:35 pmIAH - LHR

1 stop13h 05mLufthansa

Mon 8/258:25 pmLHR - IAH

2 stops23h 10mLufthansa

Deal found 7/1

$679

Mon 11/106:00 pmIAH - LHR

1 stop11h 40mKLM

Fri 11/146:30 amLHR - IAH

1 stop13h 00mKLM

Deal found 6/30

$699

Sat 8/236:50 pmIAH - LHR

1 stop29h 35mIberia

Tue 8/263:10 pmLHR - IAH

1 stop13h 05mIberia

Deal found 7/2

$708

Best flights from George Bush Intcntl to Heathrow
Discover carefully curated flight deals from George Bush Intcntl to Heathrow that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 3, 2025.

Wed 8/1312:04 pmIAH - LHR

1 stop12h 41mUnited Airlines

Fri 8/224:40 pmLHR - IAH

1 stop13h 37mUnited Airlines

Deal found 7/3

$662

Fri 8/159:00 pmIAH - LHR

Nonstop9h 20mBritish Airways

Thu 8/282:50 pmLHR - IAH

Nonstop10h 25mBritish Airways

Deal found 7/3

$663

Tue 9/1610:00 amIAH - LHR

1 stop17h 35mMultiple Airlines

Tue 9/238:45 amLHR - IAH

2 stops17h 28mMultiple Airlines

Deal found 7/3

$668

Wed 7/1612:00 pmIAH - LHR

1 stop17h 50mAir Canada

Fri 8/296:50 amLHR - IAH

2 stops18h 46mAir Canada

Deal found 7/1

$672

Tue 9/24:00 pmIAH - LHR

2 stops15h 45mDelta

Fri 9/126:15 amLHR - IAH

2 stops17h 19mDelta

Deal found 7/3

$673

Fri 8/13:30 pmIAH - LHR

Nonstop9h 10mAmerican Airlines

Fri 8/83:00 pmLHR - IAH

1 stop13h 53mAmerican Airlines

Deal found 7/2

$677

Sun 8/103:35 pmIAH - LHR

1 stop13h 05mLufthansa

Mon 8/258:25 pmLHR - IAH

2 stops23h 10mLufthansa

Deal found 7/1

$679

Sat 8/236:50 pmIAH - LHR

1 stop29h 35mIberia

Tue 8/263:10 pmLHR - IAH

1 stop13h 05mIberia

Deal found 7/2

$708

Last-minute flights from George Bush Intcntl to Heathrow
Discover last-minute flight deals from George Bush Intcntl to Heathrow. Data last updated July 3, 2025 and is based on user searches.

Wed 7/98:48 pmIAH - LHR

3 stops30h 47mMultiple Airlines

Tue 7/158:45 amLHR - IAH

3 stops35h 11mMultiple Airlines

Deal found 7/1

$894

Wed 7/94:57 pmIAH - LHR

1 stop31h 33mJetBlue

Fri 8/88:25 amLHR - IAH

1 stop32h 24mJetBlue

Deal found 7/2

$924

Thu 7/109:00 pmIAH - LHR

1 stop19h 25mTurkish Airlines

Mon 7/146:55 pmLHR - IAH

1 stop30h 10mTurkish Airlines

Deal found 7/3

$817

Thu 7/1011:58 amIAH - LHR

1 stop12h 32mIcelandair

Fri 11/218:25 amLHR - IAH

1 stop31h 03mIcelandair

Deal found 7/1

$864

Thu 7/106:01 amIAH - LHR

2 stops19h 59mAer Lingus

Fri 11/217:50 amLHR - IAH

2 stops21h 28mAer Lingus

Deal found 7/1

$1,206

Thu 7/103:30 pmIAH - LHR

Nonstop9h 10mIberia

Fri 11/219:30 amLHR - IAH

Nonstop10h 40mIberia

Deal found 7/1

$1,231

Thu 7/104:20 pmIAH - LHR

Nonstop9h 20mUnited Airlines

Fri 11/217:40 amLHR - IAH

1 stop14h 30mUnited Airlines

Deal found 7/1

$1,232

Thu 7/109:00 pmIAH - LHR

Nonstop9h 20mBritish Airways

Fri 11/219:30 amLHR - IAH

Nonstop10h 40mBritish Airways

Deal found 7/1

$1,242

Sun 7/1312:00 pmIAH - LHR

1 stop17h 50mAir Canada

Sat 7/195:40 pmLHR - IAH

2 stops23h 35mAir Canada

Deal found 7/3

$1,129

Wed 7/167:20 amIAH - LHR

2 stops17h 10mAir Canada

Fri 8/296:50 amLHR - IAH

2 stops18h 46mAir Canada

Deal found 7/1

$672

Tue 7/221:07 pmIAH - LHR

1 stop12h 08mDelta

Wed 8/612:45 pmLHR - IAH

1 stop16h 39mDelta

Deal found 7/1

$684

Fri 8/13:30 pmIAH - LHR

Nonstop9h 10mAmerican Airlines

Fri 8/83:00 pmLHR - IAH

1 stop13h 53mAmerican Airlines

Deal found 7/2

$677

One-way flights from George Bush Intcntl to Heathrow
Search for one-way flight options from George Bush Intcntl to Heathrow. Find affordable one-way fares based on user searches. Data last updated July 3, 2025.

Tue 7/227:15 amIAH - LHR

2 stops28h 30mMultiple Airlines

Deal found 7/2

$253

Wed 12/31:35 pmIAH - LHR

1 stop17h 15mWestJet

Deal found 7/2

$293

Cheapflights Fare Finder

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

Fly to

Route

Depart

Return

Price

HoustonLondon

IAH - LHR

IAHLHR

Houston George Bush Intcntl

Wed 8/13

9:50 am-5:55 am

1 stop14h 05m

London Heathrow

Tue 8/19

11:25 am-10:29 pm

1 stop17h 04m

$662

HoustonLondon

IAH - LHR

IAHLHR

Houston George Bush Intcntl

Fri 8/15

9:00 pm-12:20 pm

Nonstop9h 20m

London Heathrow

Thu 8/28

2:50 pm-7:15 pm

Nonstop10h 25m

$663

HoustonLondon

IAH - LHR

IAHLHR

Houston George Bush Intcntl

Tue 9/16

10:00 am-9:35 am

1 stop17h 35m

London Heathrow

Tue 9/23

8:45 am-8:13 pm

2 stops17h 28m

$668

HoustonLondon

IAH - LHR

IAHLHR

Houston George Bush Intcntl

Wed 7/16

7:20 am-6:30 am

2 stops17h 10m

London Heathrow

Fri 8/29

6:50 am-7:36 pm

2 stops18h 46m

$672

HoustonLondon

IAH - LHR

IAHLHR

Houston George Bush Intcntl

Tue 9/2

4:00 pm-1:45 pm

2 stops15h 45m

London Heathrow

Fri 9/12

6:15 am-5:34 pm

2 stops17h 19m

$673

HoustonLondon

IAH - LHR

IAHLHR

Houston George Bush Intcntl

Fri 8/1

3:30 pm-6:40 am

Nonstop9h 10m

London Heathrow

Fri 8/8

3:00 pm-10:53 pm

1 stop13h 53m

$677

HoustonLondon

IAH - LHR

IAHLHR

Houston George Bush Intcntl

Sun 8/10

3:35 pm-10:40 am

1 stop13h 05m

London Heathrow

Mon 8/25

8:25 pm-1:35 pm

2 stops23h 10m

$679

HoustonLondon

IAH - LHR

IAHLHR

Houston George Bush Intcntl

Mon 11/10

6:00 pm-11:40 am

1 stop11h 40m

London Heathrow

Fri 11/14

6:30 am-1:30 pm

1 stop13h 00m

$699

HoustonLondon

IAH - LHR

IAHLHR

Houston George Bush Intcntl

Sat 8/23

6:50 pm-6:25 am

1 stop29h 35m

London Heathrow

Tue 8/26

3:10 pm-10:15 pm

1 stop13h 05m

$708

HoustonLondon

IAH - LHR

IAHLHR

Houston George Bush Intcntl

Tue 7/22

7:15 am-5:45 pm

2 stops28h 30m

$253

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

Showing 1-10 of 11 results

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

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.

LHR

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

Our travel experts

Evie Carrick

Expert on IAH

Ramsey Qubein

Expert on LHR

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?

The best time to book flights from Houston George Bush Intcntl Airport to London Heathrow Airport is 69 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 $1,098). 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?

Unlike in the evening, when flights are generally more expensive, you can save up to 11% 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?

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.

Weekly flight availability from Houston George Bush Intcntl Airport to London Heathrow Airport

The most flights from IAH to LHR 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).

Reviews of airlines servicing Heathrow

Get a feel of what it's like to fly with Delta, United Airlines, and American Airlines 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.

Delta

8.0

Very good

7,982 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Delta

8.0

Very good

7,982 reviews

Delta

8.0

Very good

7,982 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

United Airlines

7.4

Good

8,861 reviews

Delta

8.0

Very good

7,982 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

American Airlines

7.2

Good

10,000 reviews

Delta

8.0

Very good

7,982 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

WestJet

7.2

Good

2,917 reviews

Delta

8.0

Very good

7,982 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Air Canada

7.1

Good

9,681 reviews

Delta

8.0

Very good

7,982 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

What are the cheapest airlines flying from Houston George Bush Intcntl Airport to London Heathrow Airport round-trip?
Currently priced at $662, United Airlines will fly you from Houston George Bush Intcntl Airport to London Heathrow Airport and back. In addition to United Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from British Airways and Air Canada - these airlines can fly you to your destination from $663 and $672, respectively. These flights start at 19% 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 (68%), Aer Lingus (68%), Finnair( 68%).
What are the cheapest flights from Houston George Bush Intcntl Airport to London Heathrow Airport?
On average you can expect to pay $2,903 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 $521.
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 $1,098). 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

Hounslow

Hayes

Thornton Heath

Canterbury

Harrow

Dover

Stratford-upon-Avon

Gatwick

Orpington

Watford

Northampton

Croydon

Folkestone

Borehamwood

Broadway

Aylesbury

Chelmsford

Brentwood

Chichester

Swindon

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Top 10 airlines flying from George Bush Intcntl to Heathrow

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest$396	Average$938	FlexibilityNo cancel fee	On-timeN/A
Air Canada	Cheapest$574	Average$734	FlexibilityNo cancel fee	On-time67%
Iberia	Cheapest$580	Average$743	FlexibilityNo cancel fee	On-time77%
Finnair	Cheapest$581	Average$736	FlexibilityNo cancel fee	On-time76%
Virgin Atlantic	Cheapest$582	Average$783	FlexibilityNo cancel fee	On-time72%
Lufthansa	Cheapest$611	Average$817	FlexibilityNo cancel fee	On-time76%
United Airlines	Cheapest$616	Average$905	FlexibilityNo cancel fee	On-time69%
British Airways	Cheapest$620	Average$901	FlexibilityNo cancel fee	On-time70%
American Airlines	Cheapest$622	Average$864	FlexibilityNo cancel fee	On-time71%
Austrian Airlines	Cheapest$1,125	Average$1,343	FlexibilityNo cancel fee	On-time78%

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$253+ 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 7/22. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from George Bush Intcntl to Heathrow with Cheapflights

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Cheapflights Tip: The best prices from Houston George Bush Intcntl to London Heathrow are usually found in April or September, booked 69 days in advance, depart on a Wednesday or Tuesday and return on a Sunday

Cheap flight deals from George Bush Intcntl to Heathrow

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Find flight deals from George Bush Intcntl to Heathrow

Cheapest flights from George Bush Intcntl to HeathrowExplore 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 July 3, 2025.

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 July 3, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Houston George Bush Intcntl Airport to London Heathrow Airport that are best for you.

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

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

LHR

Our travel experts

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.

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 June 27, 2025.

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

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 July 3, 2025.

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.

Weekly flight availability from Houston George Bush Intcntl Airport to London Heathrow Airport

Reviews of airlines servicing Heathrow

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.

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

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

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

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

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

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

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

Traveling to a place near Houston George Bush Intcntl Airport?

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Alternative routes for George Bush Intcntl to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.

Top 10 airlines flying from George Bush Intcntl to Heathrow

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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 July 3, 2025.